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Effective URL: https://www.contentful.com/developers/docs/references/graphql/
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Effective URL: https://www.contentful.com/developers/docs/references/graphql/
Submission Tags: @phish_report
Submission: On May 09 via api from FI — Scanned from FI
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Developers * Developer portal * Documentation * Changelog * Blog * Pricing Select...Developer portalDocumentationChangelogBlogPricing SIGN UPLOGIN ConceptsTutorialsPlatformsAPI referenceExtensibilityWebhooksInfrastructureExperiencesComposeTools and Plugins * Introduction * Basic API Information * HTTP Methods * Authentication * API rate limits * Query complexity limits * Query size limits * Rich Text * Tags * Previewing content * Reference * Locale handling * Schema generation * Types * Reserved type names * Fields * Schema generation failure * Sys field * ContentfulMetadata field * Modeling relationships * One-to-one single-type relationships * One-to-one multi-type relationships * One-to-many single-type relationships * One-to-many multi-type relationships * Inline fragments * Link to single entry * Link to collection of entities * Entries * Assets * Locations * Rich text * Never * Collection fields * Arguments * Return value * Collection Filters * Limitations * Filter generation * Logical connectives * Filters by field type * sys filters * contentfulMetadata filters * Nested collection filters * Link Filtering * Collection Order * Limitations * Single resource fields * Arguments * Automatic Persisted Queries * Ordering Nested Collections * External references * Functions * Exploring the schema with GraphiQL * GraphQL Errors * GraphQL Errors Explained Documentation / API reference / GraphQL Content API GRAPHQL CONTENT API INTRODUCTION The GraphQL Content API provides a GraphQL API interface to the content from Contentful. Each Contentful space comes with a GraphQL schema based on its content model. This GraphQL schema is generated at request time and is always up-to-date with the current status of the space. You can use this API to consume both published and non-published content. Read more about this in the previewing content section. Note: For EU data residency customers, the Base URL is https://graphql.eu.contentful.com. BASIC API INFORMATION API Base URL https://graphql.contentful.com This is a read-only API BASIC API INFORMATION The Contentful GraphQL Content API is available at: Copyhttps://graphql.contentful.com/content/v1/spaces/{SPACE} It is also available for specific environments at: Copyhttps://graphql.contentful.com/content/v1/spaces/{SPACE}/environments/{ENVIRONMENT} Disclaimer: GraphQL Content API is available on all spaces for customers on current pricing plans. If you are on a legacy plan, contact Customer Support to upgrade. HTTP METHODS The GraphQL Content API supports both GET and POST methods. This is the query used in both examples below: Copyquery($preview: Boolean){ blogCollection(preview: $preview){ items{ title } } } POST The HTTPS POST method is more flexible and recommended. The query should be sent as a property in a JSON payload in the body of the POST request with the property name "query". Any required variables are added as an additional JSON property to the payload with the property name "variables". Copycurl -g \ -X POST \ -H "Content-Type: application/json" \ -H "Authorization: Bearer {TOKEN}" \ -d '{"query":"query($preview:Boolean){blogCollection(preview:$preview){items{title}}}","variables":{"preview":true}}' \ https://graphql.contentful.com/content/v1/spaces/{SPACE}/environments/{ENVIRONMENT} Supported values for Content-Type header are listed below: * application/json * application/json; charset=UTF-8. * application/x-www-form-urlencoded. * application/x-www-form-urlencoded; charset=UTF-8 Using application/json is encouraged. GET The HTTPS GET method requires that the query is included in the URL string as a parameter. You can also send any required variables in an additional "variables" parameter in JSON format. Copycurl -g \ -X GET \ -H "Content-Type: application/json" \ -H "Authorization: Bearer {TOKEN}" \ 'https://graphql.contentful.com/content/v1/spaces/{SPACE}/environments/{ENVIRONMENT}?query=query($preview:Boolean){blogCollection(preview:$preview){items{title}}}&variables={"preview":true}' AUTHENTICATION Any client using the API needs to provide an access token in either: * The Authorization header, specifically, Authorization: Bearer MY_TOKEN. * The access_token URL query parameter. The token must have access to the space and environment you're targeting. For example, if you create an access token that only has access to the master environment of your space, you cannot use that token to access content from any other environment or space. To learn more about authentication in Contentful and how to create your own access tokens take a look at the Authentication reference documentation. API RATE LIMITS API Rate limits specify the number of requests a client can make to Contentful APIs in a specific time frame. Every request counts against a per-second rate limit. There are no limits enforced on requests that hit our CDN cache, i.e. the request doesn't count towards your rate limit and you can make an unlimited amount of cache hits. For requests that do hit the GraphQL Content API, a rate limit of 55 requests per second is enforced. Higher rate limits may apply depending on your current plan. When a client gets rate limited, the API responds with the 429 Too Many Requests HTTP status code and sets the X-Contentful-RateLimit-Reset header that tells the client when it can make its next single request. The value of this header is an integer specifying the time before the limit resets and another request will be accepted. As the client is rate-limited per second, the header will return 1, which means the next second. Example The current rate limit for a client is the default 55 per second. Client: 85 uncached requests in 1 second CopyHTTP/1.1 429 X-Contentful-RateLimit-Reset: 1 Meaning: wait 1 second before making more requests. QUERY COMPLEXITY LIMITS Disclaimer: The default complexity limit for collections is 100. The query complexity is calculated as the maximum number of entries and assets a query can potentially return. Query complexity limits specify the amount of data a client can request from the GraphQL Content API in one request. You can currently request up to 11000 entities in one request. Example 1 Copyquery { lessonCollection(limit: 20) { items { title } } } The query above can return up to 20 Lessons. The query complexity is 20. Example 2 Copyquery { lessonCollection(limit: 20) { items { title imageCollection(limit: 10) { title url } } } } The query above can return up to 20 Lessons and up to 200 Assets (up to 10 for each of 20 Lessons). The query complexity is 220. Example 3 Copyquery { lessonCollection(limit: 20) { items { title participantsCollection (limit: 10) { ... on Person { name imageCollection(limit: 3) { title url } } ... on Pet { name imageCollection(limit: 5) { title url } } } } } } The query above can return up to 20 Lessons, up to 200 Participants (up to 10 for each of 20 Lessons) and up to 1000 Assets (up to 5 for each of 200 Participants). The query complexity is 1220. Parameters such as locale, preview, sorting, filtering or image transformations do not change query complexity. The API sets the X-Contentful-Graphql-Query-Cost response header to the calculated query complexity value. When a client gets query complexity limited, the API responds with a TOO_COMPLEX_QUERY error. QUERY SIZE LIMITS Query size limits specify the maximum size of the query parameter for GET requests and the total payload size for POST requests. This limit is 8kb. This limit includes whitespace and newline characters. Removing semantically unnecessary whitespaces and newline characters before sending a request can lower the query size. You can reduce the query size without manual editing using GraphQL minifiers, such as GQLMin. When the query size of a request exceeds the limit, the API returns a QUERY_TOO_BIG error. Note: You can use automatic persisted queries to bypass this limit if you are a customer on our Premium plan and above. RICH TEXT Rich Text fields work similarly when calculating complexity but have some special behaviour. The complexity of the links property in a RichText field is equal to the sum of the maximum number of allowed linked entries and assets in the validation settings for the field. In the following example the richText field is configured with a maximum limit of 5 embedded inline entries and a maximum of 0 of all other types of embedded entries or assets: Example Copyquery{ articleCollection(limit: 100) { items{ title bodyRichText { json links { entries { inline { sys { id } } } } } } } } The query above can return up to 100 article entries and up to 500 links (up to 5 for each of 100 article) due to the field validation settings. The query complexity is 500. By default a Rich Text field has a total limit of 1000 linked entities of all supported types. This means that by default the links field in each Rich Text entry has a complexity of 1000. The complexity is calculated as the maximum number of entries and assets a query can potentially return. TAGS The ContentfulMetadata tags field calculates its complexity in a special way. The complexity of the tags property in the ContentfulMetadata field is 1 for every entry or asset being queried for. This complexity cost remains the same regardless of the number of tags returned. Example Copyquery { articleCollection(limit: 100) { items{ title contentfulMetadata { tags { id name } } } } } The query above can return up to 100 Articles and up to 100 tags (up to 1 for each of 100 Articles). The query complexity is 200. PREVIEWING CONTENT Accessing non-published content can be useful when you want to, for example, preview how a new article will look before publishing it and making it public to everybody. The GraphQL API gives you the control to choose whether you want to access published or non-published content in a very granular fashion. To control whether you get published or non-published content you have to use the preview argument, available to both the single resource fields and collection fields. This argument cascades, meaning that all the references resolved from a resource with preview: true are also showing preview content, unless explicitly overridden. So for example the root level could use non-published content while a sub resource could use published content. This is explained in the example below: Copyquery { houseCollection (preview: true) { items { // "house" fields will use non published content houseNumber numberOfRooms owner { ... // content for the "owner" will also be non published } architect (preview: false) { ... // content for the "architect" will be published } } } } Any query that accesses non published content requires a preview access token. This includes queries that mix preview and published content. Follow the authentication section to learn how to generate a token and how to use it to authenticate the requests. Fields in queries that require access to non-published content but fail to provide a valid preview access token will be resolved with an ACCESS_TOKEN_INVALID error. REFERENCE LOCALE HANDLING You can specify a locale via the locale argument on collections, single entities, and entry fields: Copyquery { germanUser: friendlyUser(id: "hans", locale: "de-DE") { name } americanUser: friendlyUser(id: "joe", locale: "en-US") } If you don't specify a locale, the default locale of the space is used. Unlike the CDA, the GraphQL Content API does not support the locale wildcard. This argument cascades, meaning that all the references resolved from a resource with locale: "de-DE" will also show German content unless explicitly overridden. So for example the root level could use a different locale than a sub resource. When changing the locale on references, only the referenced entities are resolved with this locale. The reference field value itself is still resolved with the locale of the parent. This is explained in the example below: Copyquery { germanUser: friendlyUser(id: "hans", locale: "de-DE") { name germanPetsInFrench: petsCollection(locale: "fr-FR") { items { name } } } } Individual fields can also have a locale specified, giving the ability to fetch the same field in multiple locales using query aliases. Copyquery { germanUser: friendlyUser(id: "hans", locale: "de-DE") { name petsCollection { items { name nameInFrench: name(locale: "fr-FR") } } } } If requested locale does not exist, an UNKNOWN_LOCALE error is returned for this path. SCHEMA GENERATION The GraphQL schema definition is generated from the content model at request time so it is always current. TYPES The GraphQL schema is generated from the content types defined in the specified environment of the space (or master if no environment has been specified). For each content type in your environment the GraphQL Content API creates a corresponding GraphQL type. NAMES Type name is the pascalcase version of the content type ID, stripped of non-alphanumeric characters. For example: Original value Transformed value "my-2content-type" "My2ContentType" If two or more content type IDs would be transformed to the same type name, a COLLIDING_TYPE_NAMES error is returned. For more information about errors see the errors section. If the generated name starts with a number or collides with a reserved type name, it gets prefixed with 'ContentType'. For example: Original content type id Transformed type name Location ContentTypeLocation 5TbTQ4S6xqSeAU6WGQmQ2e ContentType5TbTQ4S6xqSeAU6WGQmQ2e In order to keep the original name in query response, consider using aliases like: Copyquery { location: contentTypeLocation(id: "some-id") { # ... location fields } } RESERVED TYPE NAMES Query, String, Int, Float, Boolean, Location, Circle, Rectangle, DateTime, RichText, Asset, AssetCollection, AssetLinkingCollections, AssetFilter, AssetOrder, Entry, EntryCollection, EntryOrder, Sys, SysFilter, ContentfulMetadata, ContentfulTag, ContentfulMetadataFilter, ContentfulMetadataTagsFilter, Dimension, HexColor, Quality, ImageResizeFocus, ImageResizeStrategy, ImageFormat, ImageTransformOptions, ResourceSys, ResourceLink, ResourceLinkCollection and Never. EXAMPLE For example, a single content type is defined as following: Copy{ sys: { id: "friendly-user" }, fields: [ ... ] } Using this content type definition, the API calls automatically generates the corresponding schema definition. Notice how the GraphQL type is named after the content type ID. The produced Query object exposes two fields that you can use to query content of that type: one for fetching individual content docs (friendlyUser in the example) and another to do queries over all the content of the type (friendlyUserCollection). Collections are explained in more detail in the Collections section. Copytype Sys { id: String spaceId: String environmentId: String } type ContentfulMetadata { tags: [ContentfulTag]! } type ContentfulTag { id: String! name: String! } type FriendlyUser { sys: Sys contentfulMetadata: ContentfulMetadata # ... fields } input FriendlyUserFilter { # ... field based filters } type FriendlyUserCollection { skip: Int! limit: Int! total: Int! nodes: [FriendlyUser]! } type Query { friendlyUser(id: String!): FriendlyUser friendlyUserCollection( skip: Int limit: Int, where: FriendlyUserFilter ): FriendlyUserCollection } FIELDS GraphQL type fields are generated from the corresponding content type fields. Each type has three additional fields: sys, contentfulMetadata and linkedFrom. NAMES Field name is the lower camelcased version of the field ID, stripped of non-alphanumeric characters. For example: Original value Transformed value "my-field8-name" "myField8Name" If two or more field IDs on the same content type would be transformed to the same field name, a COLLIDING_FIELD_NAMES error is returned. If the generated name collides with a reserved field name, a RESERVED_FIELD_NAME error is returned. Reserved field names are sys, contentfulMetadata and linkedFrom. For more information about errors see the errors section. TYPES Field type is determined based on the following mappings: Contentful type GraphQL Type Symbol String Text String Number Float Integer Int Date DateTime Boolean Boolean Object JSON Array of Symbol [String] Fields of type Link and Array of Link are handled as explained in Modeling relationships. Fields of type Location are handled as explained in Locations. Fields of type RichText are handled as explained in Rich text. Fields of type Never are handled as explained in Never. ARGUMENTS Fields on entries provide an optional locale argument, allowing the locale to be overridden for a single field. The current scope's locale is used if a locale is not specified. If the requested locale does not exist, an UNKNOWN_LOCALE error is returned for this path. EXAMPLE Next, continue with the previous example and extend the Friendly User content type with three fields: age, name and addresses. Copy{ name: "Friendly User" sys: { id: "friendly-user", ... }, fields: [ { id: "age", type: "Integer" }, { id: "name", type: "Symbol" }, { id: "addresses", type: "Array", items: { type: "Symbol" } } ] } The resulting GraphQL schema is: Copytype FriendlyUser { sys: Sys contentfulMetadata: ContentfulMetadata linkedFrom: FriendlyUserLinkingCollections age(locale: String): Int name(locale: String): String addresses(locale: String): [String] } SCHEMA GENERATION FAILURE Schema generation fails when: * Two or more content type IDs would be transformed to the same type name. * Two or more field IDs on the same content type would be transformed to the same field name. * Any field ID would be transformed to sys, contentfulMetadata or linkedFrom field name. You cannot change the content type ID without regenerating the content type, so be aware of these restrictions while creating your content models. COLLIDING TYPE NAMES In order to successfully generate the schema, the GraphQL type generated from a content type id has to be unique. Type uniqueness check will fail if a content type id is transformed into a GraphQL type that already exists. This can happen in two cases: * when two or more content type ids are transformed into the same GraphQL type name * when a content type id is transformed into a GraphQL type name that collides with the existing GraphQL helper type While the first case is straightforward, let's take a closer look at the second case. GraphQL generates the following helper types for each content type: * Collection * LinkingCollections * Filter * Order For a content type Plants with id plants, GraphQL will generate type Plants and the following helper types: * PlantsCollection * PlantsLinkingCollections * PlantsFilter * PlantsOrder If we happen to have a second content type called PlantsOrder with id plantsOrder, schema creation will fail. The GraphQL type PlantsOrder will collide with the PlantsOrder helper type generated for Plants content type. To avoid type name collisions for a new content type, make sure that the GraphQL types and helper types generated for it won't collide with any of the existing GraphQL types. SYS FIELD Each GraphQL type is derived from a content type and the Asset type will also have a system-defined sys field. This field exposes meta-information about the content. Copytype Sys { id: String! spaceId: String! environmentId: String! publishedAt: DateTime firstPublishedAt: DateTime publishedVersion: Int } type MyContentType { ... # content fields sys: Sys! } type Asset { ... # content fields sys: Sys! } The table below describes each of the fields in the GraphQL Sys type Field Type Description id String Unique identifier of the resource. spaceId String Unique identifier of the resource's space. environmentId String Unique identifier of the resource's environment. publishedAt DateTime DateTime string of the resource's last published time. firstPublishedAt DateTime DateTime string of the resource's first published time. publishedVersion Int The version of the draft resource when it was published. CONTENTFULMETADATA FIELD Each GraphQL type derived from a content type and the Asset type will also have a contentfulMetadata field. This field exposes information on the public tags that exist on the content. To learn more about tags, see the tags section in our API reference page. Copytype ContentfulMetadata { tags: [ContentfulTag]! } type ContentfulTag { id: String! name: String! } type MyContentType { ... # content fields contentfulMetadata: ContentfulMetadata } type Asset { ... # content fields contentfulMetadata: ContentfulMetadata } The table below describes each of the fields in the GraphQL ContentfulMetadata type Field Type Description id String Unique identifier of the tag. name String The resolved tag name. MODELING RELATIONSHIPS One of the benefits of GraphQL is that it simplifies traversing the graph of relationships between different types. In Contentful, relationships are modeled using links. An entry field can be a link to another entry or a list of links to other entries. The content type of the entries that can be linked from a given field can be restricted using the linkContentType validation. Although optional, it is recommended to define linkContentType for your link fields for a better experience. The GraphQL schema uses this validation to determine the type of a link field. A field may also link to an asset by specifying linkType: "Asset". In this case there is no linkContentType validation, the GraphQL type of the field is always Asset. The following sections explain in detail how different kinds of relationships are modeled and how the corresponding GraphQL schema functionality looks. ONE-TO-ONE SINGLE-TYPE RELATIONSHIPS One-to-one single-type relationships are modeled by content type fields that link to at most one entry of a fixed type. For example, each FriendlyUser entry has a manager field that links to one entry of content type FriendlyUser. Copy{ name: "Friendly User" sys: { id: "friendly-user", ... }, fields: [ ..., { id: "manager", type: "Link", linkType: "Entry", validations: [{ linkContentType: ["friendlyUser"] }] } ] } This results in the following schema: Copytype FriendlyUser { sys: Sys contentfulMetadata: ContentfulMetadata manager: FriendlyUser # ... other fields } ONE-TO-ONE MULTI-TYPE RELATIONSHIPS It is possible for an entry field to link to entries of different content types. For example, each FriendlyUser may have a pet that is either a Dog or a Cat. This is modeled with the following content types. Copy{ name: "Cat", sys: { id: "cat", ... } } { name: "Dog", sys: { id: "dog", ... } } { name: "Friendly User" sys: { id: "friendly-user", ... }, fields: [ ..., { id: "pet", type: "Link", linkType: "Entry", validations: [{ linkContentType: ["cat", "dog"] }] } ] } This results in the following schema: Copytype Dog { # ... } type Cat { # ... } union FriendlyUserPet = Cat | Dog type FriendlyUser { sys: Sys contentfulMetadata: ContentfulMetadata age: Int name: String addresses: [String] petsCollection: FriendlyUserPetsCollection manager: FriendlyUser # ... pet: FriendlyUserPet } ONE-TO-MANY SINGLE-TYPE RELATIONSHIPS One-to-many relationships are modeled with arrays of links. For example, a FriendlyUser might have multiple friends. Copy{ name: "Friendly User" sys: { id: "friendly-user", ... }, fields: [ ..., { id: "friends", type: "Array", items: { type: "Link", linkType: "Entry", validations: [{ linkContentType: ["friendlyUser"] }] } } ] } In the resulting GraphQL schema the friends field is renamed to friendsCollection and is of a collection type, the same type that is used for top-level collections for the FriendlyUser content type. The field has the same skip and limit arguments as the top-level collection field and the same limits apply. Copytype FriendlyUser { sys: Sys contentfulMetadata: ContentfulMetadata friendsCollection(skip: Int, limit: Int): FriendlyUserCollection # ... } type FriendlyUserCollection { skip: Int! limit: Int! total: Int! items: [FriendlyUser]! } ONE-TO-MANY MULTI-TYPE RELATIONSHIPS As with one-to-one relationships, a collection field can link to entries of different content types. For example, a FriendlyUser can have multiple pets, each of which is either a Dog or a Cat. Copy{ name: "Cat", sys: { id: "cat", ... } } { name: "Dog", sys: { id: "dog", ... } } { name: "Friendly User" sys: { id: "friendly-user", ... }, fields: [ ..., { id: "pets", type: "Array", items: { type: "Link", linkType: "Entry", validations: [{ linkContentType: ["dog", "cat"] }] } } ] } This results in the following schema: Copytype Dog { # ... } type Cat { # ... } union FriendlyUserPetsItem = Cat | Dog type FriendlyUserPetsCollection { skip: Int! limit: Int! total: Int! items: [FriendlyUserPetsItem]! } type FriendlyUser { sys: Sys contentfulMetadata: ContentfulMetadata petsCollection(skip: Int, limit: Int): FriendlyUserPetsCollection # ... } LINKS TO A SPECIFIC ITEM You can retrieve the collection of entries linking to a specific entry (or asset) by using the linkedFrom field in your query. For example, consider a Friendly User content type defined as follows: Copy{ name: "Friendly User" sys: { id: "friendly-user", ... }, fields: [ ..., { id: "photo", type: "Link", linkType: "Asset" }, { id: "pets", type: "Array", items: { type: "Link", linkType: "Entry", validations: [{ linkContentType: ["dog", "cat"] }] } } ] } Friendly User links to the Asset type through the photo field, which is a link to an asset. It also links to the Dog and Cat types through the pets field, which is a list of links to entries, with content types restricted to Dog and Cat. Based on those relationships, a friendlyUserCollection field is generated inside the linkedFrom fields of the Asset, Dog, and Cat types: Copytype Cat { sys: Sys contentfulMetadata: ContentfulMetadata linkedFrom: { friendlyUserCollection: FriendlyUserCollection entryCollection: EntryCollection } name: String # ... } type Dog { sys: Sys contentfulMetadata: ContentfulMetadata linkedFrom: { friendlyUserCollection: FriendlyUserCollection entryCollection: EntryCollection } name: String # ... } type Asset { sys: Sys contentfulMetadata: ContentfulMetadata linkedFrom: { friendlyUserCollection: FriendlyUserCollection entryCollection: EntryCollection } title: String # ... } To retrieve names of all the cats and their owners you can then use the following query: Copyquery { catCollection { items { name linkedFrom { friendlyUserCollection { items { firstName } } } } } } Notice that each linkedFrom field also has a generic entryCollection field. This field is always present and allows you to query for linking entries of all types. If you don't have linkContentType validations defined for your fields, entryCollection is the only way to query for linking entries: Copyquery { catCollection { items { name linkedFrom { entryCollection { items { ... on FriendlyUser { firstName } } } } } } } By default the current locale is used to search entry fields for links to the specific entry or asset. To override this behavior the linkedFrom field accepts an optional allowedLocales argument. Note that this does not change the locale of the entries in the collection. Due to the way GraphQL API treats arrays you can omit brackets if you only need a single locale. Copyquery { catCollection { items { name germanLinks: linkedFrom(allowedLocales: "de-DE") { friendlyUserCollection { items { firstName } } } multilanguageLinks: linkedFrom(allowedLocales: ["de-DE", "en-US"]) { friendlyUserCollection { items { firstName } } } } } } INLINE FRAGMENTS Since every GraphQL API type implements the Entry interface, the content type of the entries can be linked without validation. Copy type Entry { sys: Sys contentfulMetadata: ContentfulMetadata } LINK TO SINGLE ENTRY The relationships are modeled by content type fields that link to at most one entry. For example, each FriendlyUser entry has a manager field that links to one entry of content type FriendlyUser. Copy{ name: "Friendly User" sys: { id: "friendly-user", ... }, fields: [ ..., { id: "manager", type: "Link", linkType: "Entry", } ] } This results in the following schema: Copytype FriendlyUser implements Entry { sys: Sys contentfulMetadata: ContentfulMetadata linkedFrom: FriendlyUserLinkingCollections manager: Entry # ... other fields } To query the manager field to be of type FriendlyUser do the following query: Copyquery { friendlyUser(id: "hans") { manager { ... on FriendlyUser { # some user fields } } } } LINK TO COLLECTION OF ENTITIES The relationships are modeled by content type fields that link to a collection of entities. For example, each FriendlyUser entry has a managers field that links to collection of entries. Copy{ name: "Friendly User" sys: { id: "friendly-user", ... }, fields: [ ..., { id: "managers", type: "Array", items: { type: 'Link', linkType: 'Entry' } } ] } This results in the following schema: Copytype FriendlyUser implements Entry { sys: Sys contentfulMetadata: ContentfulMetadata linkedFrom: FriendlyUserLinkingCollections managersCollection: FriendlyUserManagersCollection # ... other fields } To only get the entries of type FriendlyUser, you can do the following query: Copyquery { friendlyUser(id: "hans") { managersCollection { items { ... on FriendlyUser { # some user fields } } } } } ENTRIES In addition to collections for entries of a specific content type, querying for the generic Entry interface is supported on the root Query type. Copytype Query { entryCollection(skip: Int, limit: Int): EntryCollection } The query above returns the following GraphQL types: Copytype Entry { sys: Sys contentfulMetadata: ContentfulMetadata } type EntryCollection { skip: Int! limit: Int! total: Int! items: [Entry]! } Example: Retrieve entries across content types using the root collection type Copytype Person { sys: Sys contentfulMetadata: ContentfulMetadata surname: String } Copytype Cat { sys: Sys contentfulMetadata: ContentfulMetadata name: String } Copyquery { entryCollection { sys { id } contentfulMetadata { tags { id } } ... on Cat { name } ... on Person { surname } } } ASSETS Assets in Contentful have a predefined schema function. This means that the type for any asset in the GraphQL schema follows the definition below: Copytype Asset { sys: Sys contentfulMetadata: ContentfulMetadata linkedFrom: AssetLinkingCollections title: String description: String contentType: String fileName: String url: String size: Int width: Int? height: Int? } Assets are also supported as root queries. At present, there are two root queries for it: single asset and collection of assets. Copytype Query { # ... asset (id: String!): Asset assetCollection(skip: Int, limit: Int): AssetCollection } The queries above return following GraphQL types: Copytype Asset { sys: Sys contentfulMetadata: ContentfulMetadata linkedFrom: AssetLinkingCollections title: String description: String contentType: String fileName: String url: String size: Int width: Int? height: Int? } type AssetCollection { skip: Int! limit: Int! total: Int! items: [Asset]! } Unlike the CDA, the GraphQL Content API always serves asset URLs with a protocol, defaulting to HTTPS. IMAGE TRANSFORMATIONS The GraphQL Content API exposes a set of image transformation options, such as cropping or resizing. To request image transformations for an asset, you have to pass a transform argument to its url field. For example: Copy{ asset(id: "KTsF62Q4gg60q6WCsWJw8") { title url(transform: { width: 500, height: 300, resizeStrategy: FILL, resizeFocus: BOTTOM, backgroundColor: "rgb:321032", cornerRadius: 100, format: JPG, quality: 90 }) } } Transformation options translate to query string parameters that are appended to the url in the response. The resulting URL endpoints to the transformed version of the image. Copy{ data: { asset: { title: "contentful-team", url: "https://images.ctfassets.net/f8bqpb154z8p/4dgP2U7BeMuk0icguS4qGw/bc9431adf0b4a798b1aee97b2c56aa60/Contentful_team.png?w=500&h=300&q=90&fit=fill&f=bottom&r=100&bg=rgb%3A321032&fm=jpg" } } } Transformation options take no effect when the asset is not an image. WIDTH AND HEIGHT Desired width and height of the image in pixels. Accept values between 1 and 4000. If not defined, default to the original image width and height. QUALITY Desired quality of the image. Used for PNG8, JPG, JPG_PROGRESSIVE and WEBP formats. Accepts percentage values, between 1 and 100. CORNERRADIUS Desired corner radius in pixels. Results in an image with rounded corners (pass -1 for a full circle/ellipse). If not defined, defaults to 0. Uses desired background color as padding color, unless the format is JPG or JPG_PROGRESSIVE and resize strategy is PAD, then defaults to white. RESIZESTRATEGY Desired resize strategy. Accepts the following enum type values: * FIT (default) resizes the image to fit into the specified dimensions. * PAD resizes the image to the specified dimensions, padding the image if needed. Uses desired background color as padding color. * FILL resizes the image to the specified dimensions, cropping the image if needed. * SCALE resizes the image to the specified dimensions, changing the original aspect ratio if needed. * CROP crops a part of the original image to fit into the specified dimensions. * THUMB creates a thumbnail from the image focusing on the focus area RESIZEFOCUS Desired resize focus area. Accepts the following enum type values: * CENTER (default) * TOP, RIGHT, LEFT, BOTTOM. * TOP_RIGHT, TOP_LEFT, BOTTOM_RIGHT, BOTTOM_LEFT. * FACE - focuses on the largest face. * FACES - focuses on the area containing all the faces. It has no effect when used with FIT or SCALE resize strategy. BACKGROUNDCOLOR Desired background color, used with corner radius or PAD resize strategy. Accepts RGB values in rgb:ffffff format. If not defined, defaults to transparent (for PNG, PNG8 and WEBP) or white (for JPG and JPG_PROGRESSIVE). FORMAT Desired image format. Accepts the following enum values: * JPG * JPG_PROGRESSIVE Progressive JPG format stores multiple passes of an image in progressively higher detail. While a progressive image is loading, the viewer will first see a lower quality pixelated version, which will gradually improve in detail, until the image is fully downloaded. This displays the image as early as possible in order to maintain the layout as designed. * PNG * PNG8 8-bit PNG images support up to 256 colors and weigh less than the standard 24-bit PNG equivalent. The 8-bit PNG format is mostly used for simple images, such as icons or logos. * WEBP If not defined, defaults to the original image format. LOCATIONS Locations are represented as types with the properties lat and lon. The GraphQL type looks like: Copytype Location { lat: Float lon: Float } Collections can be filtered on fields with Location type by applying supported filters. RICH TEXT Rich text fields are represented as types with two properties: * json that exposes the actual RichText field value in a JSON format * links that allows you to deeply query various types of referenced entities For example, if the content type Article has a RichText field text, the following types are generated: Copytype Article { text: ArticleText } type ArticleText { json: JSON!, links: ArticleTextLinks! } type ArticleTextLinks { entries: ArticleTextEntries!, assets: ArticleTextAssets! resources: ArticleTextResourceLinks! } type ArticleTextEntries { inline: [Entry]! block: [Entry]! hyperlink: [Entry]! } type ArticleTextAssets { block: [Asset]! hyperlink: [Asset]! } type ArticleTextResourceLinks { block: [ResourceLink!]! } Following is an example of a query for a RichText field value and linked entities: Copyquery { article(id: "some-article") { text { json links { assets { block { title url } } entries { inline { sys { id } ... on Person { name age } } } resources { block { sys { type urn linkType } } } } } } } NEVER The Never field type is used with the Functions feature. This type is assigned to the _data suffixed field when an error occurred during schema generation. For example, when the remote schema cannot be fetched, the _data fields depending on that schema will have the Never type. Field selections on a Never field will always return null, and the error information can be found in the errors array of the response. Note that your Contentful schema can be fetched as it is and will not be impacted by any errors caused by external references. COLLECTION FIELDS Collections of entries and assets are exposed through collection fields in the root query object and in one-to-many relationship fields. For example: Copytype FriendlyUserCollection { skip: Int! limit: Int! total: Int! items: [FriendlyUser]! } input FriendlyUserFilter { # ... field based filters } type Query { # ... friendlyUserCollection( skip: Int limit: Int, where: FriendlyUserFilter ): FriendlyUserCollection } ARGUMENTS The following optional arguments are available when querying a collection: Argument Type Description skip Number zero-indexed offset in the collection from which items are fetched. The default is 0 limit Number maximum number of items to fetch. The default is 100 and the maximum is 1000 where InputType filter specifications to apply on the collection query. For more information see the Collection Filters section order InputType order specifications to apply on the collection query. For more information see the Collection Order section. preview Boolean when set to true the field will be resolved with non published content. The default is false locale String locale for the collection items. If not set the default locale is used. RETURN VALUE The value returned from a collection field contains the meta fields skip, limit and, total and the requested items in the items field. The skip and limit fields corresponds to respective input arguments. The total fields contains the total number of items in that collection. COLLECTION FILTERS The GraphQL Content API allows users to specify filters on root collection queries. Collections could be filtered by different fields or combination of fields that contain collection items. There are general and type specific filters: Filter Postfix Field type equal <any scalar> not equal _not <any scalar> exists _exists <any> contains _contains String, RichText does not contain _not_contains String, RichText greater than _gt Number, Date greater or equals _gte Number, Date less than _lt Number, Date less or equals _lte Number, Date in given list _in String, Number, Date not in given list _not_in String, Number, Date within circle _within_circle Location within rectangle _within_rectangle Location contains all _contains_all Array contains some _contains_some Array contains none _contains_none Array For each content type the schema defines an input type to filter entries of that content type. For example, for the type FriendlyUser structured in the following way: Copytype FriendlyUser { sys: Sys name: String age: Integer } The schema defines the following filter input type: Copyinput FriendlyUserFilter { sys: SysFilter contentfulMetadata: ContentfulMetadataFilter name: String name_not: String name_exists: Boolean name_contains: String # ... more name filters age: Number age_gt: Number age_lt: Number # ... more age filters AND: [FriendlyUserFilter] OR: [FriendlyUserFilter] } Filter inputs can be passed to collection queries of their corresponding type to filter out mutations and the result set. For example, to find all FriendlyUsers whose name is "Frank" or "Francine" and who are older than 30 years, write the following query: Copyquery { friendlyUserCollection(where: { AND: [ { OR: [ { name: "Frank" }, { name: "Francine" } ] }, { age_gt: 30 } ], }) { name age } } LIMITATIONS It is not possible to filter on fields of Type Object or RichText. There's an exemption in the case of the ContentfulMetadata type. _contains filter is case insensitive and must be at least 2 characters long to work. The _contains filter is analogous to the [match] filter in the REST API content. Check the documentation of the [match] operator for more information about the details of full-text search in contentful. For performance reasons it is not recommended to use the _contains filter when searching for slugs or text IDs. Please use the equality search instead. FILTER GENERATION Filter input types are derived from the content model, just like the output types. For each content type, one filter input type is derived. The user can pass it to the corresponding root collection query. Each filter input type has the sys, AND, and OR fields as well as additional field type specific filters for every field. Name of the filter input type is derived from the output type by appending Filter to it. LOGICAL CONNECTIVES Each filter input type has two special fields AND and OR. These fields are used to logically combine filters. If multiple fields are specified on a filter, they get connected with an implicit AND: Copyquery { friendlyUserCollection(where: { OR: [ { name: "Hans" }, { name: "Joe" } ] age_gte: 30, age_lte: 40 }) { name } } And result in the following equivalent query: Copyquery { friendlyUserCollection(where: { AND: [ OR: [ { name: "Hans" }, { name: "Joe" } ], { age_gte: 30 }, { age_lte: 40 } ] }) { name } } Both queries return all the friendly users between the age of 30 to 40 and are named either Hans or Joe. FILTERS BY FIELD TYPE For each field in a content type a set of filter fields is added to the content type’s filter input type. The type of filters is determined by the field type. SYMBOL AND TEXT GraphQL Content API does not distinguish between Symbol and Text types and generates the same filters for both. For example, if the content type FriendlyUser has a Symbol field name, the following types are generated: Copytype FriendlyUser { # ... other fields name: String } input FriendlyUserFilter { # ... other field filters # Matches if the field is equal to the given value name: String # Matches if the field is not equal to the given value name_not: String # Matches if the field exists name_exists: Boolean # Matches if the field value equal one of the given values name_in: [String] # Matches if the field value does not equal any of the given values name_not_in: [String] # Matches if given value is a substring of the the field value name_contains: String # Matches if given value is not a substring of the the field value name_not_contains: String } NUMBER AND INTEGER Filter names for Integer and Number types are same. They only differ in the input types for values. For Integer fields the value type is Int, whereas for Number fields the type is Float. For example, if the content type FriendlyUser has an Integer field age, the following types are generated: Copytype FriendlyUser { # ... other fields age: Int } input FriendlyUserFilter { # ... other field filters # Matches if the field is equal to the given value age: Int # Matches if the field is not equal to the given value age_not: Int # Matches if the field exists age_exists: Boolean # Matches if the field value equal one of the given values age_in: [Int] # Matches if the field value does not equal any of the given values age_not_in: [Int] # Matches if the field value is strictly smaller than the given value age_lt: Int # Matches if the field value is smaller than or equal to the given value age_lte: Int # Matches if the field value is strictly greater than the given value age_gt: Int # Matches if the field value is greater than or equal to the given value age_gte: Int } BOOLEAN Boolean filter accepts values of type Boolean and could be used only on fields with type Boolean. For example, if the content type FriendlyUser has an Boolean field employed, the following types are generated: Copytype FriendlyUser { # ... other fields employed: Boolean } input FriendlyUserFilter { # ... other field filters # Matches if the field is equal to the given value employed: Boolean # Matches if the field is not equal to the given value employed_not: Boolean # Matches if the field exists employed_exists: Boolean } DATE For the fields with type Date the value types are DateTime. The value for filter should be provided full DateTime value in ISO-8601 format eg yyyy-mm-ddThh:mm:ss:sssZ. For example, if the content type FriendlyUser has an DateTime field birthday, the following types are generated: Copytype FriendlyUser { # ... other fields birthday: DateTime } input FriendlyUserFilter { # ... other field filters # Matches if the field is equal to the given value birthday: DateTime # Matches if the field is not equal to the given value birthday_not: DateTime # Matches if the field exists birthday_exists: Boolean # Matches if the field value equal one of the given values birthday_in: [DateTime] # Matches if the field value does not equal any of the given values birthday_not_in: [DateTime] # Matches if the field value is strictly smaller than the given value birthday_lt: DateTime # Matches if the field value is smaller than or equal to the given value birthday_lte: DateTime # Matches if the field value is strictly greater than the given value birthday_gt: DateTime # Matches if the field value is greater than or equal to the given value birthday_gte: DateTime } LOCATION For fields with type Location the value types are either Circle or Rectangle. The Circle scalar type has the following format: Copy{ lat: 10.11, lon: 10.11, radius: 10, } where lat and lon are coordinates of the center of the circle and radius its radius in kilometers. The Rectangle scalar type has the following format: Copy{ topLeftLat: 40, topLeftLon: 13.35, bottomRightLat: 41, bottomRightLon: 14.36 } where topLeftLat with topLeftLon are the coordinates of the top left corner of the rectangle, and bottomRightLat with bottomRightLon are the coordinates of the bottom right corner of the rectangle. For example, if the content type FriendlyUser has an Location field place, the following types are generated: Copytype FriendlyUser { # ... other fields place: Location } input FriendlyUserFilter { # ... other field filters # Matches if the position is inside the given circle place_within_circle: Circle # Matches if the position is inside the given rectangle place_within_rectangle: Rectangle } ARRAY For Array fields with the value type String. The value for the filter should be an array of string values. For example, if the content type FriendlyUser has an Array field nicknames, the following types are generated: Copytype FriendlyUser { # ... other fields nicknames: [String] } input FriendlyUserFilter { # ... other field filters # Matches if the field array contains *all* items provided to the filter nicknames_contains_all: [String] # Matches if the field array contains at least one item provided to the filter nicknames_contains_some: [String] # Matches if the field array doesn't contain any item provided to the filter nicknames_contains_none: [String] } LINK For Link fields with a single linkContentType validation. Filtering depth is limited to one level of relationships. The collection filter input type has a property corresponding to the field name. The type of this input filter property has filters for all the linked fields (without nested Link fields). Copytype FriendlyUser { sys: Sys firstbornChild: Child # ... other fields } type Child { name: String } input FriendlyUserFilter { sys: SysFilter contentfulMetadata: ContentfulMetadataFilter firstbornChild: FriendlyUserFirstbornChildFilter # ... more filters } input FriendlyUserFirstbornChildFilter { sys: SysFilter contentfulMetadata: ContentfulMetadataFilter name: String name_not: String name_exists: Boolean name_contains: String # ... more name filters } SYS FILTERS Every filter input type has a sys property. The type of the sys filter property is the statically defined SysFilter type. Copyinput FriendlyUserFilter { sys: SysFilter # ... other fields } input SysFilter { id: String id_not: String id_in: [String] id_not_in: [String] id_contains: String id_not_contains: String } Similar to other field filters the SysFilter input type is generated from the Sys output type. For each field in the Sys type, a set of corresponding filters are added to SysFilter. The following is an example of a query language for a list of entries by IDs: Copyquery { friendlyUserCollection(where: { sys: { id_in: ["id1", "id2"] } }) { sys { id } } } CONTENTFULMETADATA FILTERS Every filter input type has a contentfulMetadata property. The type of the contentfulMetadata filter property is the statically defined ContentfulMetadataFilter type. Copyinput EntryCollectionFilter { sys: SysFilter contentfulMetadata: ContentfulMetadataFilter } input ContentfulMetadataFilter { tags_exists: Boolean tags: ContentfulMetadataTagsFilter } input ContentfulMetadataTagsFilter { id_contains_some: [String!] id_contains_none: [String!] id_contains_all: [String!] } The ContentfulMetadataFilter input type is generated from the tags field in the ContentfulMetadata type and its id subfield in the ContentfulTag type. The following is an example of a query for a list of entries across content types by tag presence and tag IDs: Copyquery { entryCollection(where: { contentfulMetadata: { tags_exists: true tags: { id_contains_some: ["tagId1", "tagId2"] } } }) { sys { id } contentfulMetadata { tags { id } } } } NESTED COLLECTION FILTERS You can filter a multi reference field collection if the field contains a validation rule that makes it accept only specific content types. If the reference field only accepts a single content type, then you can filter by any field on that content type. Copyquery { friendlyUserCollection { items { firstName catCollection(where: {name: "foorbar"}) { items { name } } } } } On the other hand, if the reference field accepts multiple content types, then you can filter by any field that is common across all of those content types. A field is considered common if it has the same apiName (field id) and type on all content types. Consider you have the following content types: * Cat * field Name: Cat Name, field Id: name, type: text * field Name: Legs, field Id: legs, type: number * field Name: Lives Left, field id: livesLeftOfNine, type: number * Dog * field Name: Dog Name, field Id: name, type: text * field Name: Legs, field Id: legs, type: boolean * field Name: Likes Walks, field id: likesWalks, type: boolean * Person * field Name: Pets, field Id: pets, type: Reference, validations: Accept only specified entry types: Cat, Dog On Person you will be able to query petsCollection by the fields that have the same field id and type on Cat and Dog. Per our content types definition above: the only common field is name (same field id name and type text on both collections). The field legs will not be a common field as it's type differs across the content types. Copyquery { friendlyUserCollection { items { firstName petsCollection(where: {name: "foorbar"}) { items { __typename ... on Cat { name numberOfLivesLeft } ... on Dog { name likesGoingForWalks } } } } } } The petsCollection can be filtered by the fields common to both Cat and Dog types, such as name. It cannot be filtered by fields specific to any one content type, such as livesLeftOfNine or likesGoingForWalks. Note: When you filter a reference field which accepts more than one content type, the complexity of your query increases by the number of content types the field can accept. LINK FILTERING You can filter on Links within Entries. The same logic applies as for nested filtering: your Content Model must include validations specifying the Content Type (or types) for the Link. For example, the following schema can be generated for a content model that contains a Blog Post content type, with the Title and Content fields as strings and a Link to an entry with a validation specifying an Author: Copytype BlogPost { sys: Sys title: String content: String author: Author } type Author { sys: Sys name: String } You can filter on any fields of the author type. For example: Copyquery { blogPostCollection { items { title content author(where: {name: "Blog Post Author"}) { name } } } } If there is a match, then the author will be returned. Otherwise, you will receive a null value. All of the same filters that are available on collections are available on this single link level. COLLECTION ORDER The GraphQL Content API allows users to specify the fields and direction to sort on root collection queries. For example, for the type FriendlyUser structured in the following way: Copytype FriendlyUser { sys: Sys name: String age: Integer } The schema defines the following order input enum type: Copyenum FriendlyUserOrder { name_ASC name_DESC age_ASC age_DESC sys_id_ASC sys_id_DESC } Order enum values can be passed to collection queries of their corresponding type to sort the result set. For example, to find the oldest FriendlyUser, write the following query: Copyquery { friendlyUserCollection(order: [age_DESC], limit: 1) { items { name } } } Collections can be sorted by multiple fields, each of them with a direction information. For example, to order FriendlyUsers by their age (descending) first and for items with same age it should sort by name (ascending), write the following query: Copyquery { friendlyUserCollection(order: [age_DESC, name_ASC]) { items { name age } } } You can order collections in linkedFrom. Copyquery { catCollection { items { name linkedFrom { friendlyUserCollection(order: [age_DESC, name_ASC]) { items { firstName } } } } } } NOTE: You cannot order the entryCollection field. Copyquery { catCollection { items { name linkedFrom { friendlyUserCollection(order: [age_DESC, name_ASC]) { items { firstName } entryCollection { __typename } } } } } } LIMITATIONS It is not possible to order on fields of Type Link, Text, Location, Object, or RichText. Note: When using `allowedLocales`, the order argument that you have passed will not be applied to the fallback values, which might make the result seem to be unordered. DEFAULT ORDERING If you don't pass an explicit order value the returned collection items will be ordered descending by publication timestamp (sys.updatedAt) and ascending by ID (sys.id). This means that recently published items will appear closer to the top, and for those with the same publication timestamp the order will be based on the item IDs. Note that the above default ordering only apples to top level collections. Nested collections are ordered in the same order they were linked to the parent entry. Important: linkedFrom does not have any default ordering or sorting. SINGLE RESOURCE FIELDS When you want to fetch just one resource of a given type, you can use the single resource fields. As explained in the types section, the name of this fields is the camelcased version of the content type from which they derive or asset. Copytype Query { contentModule (id: "introduction") { ... } asset (id: "my-picture") { ... } } ARGUMENTS The following arguments are available when querying a single resource: Argument Type Required Description id String true The id of the resource you want to fetch preview Boolean false when set to true the field will be resolved with non published content. The default is false locale String false locale for the resource. If not set, the default locale is used. AUTOMATIC PERSISTED QUERIES You can use this feature to bypass the 8kb limit on the query size if you are a customer on our Premium plan and above, plus to cache the query in Contentful to decrease the payload delivered through the network. * First, you have to send the query and a sha256Hash value of that query: Copycurl --location --request POST 'https://graphql.contentful.com/content/v1/spaces/{SPACE}/environments/{ENVIRONMENT}' \ --header 'Authorization: Bearer {TOKEN}' \ --header 'Content-Type: application/json' \ --data-raw '{ "query": "{__typename}", "extensions": { "persistedQuery": { "sha256Hash": "ecf4edb46db40b5132295c0291d62fb65d6759a9eedfa4d5d612dd5ec54a6b38", "version": 1 } } }' * Then, you can only send the hash to execute the cached query: Copycurl --location --request POST 'https://graphql.contentful.com/content/v1/spaces/{SPACE}/environments/{ENVIRONMENT}' \ --header 'Authorization: Bearer {TOKEN}' \ --header 'Content-Type: application/json' \ --data-raw '{ "extensions": { "persistedQuery": { "sha256Hash": "ecf4edb46db40b5132295c0291d62fb65d6759a9eedfa4d5d612dd5ec54a6b38", "version": 1 } } }' Note: If you sent a wrong hash you will get a `PersistedQueryMismatch` error. If you sent a hash without caching the query first, you will get a `PersistedQueryNotFound` error. ORDERING NESTED COLLECTIONS You can order any collection if it contains a many reference field with a validation rule that accepts only entries from a single content type. Copyquery { friendlyUserCollection { items { firstName catCollection(order: [name_ASC]) { items { name } } } } } EXTERNAL REFERENCES The External references feature (formerly known as Third party orchestration) enables you to resolve content referenced from any third party system using the Contentful GraphQL API. Some of our marketplace apps already support External references out-of-the-box, such as Shopify, commercetools and Cloudinary. For those that don’t, you can create your own app with Functions to enable the External references capability. FUNCTIONS Functions connect to external systems, fetch additional content and enrich the response of the GraphQL request issued through Contentful's GraphQL API. With functions, you can use _data suffix in your GraphQL query and stitch remote schemas together with your Contentful schema. The _data prefix can be used only when the field is annotated to be resolved in delivery with an app. Once you enable the Resolve content on delivery checkbox on your field settings and you configure your field with a custom app, you can resolve remote content using GraphQL API. Note: This feature is currently available through our Early Access Program (EAP). If your function has an error caused by the remote schema, query or response, you will receive an UNRESOLVABLE_RESOURCE_LINK error. If the schema generation was not successful, the _data suffixed field will be of type Never. EXPLORING THE SCHEMA WITH GRAPHIQL You can explore and inspect the schema of a space using the GraphiQL, an in-browser GraphQL IDE. To open GraphiQL server visit the https://graphql.contentful.com/content/v1/spaces/{SPACE}/explore?access_token={CDA_TOKEN} URL in your browser. You must provide the CDA_TOKEN as a query parameter. GRAPHQL ERRORS The GraphQL Content API responses via GitHub contains errors that occur during the different phases of a request (authentication, validation, schema generation and execution) dependencies. Among these errors there can also be other internal system errors. The errors returned by the GraphQL API follow the GraphQL error spec via GitHub. There is an additional contentful object in the extensions error property with information relevant to the failed request to facilitate debugging and fixing problems. The contentful object contains the following properties: * code: unique error identifier. * requestId: unique request identifier. * details: optional object with details about a specific kind of error. The following is an example of such a response from the API deployment: Copy{ data: { // query data: optional, might be presented in case of partial response queries ... }, errors: [{ message: 'Query execution error. Query too complex to be executed in allocated resources', // Human readable error message locations: [{line: 4, column: 17}], path: ['too', 'many', 'db_ops'], extensions: { contentful: { code: 'RESOURCES_EXHAUSTED', // text error code requestId: 'xxx' // id of current request } } }] } List of known errors: Category HTTP status code Message Is partial* Authentication 401 ACCESS_TOKEN_MISSING no Authentication 401 ACCESS_TOKEN_INVALID no Schema generation 422 COLLIDING_TYPE_NAMES no Schema generation 422 COLLIDING_FIELD_NAMES no Schema generation 422 RESERVED_FIELD_NAME no Validation 400 UNKNOWN_ENVIRONMENT no Validation 400 UNKNOWN_SPACE no Validation 400 MISSING_QUERY no Validation 400 QUERY_TOO_BIG no Validation 400 INVALID_QUERY_FORMAT no Validation 404 PersistedQueryNotFound no Validation 400 PersistedQueryMismatch no Validation 400 INVALID_VARIABLES_FORMAT no Validation 400 TOO_COMPLEX_QUERY no Validation 400 QUERY_OPERATION_NAME_MISMATCH no Query execution 200 UNKNOWN_LOCALE yes Query execution 200 UNRESOLVABLE_LINK yes Query execution 200 UNEXPECTED_LINKED_CONTENT_TYPE yes Query execution 200 UNRESOLVABLE_RESOURCE_LINK yes Query execution 200 RESOURCES_EXHAUSTED yes System errors 200 INTERNAL_SERVER_ERROR yes System errors 500 INTERNAL_SERVER_ERROR no System errors 429 RATE_LIMIT_EXCEEDED no Is partial indicates whether for given error partial data response is possible. For more information, read our tutorials that cover frontend and backend technologies so you can implement GraphQL queries into your application, including languages JavaScript, Android and iOS (requires Apollo). GRAPHQL ERRORS EXPLAINED COLLIDING_TYPE_NAMES The COLLIDING_TYPE_NAMES error is returned when one or more content type IDs are converted to the same GraphQL type name. For more information about this error, see the Colliding type names section. EXAMPLE Copy errors: [{ message: "Schema generation failed. Type name generated for the content types 'A_car', 'a_car_' would be the same for all of them: 'ACar'", extensions: { contentful: { code: 'COLLIDING_TYPE_NAMES', details: { collidingContentTypeIds: ['A_car', 'a_car_'], resultingTypeName: 'ACar', }, documentationUrl: ‘xxxxxx/colliding-type-names requestId: 'xxx' } } }] } SOLUTION To prevent this error, make sure the content type IDs in your space environment cannot result in the same GraphQL type name. You can either enter two unique random IDs in the creation phase, or provide two distinct names that wouldn’t be converted to the same ID or GraphQL type name later on. For more information on how schemas and the type names are generated for your GraphQL schema, see the Schema generation section. To fix this error, recreate one of the content types that have colliding IDs, making sure the new ID won’t collide with the second content type ID. You can also use the scripted approach described in the Scripting migrations with the Contentful CLI guide. COLLIDING_TYPE_NAMES DURING QUERY EXECUTION We dynamically create the types for GraphQL values based off of their names. As a result, users can inadvertently create naming collisions. The following example is a common scenario of how a naming collision can occur: 1. Create the following content types: BlogPost, BlogPostContent and BlogPostMoreContent. 2. Add a reference field called content to your BlogPost content type, and allow it to link to BlogPostContent and BlogPostMoreContent. 3. Create an entry of type BlogPost with its content field linking to an entry of type BlogPostMoreContent. 4. Query the BlogPost entry including the linked entry. A generic error message is returned expecting only entries of type BlogPostContent instead of BlogPostMoreContent. Here is a breakdwon of what is actually happening: When generating a BlogPostContent, we create an API-wide collection called BlogPostContentCollection for querying purposes. However, when generating the content field on a BlogPost, we also need to create a collection to enable querying. Unfortunately, this creates a name collision issue as both collections have the same name, but different types. This conflict can cause various issues in the codebase. In some cases, we are able to prevent schema generation. However, sometimes this occurs at query execution. To fix this, determine what fields are causing a collision and rename one of the conflicting fields. COLLIDING_FIELD_NAMES The COLLIDING_FIELD_NAMES error is returned when several field IDs from the same content type are transformed into the same GraphQL field name. EXAMPLE Copy errors: [ { message: "Schema generation failed. Field name 'firstName' generated for the field 'first_name' in the content type 'brand' collides with an already existing field.", extensions: { contentful: { code: "COLLIDING_FIELD_NAMES", details: { fieldApiName: "first_name", contentTypeId: "brand", fieldName: "firstName" }, documentationUrl: ‘xxxxxx/colliding-field-names requestId: 'xxx' } } } ] } SOLUTION To prevent this error, make sure the field IDs you’re using on each content type cannot result in the same GraphQL field name. To fix this error, change the ID of one of the colliding fields in question using the web app or the Content Management API. RESERVED_FIELD_NAME The RESERVED_FIELD_NAME error is returned when a field ID is transformed into a reserved GraphQL field name. Reserved field names are sys, linkedFrom and contentfulMetadata. EXAMPLE Copy errors: [{ message: "Schema generation failed. Field name 'linkedFrom' generated for the field 'linked_from' in the content type 'blog' is reserved.", extensions: { contentful: { code: 'RESERVED_FIELD_NAME', details: { contentTypeId: 'blog', fieldId: 'sys' }, documentationUrl: ‘xxxxxx/reserved-field-names' requestId: 'xxx' } } }] } SOLUTION To fix this error, change the field ID to a value that does not collide with any of the reserved names using the web app or the Content Management API. UNKNOWN_ENVIRONMENT The UNKNOWN_ENVIRONMNET error is returned when the requested environment does not exist or when the provided authentication token does not allow access to the specified environment. EXAMPLE Copy errors: [{ message: 'Query cannot be executed. Requested environment does not exist in the space', extensions: { contentful: { code: 'UNKNOWN_ENVIRONMENT', details: { availableEnvironments: ['master', 'qa'] }, documentationUrl: ‘xxxxxx/unknown-environment' requestId: 'xxx' } } }] } SOLUTION To fix this error you can: * request an environment from the list of environments that are already enabled for your content delivery token, or * adjust the token so that it has access to the environment you want to use in your query. For more information on how authentication to the Content Delivery API and Content Preview API works and how you can configure them, see the Authentication section of the API reference. UNKNOWN_SPACE The UNKNOWN_SPACE error is returned when the space ID included in the URL is incorrect. EXAMPLE Copy errors: [{ message: 'Query cannot be executed. The space could not be found.', extensions: { contentful: { code: 'UNKNOWN_SPACE', details: { message: 'Check if the space id in the URL is correct.' }, documentationUrl: ‘xxxxxx/unknown-space' requestId: 'xxx' } } }] } SOLUTION To fix this error you can: * request an environment from the list of environments that are already enabled for your content delivery token, or * adjust the token so that it has access to the environment you want to use in your query. For more information on how authentication to the Content Delivery API and Content Preview API works and how you can configure them, see the Authentication section of the API reference. MISSING_QUERY The MISSING_QUERY error is returned when the POST request does not contain a payload or when the GET request does not contain the following query parameter: query. EXAMPLE Copy errors: [{ message: 'Query cannot be executed. The request does not include a query neither in the body nor in the query string', extensions: { contentful: { code: 'MISSING_QUERY', documentationUrl: ‘xxxxxx/missing-query' requestId: 'xxx' } } }] } SOLUTION To fix this error, include a query in the body of a POST request or a query query parameter in the GET request. QUERY_TOO_BIG The QUERY_TOO_BIG error is returned when the query exceeds the maximum allowed size. EXAMPLE Copy errors: [{ message: `Query cannot be executed. The maximum allowed size for a query is XXX bytes but it was YYY bytes`, extensions: { contentful: { code: 'QUERY_TOO_BIG', documentationUrl: ‘xxxxxx/query-too-big' querySizeInBytes: XXX, requestId: 'xxx' } } }] } SOLUTION To fix this error, divide the query into smaller parts to get the information you need in multiple smaller queries. INVALID_QUERY_FORMAT The INVALID_QUERY_FORMAT error is returned when the query is not of type string. EXAMPLE Copy errors: [{ message: "Query cannot be executed. The query is not a string", extensions: { contentful: { code: 'INVALID_QUERY_FORMAT', documentationUrl: ‘xxxxxx/invalid-query-format' requestId: 'xxx' } } }] } SOLUTION To fix this error, make sure the query passed in the request is of type string. INVALID_VARIABLES_FORMAT The INVALID_VARIABLES_FORMAT error is returned when the variables included in the request are not a valid JSON object. EXAMPLE Copy errors: [{ message: "Query cannot be executed. The request variables are not a JSON object", extensions: { contentful: { code: 'INVALID_VARIABLES_FORMAT', documentationUrl: ‘xxxxxx/invalid-variables-format' requestId: 'xxx' } } }] } SOLUTION To fix this error, check the integrity of the variables sent and make sure the JSON object is valid. PERSISTEDQUERYNOTFOUND The PersistedQueryNotFound error is returned when you send a hash for a query that is not cached in our server. EXAMPLE Copy errors: [{ message: "PersistedQueryNotFound", extensions: { contentful: { code: 'PERSISTED_QUERY_NOT_FOUND', documentationUrl: ‘xxxxxx/persisted-query-not-found' requestId: 'xxx' } } }] } SOLUTION To fix this error, make sure you cached the query first by sending the hash and the query in a previous request. PERSISTEDQUERYMISMATCH The PersistedQueryMismatch error is returned when the sha256Hash does not match the expected query hash. EXAMPLE Copy errors: [{ message: "PersistedQueryMismatch", extensions: { contentful: { code: 'PERSISTED_QUERY_MISMATCH', documentationUrl: ‘xxxxxx/persisted-query-mismatch' requestId: 'xxx' } } }] } SOLUTION To fix this error, make sure you hashed the query using the sha256Hash algorithm. TOO_COMPLEX_QUERY Disclaimer: The default complexity limit for collections is 100. The query complexity is calculated as the maximum number of entries and assets a query can potentially return. The TOO_COMPLEX_QUERY error is returned when the calculated query complexity exceeds the maximum complexity allowed. EXAMPLE Copy errors: [{ message: `Query cannot be executed. The maximum allowed complexity for a query is 10000 but it was 20000. Simplify the query e.g. by setting lower limits for collections.`, extensions: { contentful: { code: 'TOO_COMPLEX_QUERY', details: { cost: 10000, maximumCost: 20000 }, documentationUrl: ‘xxxxxx/too-complex-query’ requestId: 'xxx' } } }] } SOLUTION To avoid this issue, simplify the query complexity by setting a lower limit in the GraphQL query. You can also limit the depth of the query. For reference fields, it’s recommended to set a limit on the number of allowed links in the content modeling section. If there is a lower number than the default 1000, it will be used to calculate the overall complexity instead. EXAMPLES OF ACTIONS TO OPTIMIZE A QUERY * Make sure all the collections queried have a limit set on them: Query to avoid Optimized query query { lessonCollection { items { title } } } query { lessonCollection(limit: 20) { items { title } } } * Lower the limits on nested collections in the query to significantly lower the resulting cost: Query to avoid Optimized query query { lessonCollection(limit: 200) { items { title imageCollection { title url } } } } query { lessonCollection(limit: 20) { items { title imageCollection(limit: 10) { title url } } } } * If you know how many entries can be in a specific collection, set the limit to that number or lower: Query to avoid Optimized query query { lessonCollection(limit: 200) { items { title imageCollection(limit: 100) { title url } } } } # if imageCollection contains only 50 entries # then it’s better to lower the limit to 50. query { lessonCollection(limit: 200) { items { title imageCollection(limit: 50) { title url } } } } * If you have the linkedFrom field and you know the exact number of entries you are linking to, set the limit to that number: Query to avoid Optimized query query { catCollection(limit: 20) { items { name linkedFrom { entryCollection { items { ... on FriendlyUser { firstName } } } } } } } # if you know that the number # of entries linked from is 5 # set the limit to 5 query { catCollection(limit: 20) { items { name linkedFrom { entryCollection(limit: 5) { items { ... on FriendlyUser { firstName } } } } } } } * If the query is too deep, fetch the IDs of a nested collection and use a separate query for that collection: Query to avoid Optimized query query { lessonCollection(limit: 200) { items { title teacher { name primaryLessonsCollection(limit: 100) { items { title } } } } } } query { lessonCollection(limit: 200) { items { title teacher { sys { id } } } } } Get all the IDs in teacher.sys.id and use another query: query($teacherIds: [String]) { teacherCollection(where: { sys: { id_in: $teacherIds } } ) { items { name primaryLessonsCollection(limit: 100) { items { title } } } } } QUERY_OPERATION_NAME_MISMATCH The QUERY_OPERATION_NAME_MISMATCH error is returned when a GraphQL request is received without a valid or matching operation name. The server cannot determine which operation to execute based on the provided operation name. The error message includes the received operation name and the available operation names found in the query. EXAMPLE Copy "errors": [ { "message": "Could not determine what operation to execute, received 'blogPostCollectionQuery3' but found 'blogPostCollectionQuery1, blogPostCollectionQuery2'", "extensions": { "contentful": { "code": "QUERY_OPERATION_NAME_MISMATCH", "requestId": "xxx" } } } ] } POSSIBLE CAUSES: * The operation name provided in the GraphQL request does not match any of the operation names defined in the query. * The GraphQL query does not contain any operation names. SOLUTION * Ensure that the operation name provided in the request is spelled correctly and matches one of the operation names defined in the query. * If the GraphQL query does not contain any operation names, make sure to include the operation name when sending the request. UNKNOWN_LOCALE The UNKNOWN_LOCALE error is returned when the requested locale does not exist. EXAMPLE Copy data: { pet: null }, errors: [{ message: "Query execution error. Requested locale 'de-DE' does not exist in the space", locations: [{ line: 0, column: 0 }], path: ['pet'], extensions: { contentful: { code: 'UNKNOWN_LOCALE', details: { availableLocaleCodes: ['en-US', 'es-ES'] }, documentationUrl: ‘xxxxxx/unknown-locale' requestId: 'xxx' } } }] } SOLUTION To fix this error, request one of the available locale codes returned in the error details. For more information about editing a locale, see the Localization with Contentful tutorial. UNRESOLVABLE_LINK The UNRESOLVABLE_LINK error is returned when a link cannot be resolved because the target entity does not exist or it is not published. NOTES: * When a link cannot be resolved, a null value is returned on that field. * When a link in an array cannot be resolved, a null value on its position is returned. * For each link that cannot be resolved, an error object with the details is sent with the response. To distinguish between single entity links and array links, pay attention to the type in the GraphQL schema and the actual GraphQL response. EXAMPLES Copy{ data: { pet: null }, errors: [{ message: "Query execution error. Link to entry 'my-dog' on field 'pet' within type 'Blog' cannot be resolved", locations: [{line: x, column: y}], // whatever path: ['pet'], extensions: { contentful: { code: 'UNRESOLVABLE_LINK', details: { type: 'FriendlyUser', field: 'pet', linkType: 'entry', linkId: 'my-dog' }, documentationUrl: ‘xxxxxx/unresolvable-link', requestId: 'xxx' } } }] } // Array link // Note that we return one error per unresolvable link, almost identical, except by the `path` { data: { pets: [ { name: 'fido' }, null, { name: 'scuby' }, null ] }, errors: [{ message: "Query execution error. Link to entry 'my-dog' on field 'pets' within type 'Blog' cannot be resolved", locations: [{line: x, column: y}], // whatever path: ['pets', 1], extensions: { contentful: { code: 'UNRESOLVABLE_LINK', details: { type: 'FriendlyUser', field: 'pets', linkType: 'entry', linkId: 'my-dog' }, documentationUrl: ‘xxxxxx/unresolvable-link', requestId: 'xxx' } } }, { message: "Query execution error. Link to entry 'my-dog' on field 'pets' within type 'Blog' cannot be resolved", locations: [{line: x, column: y}], // whatever path: ['pets', 2], extensions: { contentful: { code: 'UNRESOLVABLE_LINK', details: { type: 'FriendlyUser', field: 'pets', linkType: 'entry', linkId: 'my-dog' }, documentationUrl: ‘xxxxxx/unresolvable-link', requestId: 'xxx' } } }] } SOLUTION To fix this error, adjust your query to only request entities that exist and are published. Additionally, you can handle this specific error gracefully in your application. SKIP UNRESOLVABLE LINKS You can skip over unresolvable links by filtering where the sys.id_exists is true. NOTE: To use the filter, you must have a validation rule set on the many reference field that makes it only accept one content type. Copyquery { friendlyUserCollection { items { firstName catCollection(limit: 100, where:{sys:{id_exists:true}}) { items { name } } } } } UNEXPECTED_LINKED_CONTENT_TYPE The UNEXPECTED_LINKED_CONTENT_TYPE error is returned when the linked entry has an unexpected content type linked to it in the validations. This happens when a validation in a field is changed to disallow a specific content type that was previously allowed, while entries with links to that content type still exist. EXAMPLE Copy { message: "Query execution error. Link from entry 'blog-1' to entry 'Tom' on field 'externalAuthor' within type 'Blog' returned an unexpected content type", locations: [{ line: 4, column: 13 }], path: ['blog', 'externalAuthor'], extensions: { contentful: { code: 'UNEXPECTED_LINKED_CONTENT_TYPE', details: { type: 'Blog', field: 'externalAuthor', entryId: 'Tom', contentType: 'person', permittedContentTypes: ['someOtherContentType'], linkingEntryId: 'blog-1', }, documentationUrl: ‘xxxxxx/unexpected-linked-content-type', requestId: someRequestId, }, }, }, ] SOLUTION To fix this error, you can remove the links to entries to content types that aren’t allowed anymore, or adjust the allowed content types in the linked entry. RESOURCES_EXHAUSTED The RESOURCES_EXHAUSTED error is returned when the GraphQL query has used more resources for its execution than allowed. EXAMPLE Copy data: { too: { name: 'Josh', age: 22, many: { db_ops: null, } } }, errors: [{ message: 'Query execution error. Query too complex to be executed in allocated resources', locations: [{ line: 4, column: 17 }], // Whatever path: ['too', 'many', 'db_ops'], extensions: { contentful: { code: 'RESOURCES_EXHAUSTED', documentationUrl: ‘xxxxxx/unresolvable-link', requestId: 'xxx' } } }] } SOLUTION To fix this error, split the query into multiple simple queries. UNRESOLVABLE_RESOURCE_LINK The UNRESOLVABLE_RESOURCE_LINK error is returned when an External references or Functions query fails. EXAMPLE Copy { "message": "Query execution error. 'vendorId' link cannot be resolved", "extensions": { "contentful": { "code": "UNRESOLVABLE_RESOURCE_LINK", "documentationUrl": "xxxxxx/unresolvable-resource-link", "requestId": "xxx", "details": { "app": "vendorId" } } }, "locations": [ { "line": 4, "column": 17 } ], "path": ["contentTypeId", "fieldId"] } ] SOLUTION To fix this error, you need to check your Third party data query and your entry that is linked to your app. ALL TOPICS Learn more at Contentful.com CONCEPTS * API basics * App Framework * Domain model * Data model * Entry and asset links * Images * Content localization through locales * Sync API * Multiple environments * Environment Aliases * Environment support for Cross-space references * Environments and environment aliases best practices * Webhooks * Filter API results with relational queries * What is rich text? * External references * Continuous integration and deployment pipelines TUTORIALS * General * CLI * JavaScript * PHP * Android * iOS * Java * Python * Ruby * .NET PLATFORMS * JavaScript * PHP * Android * iOS * Java * Python * Ruby * .NET API REFERENCE * Content Delivery API * Content Management API * Content Preview API * Images API * GraphQL Content API * User Management API * SCIM API * Authentication * Errors * HTTP details * App SDK reference EXTENSIBILITY * App Framework * Field editors * OAuth WEBHOOKS * Overview * Content events * Action events * Configuring a webhook * List webhooks in a space * Activity log * Webhook Templates * Request Verification INFRASTRUCTURE * Multi-region delivery infrastructure (MRDI) * Advanced caching * EU data residency EXPERIENCES * What are Experiences? * Set up Experiences SDK * Register custom components * Component definition schema * Built-in styles * Design tokens * Data structures * Error handling * Image optimization * Using Experiences with NextJS COMPOSE * What is Compose? * Customizable Compose content model * Page types * Known Limitations - Compose * Upgrade to customizable Compose content model * Content model best practices for Compose * Extending and customizing Compose * Roles and Permissions for Compose * CLI tools and Compose * Building a website with Compose in Next.js * Frequently Asked Questions * Documentation for editors * Legacy content model TOOLS AND PLUGINS * Space management * Static site generators * Automation and developer workflows * Command-line interface (CLI) * AI Content Type Generator LEARN MORE SupportGet started WEB APP * Contentful overview * Modeling basics * Creating a digital lookbook * Localization * Versioning * Roles and permissions ADVANCED * Webhooks * CMS as code * Headless & Decoupled CMS MORE * Changelog * API Changes * Technical limits * Code of Conduct * Support * Stack Overflow • All Systems Operational