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GraphQL Code Generator

Generate anything from GraphQL schema / operations!

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Flow Operations

yarn add @graphql-codegen/flow-operations

This plugin generates Flow types based on your GraphQLSchema and your GraphQL operations and fragments.

It generates types for your GraphQL documents: Query, Mutation, Subscription and Fragment.

This plugin requires you to use @graphql-codegen/flow as well, because it depends on its types.

Config API Reference#

useFlowExactObjects

type: boolean default: true

Generates Flow types as Exact types.

Usage Examples#

generates: path/to/file.ts: plugins: - flow config: useFlowExactObjects: false

useFlowReadOnlyTypes

type: boolean default: false

Generates read-only Flow types

Usage Examples#

generates: path/to/file.ts: plugins: - flow config: useFlowReadOnlyTypes: true

flattenGeneratedTypes

type: boolean default: false

Flatten fragment spread and inline fragments into a simple selection set before generating.

Usage Examples#

generates: path/to/file.ts: plugins: - typescript - typescript-operations config: flattenGeneratedTypes: true

preResolveTypes

type: boolean default: true

Uses primitive types where possible. Set to false in order to use Pick and take use the types generated by typescript plugin.

Usage Examples#

plugins config: preResolveTypes: false

skipTypeNameForRoot

type: boolean default: false

Avoid adding __typename for root types. This is ignored when a selection explicitly specifies __typename.

Usage Examples#

plugins config: skipTypeNameForRoot: true

globalNamespace

type: boolean default: false

Puts all generated code under global namespace. Useful for Stencil integration.

Usage Examples#

plugins config: globalNamespace: true

operationResultSuffix

type: string default: (empty)

Adds a suffix to generated operation result type names

dedupeOperationSuffix

type: boolean default: false

Set this configuration to true if you wish to make sure to remove duplicate operation name suffix.

omitOperationSuffix

type: boolean default: false

Set this configuration to true if you wish to disable auto add suffix of operation name, like Query, Mutation, Subscription, Fragment.

exportFragmentSpreadSubTypes

type: boolean default: false

If set to true, it will export the sub-types created in order to make it easier to access fields declared under fragment spread.

experimentalFragmentVariables

type: boolean default: false

If set to true, it will enable support for parsing variables on fragments.

mergeFragmentTypes

type: boolean default: false

If set to true, merge equal fragment interfaces.

addUnderscoreToArgsType

type: boolean

Adds _ to generated Args types in order to avoid duplicate identifiers.

Usage Examples#

With Custom Values#
config: addUnderscoreToArgsType: true

enumValues

type: EnumValuesMap

Overrides the default value of enum values declared in your GraphQL schema. You can also map the entire enum to an external type by providing a string that of module#type.

declarationKind

type: DeclarationKindConfig | string (values: abstract class, class, interface, type)

Overrides the default output for various GraphQL elements.

Usage Examples#

Override all declarations#
config: declarationKind: 'interface'
Override only specific declarations#
config: declarationKind: type: 'interface' input: 'interface'

enumPrefix

type: boolean default: true

Allow you to disable prefixing for generated enums, works in combination with typesPrefix.

Usage Examples#

Disable enum prefixes#
config: typesPrefix: I enumPrefix: false

fieldWrapperValue

type: string default: T

Allow you to add wrapper for field type, use T as the generic value. Make sure to set wrapFieldDefinitions to true in order to make this flag work.

Usage Examples#

Allow Promise#
generates: path/to/file.ts: plugins: - typescript config: wrapFieldDefinitions: true fieldWrapperValue: T | Promise<T>

wrapFieldDefinitions

type: boolean default: false

Set to true in order to wrap field definitions with FieldWrapper. This is useful to allow return types such as Promises and functions.

Usage Examples#

Enable wrapping fields#
generates: path/to/file.ts: plugins: - typescript config: wrapFieldDefinitions: true

onlyEnums

type: boolean default: false

This will cause the generator to emit types for enums only

Usage Examples#

Override all definition types#
generates: path/to/file.ts: plugins: - typescript config: onlyEnums: true

onlyOperationTypes

type: boolean default: false

This will cause the generator to emit types for operations only (basically only enums and scalars)

Usage Examples#

Override all definition types#
generates: path/to/file.ts: plugins: - typescript config: onlyOperationTypes: true

ignoreEnumValuesFromSchema

type: boolean default: false

This will cause the generator to ignore enum values defined in GraphQLSchema

Usage Examples#

Ignore enum values from schema#
generates: path/to/file.ts: plugins: - typescript config: ignoreEnumValuesFromSchema: true

wrapEntireFieldDefinitions

type: boolean default: true

Set to true in order to wrap field definitions with EntireFieldWrapper. This is useful to allow return types such as Promises and functions for fields. Differs from wrapFieldDefinitions in that this wraps the entire field definition if i.e. the field is an Array, while wrapFieldDefinitions will wrap every single value inside the array.

entireFieldWrapperValue

type: string default: T | Promise<T> | (() => T | Promise<T>)

Allow to override the type value of EntireFieldWrapper. This wrapper applies outside of Array and Maybe unlike fieldWrapperValue, that will wrap the inner type.

directiveArgumentAndInputFieldMappings

type: DirectiveArgumentAndInputFieldMappings

Replaces a GraphQL scalar with a custom type based on the applied directive on an argument or input field.

You can use both module#type and module#namespace#type syntax. Will NOT work with introspected schemas since directives are not exported. Only works with directives on ARGUMENT_DEFINITION or INPUT_FIELD_DEFINITION.

WARNING: Using this option does only change the type definitions.

For actually ensuring that a type is correct at runtime you will have to use schema transforms (e.g. with @graphql-tools/utils mapSchema) that apply those rules! Otherwise, you might end up with a runtime type mismatch which could cause unnoticed bugs or runtime errors.

Please use this configuration option with care!

directiveArgumentAndInputFieldMappingTypeSuffix

type: string

Adds a suffix to the imported names to prevent name clashes.

Usage Examples#

plugins: config: directiveArgumentAndInputFieldMappingTypeSuffix: Model

strictScalars

type: boolean default: false

Makes scalars strict.

If scalars are found in the schema that are not defined in scalars an error will be thrown during codegen.

Usage Examples#

config: strictScalars: true

defaultScalarType

type: string default: any

Allows you to override the type that unknown scalars will have.

Usage Examples#

config: defaultScalarType: unknown

scalars

type: ScalarsMap

Extends or overrides the built-in scalars and custom GraphQL scalars to a custom type.

namingConvention

type: NamingConvention default: change-case-all#pascalCase

Allow you to override the naming convention of the output. You can either override all namings, or specify an object with specific custom naming convention per output. The format of the converter must be a valid module#method. Allowed values for specific output are: typeNames, enumValues. You can also use "keep" to keep all GraphQL names as-is. Additionally, you can set transformUnderscore to true if you want to override the default behavior, which is to preserve underscores.

Available case functions in change-case-all are camelCase, capitalCase, constantCase, dotCase, headerCase, noCase, paramCase, pascalCase, pathCase, sentenceCase, snakeCase, lowerCase, localeLowerCase, lowerCaseFirst, spongeCase, titleCase, upperCase, localeUpperCase and upperCaseFirst See more

typesPrefix

type: string default: (empty)

Prefixes all the generated types.

Usage Examples#

config: typesPrefix: I

typesSuffix

type: string default: (empty)

Suffixes all the generated types.

Usage Examples#

config: typesSuffix: I

skipTypename

type: boolean default: false

Does not add __typename to the generated types, unless it was specified in the selection set.

Usage Examples#

config: skipTypename: true

nonOptionalTypename

type: boolean default: false

Automatically adds __typename field to the generated types, even when they are not specified in the selection set, and makes it non-optional

Usage Examples#

config: nonOptionalTypename: true

useTypeImports

type: boolean default: false

Will use import type {} rather than import {} when importing only types. This gives compatibility with TypeScript's "importsNotUsedAsValues": "error" option

dedupeFragments

type: boolean default: false

Removes fragment duplicates for reducing data transfer. It is done by removing sub-fragments imports from fragment definition Instead - all of them are imported to the Operation node.

inlineFragmentTypes

type: InlineFragmentTypeOptions default: inline

Whether fragment types should be inlined into other operations. "inline" is the default behavior and will perform deep inlining fragment types within operation type definitions. "combine" is the previous behavior that uses fragment type references without inlining the types (and might cause issues with deeply nested fragment that uses list types).

Package Details