TypeScript Apollo Angular

Package name	Weekly Downloads	Version	License	Updated
@graphql-codegen/typescript-apollo-angular (opens in a new tab)				Jul 22nd, 2023

Installation

pnpm add -D @graphql-codegen/typescript-apollo-angular

This plugin generates Apollo services (Query, Mutation and Subscription) with TypeScript typings.

It will generate a strongly typed Angular service for every defined query, mutation or subscription. The generated Angular services are ready to inject and use within your Angular component.

It extends the basic TypeScript plugins: @graphql-codegen/typescript, @graphql-codegen/typescript-operations - and thus shares a similar configuration.

To shed some more light regards this template, it's recommended to go through this article: https://apollo-angular.com/docs/get-started (opens in a new tab), and to read the Code Generation with Apollo Angular: https://the-guild.dev/blog/apollo-angular-12 (opens in a new tab)

Config API Reference

apolloAngularVersion

type: number default: 2

Version of apollo-angular package

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         apolloAngularVersion: 1
       },
     },
   },
 };
 export default config;

ngModule

type: string

Allows to define ngModule as part of the plugin's config so it's globally available.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         ngModule: './path/to/module#MyModule'
       },
     },
   },
 };
 export default config;

namedClient

type: string

Defined the global value of namedClient.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         namedClient: 'customName'
       },
     },
   },
 };
 export default config;

serviceName

type: string

Defined the global value of serviceName.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         serviceName: 'MySDK'
       },
     },
   },
 };
 export default config;

serviceProvidedInRoot

type: boolean

Defined the global value of serviceProvidedInRoot.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         serviceProvidedInRoot: false
       },
     },
   },
 };
 export default config;

serviceProvidedIn

type: string

Define the Injector of the SDK class.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         serviceProvidedIn: './path/to/module#MyModule'
       },
     },
   },
 };
 export default config;

sdkClass

type: boolean default: false

Set to true in order to generate a SDK service class that uses all generated services.

querySuffix

type: string default: GQL

Allows to define a custom suffix for query operations.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         querySuffix: 'QueryService'
       },
     },
   },
 };
 export default config;

mutationSuffix

type: string default: GQL

Allows to define a custom suffix for mutation operations.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         mutationSuffix: 'MutationService'
       },
     },
   },
 };
 export default config;

subscriptionSuffix

type: string default: GQL

Allows to define a custom suffix for Subscription operations.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         subscriptionSuffix: 'SubscriptionService'
       },
     },
   },
 };
 export default config;

apolloAngularPackage

type: string default: 'apollo-angular'

Allows to define a custom Apollo-Angular package to import types from.

additionalDI

type: string[] default: ``

Add additional dependency injections for generated services

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         additionalDI: ['testService: TestService', 'testService1': TestService1']
       },
     },
   },
 };
 export default config;

addExplicitOverride

type: boolean default: false

Add override modifier to make the generated code compatible with the noImplicitOverride option of Typescript v4.3+.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       plugins: ['apollo-angular'],
       config: {
         addExplicitOverride: true
       },
     },
   },
 };
 export default config;

noGraphQLTag

type: boolean default: false

Deprecated. Changes the documentMode to documentNode.

gqlImport

type: string default: graphql-tag#gql

Customize from which module will gql be imported from. This is useful if you want to use modules other than graphql-tag, e.g. graphql.macro.

Usage Examples

graphql.macro

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         gqlImport: 'graphql.macro#gql'
       },
     },
   },
 };
 export default config;

Gatsby

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         gqlImport: 'gatsby#graphql'
       },
     },
   },
 };
 export default config;

documentNodeImport

type: string default: graphql#DocumentNode

Customize from which module will DocumentNode be imported from. This is useful if you want to use modules other than graphql, e.g. @graphql-typed-document-node.

noExport

type: boolean default: false

Set this configuration to true if you wish to tell codegen to generate code with no export identifier.

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.

operationResultSuffix

type: string default: (empty)

Adds a suffix to generated operation result type names

documentVariablePrefix

type: string default: (empty)

Changes the GraphQL operations variables prefix.

documentVariableSuffix

type: string default: Document

Changes the GraphQL operations variables suffix.

fragmentVariablePrefix

type: string default: (empty)

Changes the GraphQL fragments variables prefix.

fragmentVariableSuffix

type: string default: FragmentDoc

Changes the GraphQL fragments variables suffix.

documentMode

type: DocumentMode default: graphQLTag

Declares how DocumentNode are created:

• graphQLTag: graphql-tag or other modules (check gqlImport) will be used to generate document nodes. If this is used, document nodes are generated on client side i.e. the module used to generate this will be shipped to the client
• documentNode: document nodes will be generated as objects when we generate the templates.
• documentNodeImportFragments: Similar to documentNode except it imports external fragments instead of embedding them.
• external: document nodes are imported from an external file. To be used with importDocumentNodeExternallyFrom

Note that some plugins (like typescript-graphql-request) also supports string for this parameter.

optimizeDocumentNode

type: boolean default: true

If you are using documentNode: documentMode | documentNodeImportFragments, you can set this to true to apply document optimizations for your GraphQL document. This will remove all "loc" and "description" fields from the compiled document, and will remove all empty arrays (such as directives, arguments and variableDefinitions).

importOperationTypesFrom

type: string default: (empty)

This config is used internally by presets, but you can use it manually to tell codegen to prefix all base types that it's using. This is useful if you wish to generate base types from typescript-operations plugin into a different file, and import it from there.

importDocumentNodeExternallyFrom

type: string default: (empty)

This config should be used if documentMode is external. This has 2 usage:

• any string: This would be the path to import document nodes from. This can be used if we want to manually create the document nodes e.g. Use graphql-tag in a separate file and export the generated document

• 'near-operation-file': This is a special mode that is intended to be used with near-operation-file preset to import document nodes from those files. If these files are .graphql files, we make use of webpack loader.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         documentMode: 'external',
         importDocumentNodeExternallyFrom: 'path/to/document-node-file',
       },
     },
   },
 };
 export default config;

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         documentMode: 'external',
         importDocumentNodeExternallyFrom: 'near-operation-file',
       },
     },
   },
 };
 export default config;

pureMagicComment

type: boolean default: false

This config adds PURE magic comment to the static variables to enforce treeshaking for your bundler.

experimentalFragmentVariables

type: boolean default: false

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

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

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         strictScalars: true,
       },
     },
   },
 };
 export default config;

defaultScalarType

type: string default: any

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

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         defaultScalarType: 'unknown'
       },
     },
   },
 };
 export default config;

scalars

type: ScalarsMap

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

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         scalars: {
           DateTime: 'Date',
           JSON: '{ [key: string]: any }',
         }
       },
     },
   },
 };
 export default config;

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 (opens in a new tab)

Usage Examples

Override All Names

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         namingConvention: 'change-case-all#lowerCase',
       },
     },
   },
 };
 export default config;

Upper-case enum values

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         namingConvention: {
           typeNames: 'change-case-all#pascalCase',
           enumValues: 'change-case-all#upperCase',
         }
       },
     },
   },
 };
 export default config;

Keep names as is

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
        namingConvention: 'keep',
       },
     },
   },
 };
 export default config;

Remove Underscores

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         namingConvention: {
           typeNames: 'change-case-all#pascalCase',
           transformUnderscore: true
         }
       },
     },
   },
 };
 export default config;

typesPrefix

type: string default: (empty)

Prefixes all the generated types.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         typesPrefix: 'I',
       },
     },
   },
 };
 export default config;

typesSuffix

type: string default: (empty)

Suffixes all the generated types.

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         typesSuffix: 'I',
       },
     },
   },
 };
 export default config;

skipTypename

type: boolean default: false

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

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         skipTypename: true
       },
     },
   },
 };
 export default config;

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

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         nonOptionalTypename: true
       },
     },
   },
 };
 export default config;

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

Usage Examples

 import type { CodegenConfig } from '@graphql-codegen/cli';
 
 const config: CodegenConfig = {
   // ...
   generates: {
     'path/to/file': {
       // plugins...
       config: {
         useTypeImports: true
       },
     },
   },
 };
 export default config;

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: string 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).

emitLegacyCommonJSImports

type: boolean default: true

Emit legacy common js imports. Default it will be true this way it ensure that generated code works with non-compliant bundlers (opens in a new tab).

How to use?

Simply create a .graphql file and write a random query like so:

query MyFeed {
  feed {
    id
    commentCount
  }
}

Using graphql-codegen you can generate a file with Angular services that you can use when coding an Angular component:

import type { CodegenConfig } from '@graphql-codegen/cli'
 
const config: CodegenConfig = {
  // ...
  generates: {
    'path/to/output.ts': {
      plugins: ['typescript', 'typescript-operations', 'typescript-apollo-angular']
    }
  }
}
export default config

Then, use it:

import { MyFeedGQL, MyFeedQuery } from './graphql'
// BE SURE TO USE Observable from rxjs and not from @apollo/client/core when using map
import { Observable } from 'rxjs'
import { map } from 'rxjs/operators'
 
@Component({
  selector: 'feed',
  template: `
    <h1>Feed:</h1>
    <ul>
      <li *ngFor="let item of feed | async">{{ item.id }}</li>
    </ul>
  `
})
export class FeedComponent {
  feed: Observable<MyFeedQuery['feed']>
 
  constructor(feedGQL: MyFeedGQL) {
    this.feed = feedGQL.watch().valueChanges.pipe(map(result => result.data.feed))
  }
}

@NgModule directive

All generated services are defined with @Injectable({ providedIn: 'root' }) and in most cases you don't need to overwrite it, because providing a service to the root injector is highly recommended. To customize that behavior you can use @NgModule directive, anywhere in an operation, to let the codegen know which injector should it use to create a service.

query feed {
  feed @NgModule(module: "./feed/feed.module#FeedModule") {
    id
    title
  }
}

@namedClient directive

Sometimes you end up with multiple Apollo clients, which means part of operations can't use the defaults. In order to customize that behavior you simply attach the @namedClient directive and the typescript-apollo-angular plugin takes care of the rest.

query feed {
  feed @namedClient(name: "custom") {
    id
    title
  }
}