Typescript Apollo Nextjs

Usage Requirements

In order to use this GraphQL Codegen plugin, please make sure that you have GraphQL operations (query / mutation / subscription and fragment) set as documents: ... in your codegen.yml.

Without loading your GraphQL operations (query, mutation, subscription and fragment), you won't see any change in the generated output.

This plugin generates:

  • a function running an ApolloClient query and cache extraction, to be used inside getServerSideProps or getStaticProps
  • a React Apollo HOC running an ApolloClient query consuming the InMemory cache
  • an interface for the React component wrapped by the HOC

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

Motivations

Nextjs recently introduced getServerSideProps and getStaticProps which doesn't allow to use the HOC pattern adopted by the official apollo graphql plugin (based on getInitialProps). At the same time the SSR method offered by apollo client (getDataFromTree ) enforces the react app to render multiple times in order to collect and fetch all the relevant queries. By declaring a top level query we can save rendering time and provide a simpler pattern which works with getServerSideProps. Note that this pattern requires each SSR query to run at top level. Example

Installation

Using yarn
$ yarn add -D graphql-codegen-apollo-next-ssr

API Reference

apolloReactCommonImportFrom

type: string default: "

Customize the package where apollo-react common lib is loaded from.

apolloImportFrom

type: string default: "

Customize the package where apollo-client lib is loaded from.

apolloCacheImportFrom

type: string default: "

Customize the package where apollo-cache-inmemory lib is loaded from.

apolloReactHooksImportFrom

type: string default: "

Customize the package where apollo-react hooks lib is loaded from.

reactApolloVersion

type: number (values: 2, 3) default: 2

Sets the version of react-apollo.

Usage Examples

generates:
path/to/file.ts:
plugins:
- typescript
- typescript-operations
- typescript-react-apollo
config:
reactApolloVersion: 3

withHOC

type: boolean default: true

Customized the output by enabling/disabling the HOC.

Usage Examples

generates:
path/to/file.ts:
plugins:
- typescript
- typescript-operations
- typescript-react-apollo
config:
withHOC: false

withHooks

type: boolean default: false

Customized the output by enabling/disabling the generated React Hooks.

Usage Examples

generates:
path/to/file.ts:
plugins:
- typescript
- typescript-operations
- typescript-react-apollo
config:
withHooks: false

excludePatterns

type: string default: ''

Regexp to exclude a certain operation name.

excludePatternsOptions

type: string default: ''

Regexp options to exclude a certain operation name.

pre

type: string default: ''

Add custom code before each operation.

post

type: string default: ''

Add custom code after each operation.

customImports

type: string default: ''

Add custom imports needed by pre/post.

gqlImport

type: string default: gql#graphql-tag

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
config:
gqlImport: graphql.macro#gql
Gatsby
config:
gqlImport: gatsby#graphql

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: ``

Adds a suffix to generated operation result type names

documentVariablePrefix

type: string default: ``

Changes the GraphQL operations variables prefix.

documentVariableSuffix

type: string default: Document

Changes the GraphQL operations variables suffix.

fragmentVariablePrefix

type: string default: ``

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

importOperationTypesFrom

type: string default: ``

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: ``

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

config:
documentMode: external
importDocumentNodeExternallyFrom: path/to/document-node-file
config:
documentMode: external
importDocumentNodeExternallyFrom: near-operation-file

scalars

type: ScalarsMap

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

Usage Examples

config:
scalars:
DateTime: Date
JSON: "{ [key: string]: any }"

namingConvention

type: NamingConvention default: pascal-case#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 preserves underscores.

Usage Examples

Override All Names
config:
namingConvention: lower-case#lowerCase
Upper-case enum values
config:
namingConvention:
typeNames: pascal-case#pascalCase
enumValues: upper-case#upperCase
Keep names as is
config:
namingConvention: keep
Remove Underscores
config:
namingConvention:
typeNames: pascal-case#pascalCase
transformUnderscore: true

typesPrefix

type: string default: ``

Prefixes all the generated types.

Usage Examples

config:
typesPrefix: 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