dotansimha

"""
creates a virtual field on the entity that may be queried but cannot be set manually through the mappings API.
"""
directive @derivedFrom(field: String!) on FIELD_DEFINITION

"""
Marks the GraphQL type as indexable entity.  Each type that should be an entity is required to be annotated with this directive.
"""
directive @entity on OBJECT

dotansimha

async function fetchGraphQL<TResult, TVariables>(
    operation: TypedDocumentNode<TResult, TVariables>,
    ...[variables]: TVariables extends Record<string, never> ? [] : [TVariables]
  ): Promise<TResult> {
    const response = await fetch("http://MY-SERVER/graphql", {
      headers: {
        'Content-Type': 'application/json',
         Accept: 'application/json',
      },
      method: 'POST',

dotansimha

schema: PATH_OR_URL_TO_SCHEMA
documents: GLOB_EXPRESSION_FOR_OPERATIONS
generates:
  ./src/types.ts:
    plugins:
      - typescript
      - typescript-operations

dotansimha

codegen/_graphql.tsx:
  plugins:
    - 'typescript'
    - 'typescript-operations'
    - 'typescript-resolvers':
        avoidOptionals: false
    - 'typescript-react-apollo'
  config:
    withHooks: true
    hooksImportFrom: '@apollo/react-hooks'

dotansimha

overwrite: true
schema: schema.graphql
documents: "documents/*.graphql"
generates:
  generated/components.tsx:
    plugins:
      - typescript
      - typescript-operations
      - typescript-react-apollo

dotansimha

{
  "name": "java-app",
  "scripts": {
    "postinstall": "graphql-codegen"
  },
  "dependencies": {
    "graphql": "14.2.1",
    "@graphql-codegen/cli": "1.2.2-beta.0",
    "@graphql-codegen/java-resolvers": "1.2.2-beta.0"
  }

dotansimha

package com.java.generated;

import com.myapp.models.UserModel;
import com.myapp.models.ChatModel;
import com.myapp.models.BaseModel;
import graphql.schema.TypeResolver;
import graphql.schema.DataFetcher;

public class Resolvers {
  public interface Chat {

dotansimha

schema: src/app/resources/schema.graphql
generates:
  src/app/graphql/generated/Resolvers.java:
    plugins:
      - java-resolvers
    config:
      mappers:
        User: com.myapp.models.UserModel#UserModel
        Chat: com.myapp.models.ChatModel#ChatModel
        Node: com.myapp.models.BaseModel#BaseModel

dotansimha

package com.java.generated;

import graphql.schema.TypeResolver;
import graphql.schema.DataFetcher;

public class Resolvers {
  public interface Chat {
    public DataFetcher<Object> id();
    public DataFetcher<Iterable<Object>> users();
    public DataFetcher<String> title();

dotansimha

type Query {
  me: User!
}

interface Node {
  id: ID!
}

type User implements Node {
  id: ID!