Federation v2 (#189)

examples/federation-v2/graphql-gateway/src/app.module.ts

@@ -0,0 +1,23 @@
+import { IntrospectAndCompose } from '@apollo/gateway'
+import { ApolloGatewayDriver, ApolloGatewayDriverConfig } from '@nestjs/apollo'
+import { Module } from '@nestjs/common'
+import { GraphQLModule } from '@nestjs/graphql'
+
+@Module({
+  imports: [
+    GraphQLModule.forRoot<ApolloGatewayDriverConfig>({
+      driver: ApolloGatewayDriver,
+      gateway: {
+        supergraphSdl: new IntrospectAndCompose({
+          subgraphs: [
+            { name: 'todo-items', url: 'http://localhost:3001/graphql' },
+            { name: 'sub-tasks', url: 'http://localhost:3002/graphql' },
+            { name: 'tags', url: 'http://localhost:3003/graphql' },
+            { name: 'user', url: 'http://localhost:3004/graphql' }
+          ]
+        })
+      }
+    })
+  ]
+})
+export class AppModule {}

examples/federation-v2/graphql-gateway/src/main.ts

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+import { ValidationPipe } from '@nestjs/common'
+import { NestFactory } from '@nestjs/core'
+
+import { AppModule } from './app.module'
+
+async function bootstrap(): Promise<void> {
+  const app = await NestFactory.create(AppModule)
+
+  app.useGlobalPipes(
+    new ValidationPipe({
+      transform: true,
+      whitelist: true,
+      forbidNonWhitelisted: true,
+      skipMissingProperties: false,
+      forbidUnknownValues: true
+    })
+  )
+
+  await app.listen(3000)
+}
+
+// eslint-disable-next-line no-void
+void bootstrap()

examples/federation-v2/sub-task-graphql/e2e/__fixtures__/graphql-fragments.ts

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+export const todoItemFields = `
+    id
+  `
+
+export const subTaskFields = `
+id
+title
+description
+completed
+todoItemId
+`
+
+export const pageInfoField = `
+pageInfo{
+  hasNextPage
+  hasPreviousPage
+  startCursor
+  endCursor
+}
+`
+
+export const edgeNodes = (fields: string): string => `
+  edges {
+    node{
+      ${fields}    
+    }
+    cursor
+  }  
+  `

examples/federation-v2/sub-task-graphql/e2e/__fixtures__/index.ts

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+import { Connection } from 'typeorm'
+
+import { executeTruncate } from '../../../../helpers'
+import { SubTaskEntity } from '../../src/sub-task/sub-task.entity'
+
+const tables = ['sub_task']
+export const truncate = async (connection: Connection): Promise<void> => executeTruncate(connection, tables)
+
+export const refresh = async (connection: Connection): Promise<void> => {
+  await truncate(connection)
+
+  const todoItems = [
+    { id: 1, title: 'Create Nest App' },
+    { id: 2, title: 'Create Entity' },
+    { id: 3, title: 'Create Entity Service' },
+    { id: 4, title: 'Add Todo Item Resolver' },
+    { id: 5, title: 'How to create item With Sub Tasks' }
+  ]
+  const subTaskRepo = connection.getRepository(SubTaskEntity)
+
+  await subTaskRepo.save(
+    todoItems.reduce(
+      (subTasks, todo) => [
+        ...subTasks,
+        { completed: true, title: `${todo.title} - Sub Task 1`, todoItemId: todo.id },
+        { completed: false, title: `${todo.title} - Sub Task 2`, todoItemId: todo.id },
+        { completed: false, title: `${todo.title} - Sub Task 3`, todoItemId: todo.id }
+      ],
+      [] as Partial<SubTaskEntity>[]
+    )
+  )
+}
+
+export * from './graphql-fragments'