未使用NestJS更新GraphQL架构(代码优先方法)

npm install @nestjs/graphql @nestjs/apollo graphql apollo-server-express

// src/app.module.ts
import { Module } from '@nestjs/common';
import { GraphQLModule } from '@nestjs/graphql';
import { ApolloDriver, ApolloDriverConfig } from '@nestjs/apollo';

@Module({
  imports: [
    GraphQLModule.forRoot<ApolloDriverConfig>({
      driver: ApolloDriver,
      autoSchemaFile: 'schema.gql',
    }),
  ],
})
export class AppModule {}

// src/user/user.entity.ts
import { ObjectType, Field, ID } from '@nestjs/graphql';

@ObjectType()
export class User {
  @Field(() => ID)
  id: string;

  @Field()
  name: string;

  @Field()
  email: string;
}

// src/user/user.resolver.ts
import { Resolver, Query } from '@nestjs/graphql';
import { User } from './user.entity';

@Resolver(() => User)
export class UserResolver {
  @Query(() => [User])
  async users() {
    // 模拟数据
    return [
      { id: '1', name: 'Alice', email: 'alice@example.com' },
      { id: '2', name: 'Bob', email: 'bob@example.com' },
    ];
  }
}

// src/app.module.ts
import { Module } from '@nestjs/common';
import { GraphQLModule } from '@nestjs/graphql';
import { ApolloDriver, ApolloDriverConfig } from '@nestjs/apollo';
import { UserResolver } from './user/user.resolver';
import { User } from './user/user.entity';

@Module({
  imports: [
    GraphQLModule.forRoot<ApolloDriverConfig>({
      driver: ApolloDriver,
      autoSchemaFile: 'schema.gql',
    }),
  ],
  providers: [UserResolver, User],
})
export class AppModule {}