Custom Service

To create a custom query service to add your own methods to you can extend the TypeOrmQueryService.

todo-item.service.ts

import { QueryService } from '@ptc-org/nestjs-query-core'
import { TypeOrmQueryService } from '@ptc-org/nestjs-query-typeorm';
import { InjectRepository } from '@nestjs/typeorm';
import { Repository } from 'typeorm';
import { TodoItemEntity } from './todo-item.entity';

@QueryService(TodoItemEntity)
export class TodoItemService extends TypeOrmQueryService<TodoItemEntity> {
  constructor(
    @InjectRepository(TodoItemEntity) repo: Repository<TodoItemEntity>,
  ) {
    super(repo);
  }

  async markAllAsCompleted(): Promise<number> {
     const entities = await this.query({ filter: { completed: { is: true } } });

     const { updatedCount } = await this.updateMany(
       { completed: true }, // update
       { id: { in: entities.map(e => e.id) } } // filter
     );
     // do some other business logic
     return updatedCount;
  }
}

To use the custom service in the auto-generated resolver you can specify the ServiceClass option.

todo-item.module.ts

import { NestjsQueryGraphQLModule } from '@ptc-org/nestjs-query-graphql';
import { NestjsQueryTypeOrmModule } from '@ptc-org/nestjs-query-typeorm';
import { Module } from '@nestjs/common';
import { TodoItemDTO } from './dto/todo-item.dto';
import { TodoItemEntity } from './todo-item.entity';
import { TodoItemService } from './todo-item.service';

@Module({
  imports: [
    NestjsQueryGraphQLModule.forFeature({
      imports: [NestjsQueryTypeOrmModule.forFeature([TodoItemEntity])],
      services: [TodoItemService],
      resolvers: [
        {
          DTOClass: TodoItemDTO,
          ServiceClass: TodoItemService,
        },
      ],
    }),
  ],
})
export class TodoItemModule {}