NestJS EntityMetadataNotFoundError：找不到“存储库”的元数据

Question

我知道有很多关于这个主题的帖子。我真的很难理解我到底想做什么来解决这个问题。使用 Postman，当我尝试命中路线时，出现以下错误：

ERROR [ExceptionsHandler] No metadata for "OrganizationsRepository" was found.
EntityMetadataNotFoundError: No metadata for "OrganizationsRepository" was found.

这是我的代码的样子

// app.module.ts

@Module({
  imports: [
    TypeOrmModule.forRoot({
      type: 'postgres',
      host: 'localhost',
      port: 5432,
      database: 'my-database',
      username: 'postgres',
      password: 'password',
      autoLoadEntities: true,
      synchronize: true,
    }),
    ConfigModule.forRoot({
      isGlobal: true,
    }),
    OrganizationsModule,
  ],
  controllers: [],
  providers: [],
  exports: [],
})
export class AppModule {}

// organizations.repository.ts

@EntityRepository(Organization). // this is showing as deprecated
export class OrganizationsRepository extends Repository<Organization> {
...
}

// organization.entity.ts

@Entity({ name: 'organizations' })
export class Organization extends BaseEntity {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Column()
  name: string;
...

我相信我需要创建一个新的DataSource——或更具体地说，一个自定义存储库？

我一直使用上面的方法从我的数据库中读取数据，没有任何问题。现在突然间我收到此错误，并且我不确定如何在我的代码中解决。

Answer 1

EntityRepository 已被弃用，因此您可以用 Injectable() 替换它，然后您需要修改您的存储库、模块和服务。我给你举了例子，希望对你有帮助。

存储库.ts

import { Injectable } from '@nestjs/common';
import { DataSource, Repository } from 'typeorm';
import { Organization } from './Organization.entity';
 
@Injectable() // here
export class OrganizationRepository extends Repository<Organization> {
  constructor(private dataSource: DataSource) {
    super(Organization, dataSource.createEntityManager());
  }

        sync createOrganization({ title, description }: CreateOrganizationDto):Promise<Organization> {...}
  }

组织.module.ts

import { Module } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm';
import { Organization } from './Organization.entity';
import { OrganizationController } from './Organization.controller';
import { OrganizationRepository } from './Organization.repository';
import { OrganizationService } from './Organization.service';
 
@Module({
  imports: [TypeOrmModule.forFeature([Organization])],
  controllers: [OrganizationController],
  providers: [OrganizationService, OrganizationRepository],
})
export class OrganizationModule {}

组织.service.ts

import { Injectable, NotFoundException } from '@nestjs/common';
import { OrganizationRepository } from './organization.repository';
import { InjectRepository } from '@nestjs/typeorm';
import { Organization } from './organization.entity';
 
@Injectable()
export class OrganizationService {
  constructor(private readonly OrganizationRepository: OrganizationRepository) {}
 
  async getOrganizationById(id: string): Promise<Organization> {
    const record = this.OrganizationRepository.findOne({ where: { id } });
    if (!record) {
      throw new NotFoundException();
    }
    return record;
  }
}