This is an improvement to allow @nestjs/[email protected] to handle CustomRepository. I won't explain it specifically, but it will help in some way. https://github.com/nestjs/typeorm/pull/1233

README.md

You need to provide some classes and decorators yourself to maintain the same style as [email protected].

1. EntityRepository -> CustomRepository

@EntityRepository(UserEntity)
export class UserRepository extends Repository<UserEntity> {}

↓

@CustomRepository(UserEntity)
export class UserRepository extends Repository<UserEntity> {}

2. forFeature -> forCustomRepository

@Module({
  exports: [UserService],
  imports: [TypeOrmModule.forFeature([UserRepository])],
  providers: [UserService],
})
export class UserModule {}

↓

@Module({
  exports: [UserService],
  imports: [TypeOrmExModule.forCustomRepository([UserRepository])],
  providers: [UserService],
})
export class UserModule {}

database.options.ts

@Injectable()
export class DatabaseOptions implements TypeOrmOptionsFactory {

  public createTypeOrmOptions(): TypeOrmModuleOptions {
    return {
      ...
      entities: [UserEntity],
    };
  }
}

typeorm-ex.decorator.ts

import { SetMetadata } from "@nestjs/common";

export const TYPEORM_EX_CUSTOM_REPOSITORY = "TYPEORM_EX_CUSTOM_REPOSITORY";

export function CustomRepository(entity: Function): ClassDecorator {
  return SetMetadata(TYPEORM_EX_CUSTOM_REPOSITORY, entity);
}

typeorm-ex.module.ts

import { DynamicModule, Provider } from "@nestjs/common";
import { getDataSourceToken } from "@nestjs/typeorm";
import { DataSource } from "typeorm";
import { TYPEORM_EX_CUSTOM_REPOSITORY } from "./typeorm-ex.decorator";

export class TypeOrmExModule {
  public static forCustomRepository<T extends new (...args: any[]) => any>(repositories: T[]): DynamicModule {
    const providers: Provider[] = [];

    for (const repository of repositories) {
      const entity = Reflect.getMetadata(TYPEORM_EX_CUSTOM_REPOSITORY, repository);

      if (!entity) {
        continue;
      }

      providers.push({
        inject: [getDataSourceToken()],
        provide: repository,
        useFactory: (dataSource: DataSource): typeof repository => {
          const baseRepository = dataSource.getRepository<any>(entity);
          return new repository(baseRepository.target, baseRepository.manager, baseRepository.queryRunner);
        },
      });
    }

    return {
      exports: providers,
      module: TypeOrmExModule,
      providers,
    };
  }
}

user.module.ts

import { Module } from "@nestjs/common";
import { TypeOrmExModule } from "../database/typeorm-ex.module";
import { UserRepository } from "./user.repository";
import { UserService } from "./user.service";

@Module({
  exports: [UserService],
  imports: [TypeOrmExModule.forCustomRepository([UserRepository])],
  providers: [UserService],
})
export class UserModule {}

user.repository.ts

import { Repository } from "typeorm";
import { CustomRepository } from "../database/typeorm-ex.decorator";
import { UserEntity } from "./user.entity";

@CustomRepository(UserEntity)
export class UserRepository extends Repository<UserEntity> {}

user.service.ts

import { Injectable } from "@nestjs/common";
import { UserRepository } from "./user.repository";

@Injectable()
export class UserService {
  constructor(private readonly repository: UserRepository) {}
}

In case you wish to use this within a transaction you can do something like:

this.entityManager.transaction((entityManager) => {
  const myRepository = entityManager.withRepository(this.myRepository);
  myRepository.find(...);
});

Hi, thanks for your great workaround.
I'm new in nestJs. The thing is now I can't use this service inside another module.

I have a UsersModule that uses custom repository and exports UsersService . In my AuthModule I have imported UsersModule and in AuthService I'm trying to use UsersService. I'm facing the error bellow:

Nest can't resolve dependencies of the UsersService (?). Please make sure that the argument UserRepository at index [0] is available in the UsersModule context.

any help would be appreciated.

I just found a way that, IMHO, it's cleaner and easier to use/test https://github.com/leosuncin/nest-typeorm-custom-repository

Thanks for sharing, tho.

@anchan828 Hi, this helped me a lot thank you, but how can mock this in tests? it's not a provider and the way I usually do was getRepositoryToken(Model) and it doesn't work.

@khasanovdiyor If you have a UserRepository, you can use { provide: UserRepository, useValue: createMock() }.

@CustomRepository(UserEntity)
export class UserRepository extends Repository<UserEntity> {}

@anchan828 hey thanks for the reply, yeah I was using it like that, but wasn't working, but I figured out that problem was when getting the instance with module.get(), anyways thank you!

Hi @anchan828, I'm new in nest, what DatabaseOptions is for?

@anchan828 Thanks for this, I found it very helpful! It saved me quite a bit of refactoring time.

@ffind DatabaseOptions can be used in the following away in your root app module:

TypeOrmModule.forRootAsync({
  useClass: DatabaseOptions,
});

You can take a look at the documentation here: https://docs.nestjs.com/techniques/database#async-configuration

Hey everyone. Any idea how to use method from CustomRepository1 in CustomRepository2 ? I tried to inject CustomRepository1 in constructor, but then I should call super() and pass the params which I don't know :(

@Siusarna If you adopt my method, you cannot do Inject because CustomRepository simply creates an instance from a Class. You must manually create a Repository from the datasource.

I don't know if it actually works, but this is what it looks like.

@EntityCustomRepository(UserEntity)
export class UserRepository extends Repository<UserEntity> {

  customRepository2: CustomRepository2;

  constructor(target: EntityTarget<UserEntity>, manager: EntityManager, queryRunner?: QueryRunner) {
    super(target, manager, queryRunner);

    const baseRepository = manager.getRepository<any>(CustomEntity2);
    this.customRepository2 = new CustomRepository2(baseRepository.target, baseRepository.manager, baseRepository.queryRunner);
  }
}

Thanks a lot ❤️. I will try it out

any idea on how to make use of custom repositories when working with transactions using

const queryRunner = this.dataSource.createQueryRunner();
await queryRunner.connect();
await queryRunner.startTransaction();

and then pass queryRunner to the service where we normally would do:
const userRepository: UserRepository = queryRunner.manager.getCustomRepository(UserRepository)

however by now using customRepositories from this github thread the queryRunner no longer holds any instances of the repositories and thus throwing the error:
Custom repository UserRepository was not found. Did you forgot to put @EntityRepository decorator on it?

any idea on how to make use of custom repositories when working with transactions using

const queryRunner = this.dataSource.createQueryRunner();
await queryRunner.connect();
await queryRunner.startTransaction();

and then pass queryRunner to the service where we normally would do: const userRepository: UserRepository = queryRunner.manager.getCustomRepository(UserRepository)

however by now using customRepositories from this github thread the queryRunner no longer holds any instances of the repositories and thus throwing the error: Custom repository UserRepository was not found. Did you forgot to put @EntityRepository decorator on it?

Can you do something like this?

any idea on how to make use of custom repositories when working with transactions using

const queryRunner = this.dataSource.createQueryRunner();
await queryRunner.connect();
await queryRunner.startTransaction();

and then pass queryRunner to the service where we normally would do: const userRepository: UserRepository = queryRunner.manager.getCustomRepository(UserRepository)
however by now using customRepositories from this github thread the queryRunner no longer holds any instances of the repositories and thus throwing the error: Custom repository UserRepository was not found. Did you forgot to put @EntityRepository decorator on it?

Can you do something like this?

apparently not since the queryRunner is created using annotation like:

@Injectable()
export class TransactionInterceptor implements NestInterceptor {
  constructor(private readonly dataSource: DataSource) {}

  public async intercept(context: ExecutionContext, next: CallHandler): Promise<Observable<any>> {
    const httpContext: HttpArgumentsHost = context.switchToHttp()
    const queryRunner: QueryRunner = this.dataSource.createQueryRunner()
    const request: RequestWithTransactionQueryRunner = httpContext.getRequest()
    request.queryRunner = queryRunner
    await request.queryRunner.connect()
    await request.queryRunner.startTransaction()
    return next.handle().pipe(
      finalize(async () => {
        await queryRunner.commitTransaction()
        await queryRunner.release()
      }),
      catchError(async error => {
        await queryRunner.rollbackTransaction()
        throw error
      })
    )
  }
}

How about

queryRunner.manager.withRepository(this.myCustomRepository)

where this.myCustomRepository is the injected custom repository? I was able to use that strategy successfully. The EntityManager#withRepository method re-creates the repository and assigns both the EntityManager and the QueryRunner instances to it.

Note: I'm using this strategy with the entityManager.transaction((em) => ...) method so I haven't tested with the QueryRunner#manager approach.

How about

queryRunner.manager.withRepository(this.myCustomRepository)

where this.myCustomRepository is the injected custom repository? I was able to use that strategy successfully. The EntityManager#withRepository method re-creates the repository and assigns both the EntityManager and the QueryRunner instances to it.

Note: I'm using this strategy with the entityManager.transaction((em) => ...) method so I haven't tested with the QueryRunner#manager approach.

great Idea, didnt know about it, it does in fact work. Thanks!

Hi everyone, any idea on How can I use QueryBuilder in user.repository.ts too .

Hey everyone. If you want to use transactions in a simpler way, there's a pretty cool lib that uses cls-hooked for that:

• https://github.com/Aliheym/typeorm-transactional

But we have to modify how custom repositories are provided in typeorm-ex.module.ts as suggested by the author of the lib:

• Aliheym/typeorm-transactional#8 (comment)

Hope this can be helpful to someone. It worked great for me!

I created a utility method to provide custom repositories. Open to feedback: https://gist.github.com/rhutchison/a530d89c37f1978a48dcee4bf2418cb7

import { Injectable } from '@nestjs/common';
import { DataSource, Repository } from 'typeorm';
import { User } from './user.entity';

@Injectable()
export class UserRepository extends Repository<User> {
  constructor(private readonly dataSource: DataSource) {
    super(User, dataSource.manager);
  }
}

Should do the trick. Don't forget to add UserRepository as a provider of the module.

Hello, thanks for your solution, works great to bridge from nestjs v8.x / typeorm 0.2.x to nestjs 9.x / typeorm 0.3.x, however, how do you deal with custom repositories imports / mocks within Unit tests / e2e ?

Thanks in advance fo any insight

Thank you for this solution for managing custom repos.

I have custom repositories and entities in a library, that I install using npm.

Datasources are defined in the client project, so from the client I name the DataSource, and use the name as parameter of TypeOrmExModule.forCustomRepository.

But I get an error saying Nest can't resolve dependencies of the MyEntityRepository (?). Please make sure that the argument DataSource at index [0] is available in the TypeOrmExModule context.

This MyEntityRepository does not exist, but MyEntity and MyRepository do.

Is there a way to fix this?

I tried to add DataSource to list of providers, but then I get:

TypeError: Cannot read properties of undefined (reading 'name') at new DataSource (D:\xxx\src\data-source\DataSource.ts:133:29) at Injector.instantiateClass (D:\xxx\node_modules\@nestjs\core\injector\injector.js:340:19) at callback (D:\xxx\node_modules\@nestjs\core\injector\injector.js:53:45) at Injector.resolveConstructorParams (D:\xxx\node_modules\@nestjs\core\injector\injector.js:132:24) at Injector.loadInstance (D:\xxx\node_modules\@nestjs\core\injector\injector.js:57:13) at Injector.loadProvider (D:\xxx\node_modules\@nestjs\core\injector\injector.js:84:9) at async Promise.all (index 3) at InstanceLoader.createInstancesOfProviders (D:\xxx\node_modules\@nestjs\core\injector\instance-loader.js:47:9) at D:\xxx\node_modules\@nestjs\core\injector\instance-loader.js:32:13 at async Promise.all (index 6)

Thanks a lot.

@GaryHebert What do you mean??? You mean that you import like this???:

TypeOrmExModule.forCustomRepository([DataSource])

@anchan828 Hey, Thanks for your answer. I use it and works perfect.

@GaryHebert What do you mean??? You mean that you import like this???:

TypeOrmExModule.forCustomRepository([DataSource])

I modified the TypeOrmExModule like @anchan828 suggestion on june 10th, adding the dataSourceName parameter.

Firstly, thanks for the gist @anchan828

I don't know nothing about nest js yet and I need to make this update. I did everything but in my service I was injecting the repository with this decorator @InjectRepository as below:

@Injectable()
export class ABCService {

  constructor(
    @InjectRepository(ABCRepository, 'FDM')
    private readonly abcRepository: ABCRepository
  ) {}
.
.
.
}

And after the modifications I'm getting this error:
Nest can't resolve dependencies of the ABCService (?). Please make sure that the argument ABC_ABCRepository at index [0] is available in the ABCModule context.

How can i fix this?
I've tried to manually construct the repository inside the service constructor, but, I don't have any of the necessary arguments there, as EntityManager and QueryRunner.

import { Injectable } from '@nestjs/common';
import { DataSource, Repository } from 'typeorm';
import { User } from './user.entity';

@Injectable()
export class UserRepository extends Repository<User> {
  constructor(private readonly dataSource: DataSource) {
    super(User, dataSource.manager);
  }
}

Should do the trick. Don't forget to add UserRepository as a provider of the module.

This will work for some use cases. But it wont work if you're using transactions, because the repository constructor is called directly inside withRepository().

Unfortunately, the simpler solution (as recommended by @kamilmysliwiec here nestjs/typeorm#1422) does not work with transactions.

Any idea for multiple database connection with custom repositories?

import { Injectable } from '@nestjs/common';
import { DataSource, Repository } from 'typeorm';
import { User } from './user.entity';

@Injectable()
export class UserRepository extends Repository<User> {
  constructor(private readonly dataSource: DataSource) {
    super(User, dataSource.manager);
  }
}

Should do the trick. Don't forget to add UserRepository as a provider of the module.

It works for me, thanks!