Limit/offset not working in combination with joins with Postgres DB

I’m getting error QueryFailedError: column reference "Ticket_id" is ambiguous when trying to query findMany with both a join and a specified limit when using Postgres DB. Tried the same code, but with a SQLite DB and it works as intended.

Any suggestions on how to get this to work with Postgres?

Error

QueryFailedError: column reference "Ticket_id" is ambiguous
    at PostgresQueryRunner.query (/Users/jonasnr/WebstormProjects/nest_test/src/driver/postgres/PostgresQueryRunner.ts:299:19)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at SelectQueryBuilder.loadRawResults (/Users/jonasnr/WebstormProjects/nest_test/src/query-builder/SelectQueryBuilder.ts:3519:25)
    at SelectQueryBuilder.getRawMany (/Users/jonasnr/WebstormProjects/nest_test/src/query-builder/SelectQueryBuilder.ts:1551:29)
    at SelectQueryBuilder.executeEntitiesAndRawResults (/Users/jonasnr/WebstormProjects/nest_test/src/query-builder/SelectQueryBuilder.ts:3213:26)
    at SelectQueryBuilder.getRawAndEntities (/Users/jonasnr/WebstormProjects/nest_test/src/query-builder/SelectQueryBuilder.ts:1595:29)
    at SelectQueryBuilder.getMany (/Users/jonasnr/WebstormProjects/nest_test/src/query-builder/SelectQueryBuilder.ts:1685:25)

Query

'SELECT DISTINCT distinctAlias.Ticket_id as "ids_Ticket_id" FROM (SELECT Ticket.id AS Ticket_id, Ticket.id AS Ticket_id, Ticket.ticketName AS Ticket_ticketName, user.id AS user_id, user.id AS user_id, user.owner AS user_owner, user.username AS user_username, user.scope AS user_scope, user.ticketId AS user_ticketId FROM ticket Ticket LEFT JOIN user user ON user.ticketId=Ticket.id) distinctAlias ORDER BY Ticket_id ASC LIMIT 1'

See all files below:

Service

@Injectable()
export class TicketService extends TypeOrmCrudService<Ticket> {
  constructor(@InjectRepository(Ticket) repo) {
    super(repo);
  }
}

Controller

@ApiTags('tickets')
@Crud({
  model: { type: Ticket },
  query: {
    join: {
      user: { eager: true },
    },
    limit: 1,
  },
})
@Controller('ticket')
export class TicketController implements CrudController<Ticket> {
  constructor(public service: TicketService) {}
}

Entities

@Entity('ticket')
export class Ticket {
  @PrimaryGeneratedColumn()
  id: number;

  @Column()
  ticketName: string;

  @OneToOne(() => User, (user) => user.ticket)
  user: User;
}

@Entity('user')
export class User {
  @PrimaryGeneratedColumn()
  id: number;

  @Column()
  owner: string;

  @Column()
  username: string;

  @Column()
  scope: string;

  @OneToOne(() => Ticket)
  @JoinColumn()
  ticket: Ticket;
}

Module

@Module({
  imports: [
    TypeOrmModule.forRoot({
      type: 'postgres',
      host: 'localhost',
      port: 5432,
      username: 'postgres',
      password: 'postgres',
      database: 'postgres',
      autoLoadEntities: true,
      synchronize: true,
    }),
    TicketModule,
  ],
  controllers: [AppController],
  providers: [AppService],
})
export class AppModule {
  constructor() {}
}

[5andi5]

Maybe this patch helps someone:

import { uniq } from 'lodash'

@Injectable()
export class MyEntityService extends TypeOrmCrudService<MyEntity> {
  getSelect(query, options) {
    return uniq(super.getSelect(query, options))
  }
}

[hoangnq3004]

+1

P/S: When I downgrade typeorm to 0.2.45 the problem has solved