How to use with typeORM

[shinnthantminn]

Use with typeOrm

i want to use seeding with typeOrm but stay db error how can i solve this

[petetnt]

Here's a small TypeORM example for future reference:

user.entity.ts

import {
  Entity,
  Column,
  PrimaryGeneratedColumn,
  Index,
} from 'typeorm';
import { Factory } from 'nestjs-seeder';

@Entity('user')
export class User {
  @PrimaryGeneratedColumn('uuid')
  id!: string;

  @Factory((faker) => { 
    return faker!.string.alphanumeric(28);
  })
  @Index({ unique: true })
  @Column({ nullable: false })
  userId!: string;

  @Factory((faker) => faker.person.fullName())
  name!: string;
}

user.service.ts

import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import {
  DeepPartial,
  InsertResult,
  Repository,
 Not,
  IsNull
} from 'typeorm';
import { User } from './user.entity';

@Injectable()
export class UserService {
  constructor(
    @InjectRepository(User)
    private userRepository: Repository<User>,
  ) {}

  save(users: DeepPartial<User>[]) {
    return this.userRepository.save(users);
  }

  delete(criteria: Parameters<Repository<User>['delete']>[0]) {
    return this.userRepository.delete({
      id: Not(IsNull())
    });
  }
}

user.seeder.ts

import { Injectable } from '@nestjs/common';
import { Seeder, DataFactory } from 'nestjs-seeder';
import { User } from '../users/user.entity';
import { DeepPartial, In } from 'typeorm';
import { UserService } from './user.service';

@Injectable()
export class UsersSeeder implements Seeder {
  users: DeepPartial<User>[];
  constructor(private readonly userService: UserService) {
    // Generate 10 users.
    this.users = DataFactory.createForClass(User).generate(
      10,
    ) as DeepPartial<User>[];
  }

  async seed() {
    return this.userService.save(this.users);
  }

  async drop() {
    return this.userService.deleteAll()
  }
}

user.module.ts

import { Module } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm';
import { ConfigModule } from '@nestjs/config';
import { UserService } from './user.service';
import { User } from './user.entity';

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

user.seeder.ts

import { seeder } from 'nestjs-seeder';
import { UsersSeeder } from './user.seeder';
import { TypeOrmModule } from '@nestjs/typeorm';
import { TypeOrmConfigService } from '../typeorm-config/typeorm-config.service';
import { UserModule } from '../user.module';

seeder({
  imports: [
    TypeOrmModule.forFeature([User])
    UserModule,
  ],
}).run([UsersSeeder]);

Install ts-node and add to package.json:

  "seed": "ts-node -r tsconfig-paths/register ./src/user.seeder.ts"
  "seed:refresh": "ts-node -r tsconfig-paths/register ./src/user.seeder.ts --refresh"

and run

npm run seed

or

npm run seed:refresh

@edwardanthony Would you want a PR to README for this?