使用TypeForm保存实体时无法确定标题错误

我创建了一个NestJS,并为RDBMS使用了TypeORM(我在项目中使用了postgres)。

Post 是一个 @Entity 班 PostRepository 是一个 Repository 上课 邮递 .

我试图创造 OnModuleInit 服务初始化一些数据。

@Injectable()
export class PostsDataInitializer implements OnModuleInit {
  private data: Post[] = [
    {
      title: 'Generate a NestJS project',
      content: 'content',
    },
    {
      title: 'Create GrapQL APIs',
      content: 'content',
    },
    {
      title: 'Connect to Postgres via TypeORM',
      content: 'content',
    },
  ];

  constructor(private readonly postRepository: PostRepository) {}
  async onModuleInit(): Promise<void> {
    await this.postRepository.manager.transaction(async (manager) => {
      // NOTE: you must perform all database operations using the given manager instance
      // it's a special instance of EntityManager working with this transaction
      // and don't forget to await things here
      await manager.delete(Post, {});
      console.log('deleted: {} ');
      this.data.forEach(async (d) => await manager.save(d as Post));
      const savedPosts = await manager.find<Post>(Post);
      savedPosts.forEach((p) => {
        console.log('saved: {}', p);
      });
    });
  }
}

启动应用程序时,我遇到了以下错误。

CannotDetermineEntityError: Cannot save, given value must be instance of entity class, instead object literal is given. Or you must specify an entity target to method call.

但是上面 save 正在接受一个 邮递 .