postgresql - 类型ORM ReferenceError : X is not defined

Question

我正在使用 TypeORM 设置我的数据库表。我有一个 User 实体和一个 MediaList 实体。 User 与 MediaList 实体具有 OneToMany 关系，如下所示:

@Entity('users')
export class User extends BaseEntity {
  @PrimaryGeneratedColumn('uuid') public id: string;

  @Column('varchar', {length: 50, name: 'first_name'})
  public firstName: string;

  @Column('varchar', {length: 50, name: 'last_name'})
  public lastName: string;

  @Column('varchar', {nullable: false, length: 255})
  public email: string;
  .
  .
  .
  @OneToMany((type) => MediaList, (mediaList) => mediaList.owner)
  public mediaLists: MediaList[];
}

@Entity('media_list')
export class MediaList extends BaseEntity {

  @PrimaryGeneratedColumn('uuid') public id: string;

  @Column('varchar', {length: 50})
  public title: string;

  @ManyToOne((type) => User, (user) => user.mediaLists)
  public owner: User;
}

我这样创建一个用户:

    const user = User.create({
        firstName: 'john',
        lastName: 'doe',
        email,
        password,
        permissions: generalPermissions,
    });

    await user.save();

保存用户时，出现引用错误:

(node:16708) UnhandledPromiseRejectionWarning: ReferenceError: MediaList is not defined

我在这里做错了什么？我的映射不正确吗？

Answer 1

The problem is basically with ESM, because circular references give null values.

https://github.com/typeorm/typeorm/issues/2059