如何在 Typeorm 中获取嵌套实体？

Question

如何正确获取嵌套实体？例如，我进行以下查询：

const houseId = 1;
const userId = 1;

const house = await this.houseRepository.findOne({
  id: houseId,
}, {
  where: {
    project: {
      user: {
        id: userId,
      }
    }
  },
  relations: ['project', 'project.user']
});

结果，house变量包含project实体，但project不包含user。如何user纳入project？据我从文档中了解到，实体user中的属性project被声明为惰性属性，如果我想获取它，我应该解决它：

const user = await house.project.user;
console.log(user);
-> undefined

但是解析user在控制台中给出了未定义，特别是因为它在解析之前未定义。

房屋实体类：

@Entity('house')
export class HouseEntity {
  @PrimaryGeneratedColumn()
  id: number;

  @Column()
  name: string;

  @ManyToOne(type => ProjectEntity, { eager: true })
  project: ProjectEntity;
}

项目实体类：

@Entity('project')
export class ProjectEntity {
  @PrimaryGeneratedColumn()
  id: number;

  @Column()
  name: string;

  @ManyToOne(type => UserEntity, user => user.projects)
  user: UserEntity;
}

用户实体类：

@Entity('user')
export class UserEntity {

  @PrimaryGeneratedColumn()
  id: number;

  @Column()
  first_name: string;

  @OneToMany(type => ProjectEntity, project => project.user)
  projects: ProjectEntity[];
}