Question

我在创建两个具有oneToMany和ManyToOne关系的实体时遇到问题。这些是我的实体：

@Entity()
export class Photo {

    @PrimaryGeneratedColumn()
    id: number;

    @Column()
    name: string;

    @ManyToOne(type => User, user => user.photos)
    user: User;
}

@Entity()
export class User {

    @PrimaryGeneratedColumn()
    id: number;

    @Column()
    name: string;

    @OneToMany(type => Photo, photo => photo.user)
    photos: Photo[];
}

我试图创建一个用户以及3张具有关联关系的照片：

(async () => {
    const conn = await createConnection(typeOrmConfig);
    console.log('PG connected.');
    const photoRepo =await conn.getRepository(Photo)
    const userRepo = await conn.getRepository(User);
    let user1 = new User();
    user1.name = 'Matt';
    user1 = await userRepo.save(user1); 

    let photo1 = new Photo();
    photo1.name = "wallpaper"
    photo1.user = user1
    let photo2 = new Photo();
    photo2.name = "zanzibar"
    photo2.user = user1
    let photo3 = new Photo();
    photo3.name = "beach"
    photo3.user = user1

    await photoRepo.save(photo1)
    await photoRepo.save(photo2)
    await photoRepo.save(photo3)
    // Close connection
    await conn.close();    
})();

但是每当我尝试打印用户和照片时，我都看不到它们之间的任何关系字段（在每张照片中看不到用户/用户中的照片）：

const conn = await createConnection(typeOrmConfig);
console.log('PG connected.');
const photoRepo =await conn.getRepository(Photo)
const userRepo = await conn.getRepository(User);
console.log(await photoRepo.find())
console.log(await userRepo.find())
await conn.close();

输出：

[
  Photo { id: 1, name: 'wallpaper' },
  Photo { id: 2, name: 'Zanzibar' },
  Photo { id: 3, name: 'beach' }
]
[
  User { id: 1, name: 'Matt' }
]

我尝试访问user.photos，但未定义尝试访问photo.user时也是如此。知道如何解决这个问题吗？

如何在Typeorm中正确创建OneToMany关系？

0 个答案: