Question

我有这个想法

@ManyToMany(() => User, user => user.following)
@JoinTable()
followers: User[]

@ManyToMany(() => User, user => user.followers)
following: User[]

如何在此关系中插入新关注者？我是typeorm和sql数据库的新手

Answer 1

您可以通过启用级联来执行此操作：

@ManyToMany(() => User, user => user.following, {cascadeInsert: true, cascadeUpdate: true})
@JoinTable()
followers: User[]

@ManyToMany(() => User, user => user.followers, {cascadeInsert: true, cascadeUpdate: true})
following: User[]

如果您不想使用cascadeInsert和cascadeUpdate，则必须手动保存相关实体：

const follower1 = new Follower({...});
await connection.manager.save(follower1);

const follower2 = new Follower({...});
await connection.manager.save(follower2);

const entity = new Entity();
entity.followers = [follower1, follower2];
await connection.manager.save(entity);

有关详细信息，请参阅TypeORM文档：https://github.com/typeorm/typeorm/blob/master/docs/many-to-many-relations.md）

如何在此关系中插入关注者

1 个答案: