typescript 删除和删除有什么区别？
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What’s the difference between remove and delete?
提问by Yegor Zaremba
For example, I have a TypeORM entity Profile:
例如，我有一个 TypeORM 实体Profile：
@Entity()
class Profile {
@PrimaryGeneratedColumn()
id: number;
@Column()
gender: string;
@Column()
photo: string;
@OneToOne(type => User, { cascade: true })
@JoinColumn()
user: User;
}
And I'm not sure which one should I use to delete a user profile?
而且我不确定应该使用哪个来删除用户配置文件？
Profile.remove(profile)
Profile.delete(profile)
What is the difference between the removeand deletemethods in TypeORM?
TypeORM 中的remove和delete方法有什么区别？
回答by Mukyuu
From Repo:
从回购：
remove- Removes a given entity or array of entities. It removes all given entities in a single transaction (in the case of entity, manager is not transactional).
remove- 删除给定的实体或实体数组。它在单个事务中删除所有给定的实体（在实体的情况下，管理器不是事务性的）。
Example:
例子：
await repository.remove(user);
await repository.remove([
category1,
category2,
category3
]);
delete- Deletes entities by entity id, ids or given conditions:
delete- 按实体 id、id 或给定条件删除实体：
Example:
例子：
await repository.delete(1);
await repository.delete([1, 2, 3]);
await repository.delete({ firstName: "Timber" });
As stated in example here:
作为例子说明这里：
import {getConnection} from "typeorm";
await getConnection()
.createQueryBuilder()
.delete()
.from(User)
.where("id = :id", { id: 1 })
.execute();
Which means you should use
removeif it contains an array of Entities.While you should use
deleteif you know the condition.
这意味着您应该使用
remove它是否包含实体数组。
delete如果您知道条件，则应该使用。
Additionally, as @Jamesstated in commentEntity Listenersuch as @BeforeRemoveand @AfterRemovelisteners only triggered when the entity is removed using repository.remove.
此外，正如@ James在评论中所述，Entity Listener例如@BeforeRemove和@AfterRemovelisteners 仅在使用repository.remove.
Similarly, @BeforeInsert, @AfterInsert, @BeforeUpdate, @AfterUpdateonly triggered when the entity is inserted/updated using repository.save.
同样，@BeforeInsert，@AfterInsert，@BeforeUpdate，@AfterUpdate只有当实体插入/使用更新的触发repository.save。
Source: Entity Listeners and Subscribers
来源：实体侦听器和订阅者
