给出以下关系:
@Entity({name: 'accounts'})
export class Account {
@PrimaryGeneratedColumn('uuid')
id: string;
@OneToOne(type => Address, address => address.id)
@JoinColumn({name: 'address_id'})
address: Address;
@Column()
name: string;
}
与addres关系:
@Entity({name: 'addresses'})
export class Address {
@PrimaryGeneratedColumn('uuid')
id: string;
@Column({length: 45})
country: string;
}
当我以此获得account
实体时:
/**
* Gets account by haccount ID with ALL relations
* @param accountId The account ID
*/
public async getAccountByAccountIdWithRelations(accountId: string): Promise<Account> {
return await this.findOneOrFail({id: accountId}, {relations: ['address']});
}
我得到了其中具有Account
关系的完整Address
实体。
然后执行以下操作:
account.address.country = 'newcountry';
并在this.save(account)
中执行accountRepository
,地址根本不会更新!
在保存之前执行控制台日志时,我看到带有更新地址的account
实体,所以这真的很奇怪!
为什么会这样?
注意:所有查询都在事务中完成;我不知道这是否重要
答案 0 :(得分:1)
应设置级联。这是我的实体的一个示例:
@Entity()
@Index([ 'studyId', 'teamId', 'enterdate' ])
export class DataMessage extends BaseEntity {
@PrimaryGeneratedColumn('increment') id: number;
@CreateDateColumn() enterdate: Date;
@UpdateDateColumn({ select: false })
updatedAt?: Date;
@Column() owner: string;
@Column() studyId: number;
@Column() teamId: number;
@Column() patient: string;
@Column() orderId: number;
@Column({ default: DataMessageStatus.OPEN })
status: DataMessageStatus;
@Column()
@Index()
resultId: number;
@OneToMany(() => DataMessageContent, (c) => c.message, { cascade: true })
contents: DataMessageContent[];
}
@Entity()
export class DataMessageContent extends BaseEntity {
@PrimaryGeneratedColumn('increment') id: number;
@CreateDateColumn() enterdate: Date;
@Column() owner: string;
@Column() role: UserRole;
@Column({ default: MessageStatus.UNREAD })
status: MessageStatus;
@Column() txt: string;
@ManyToOne(() => DataMessage, (m) => m.contents)
message: DataMessage;
}
这也应该适用于一对一关系。
答案 1 :(得分:0)
在sql上进行这种更新非常复杂,即使使用queryBuilder TypeORM,它也不支持联接更新(您可以here看到它)。关系选择器很有帮助,但是我建议您在确实需要它时使用它,并添加一个可为空的字段以获取地址的ID并单独获取地址,这样在您需要更改内容的情况下,事情变得容易得多关系让您说出何时要更改整个地址对象。这将是关系的结果:
@Entity({name: 'accounts'})
export class Account {
@PrimaryGeneratedColumn('uuid')
id: string;
@Column({ nullable: true })
address_id: string;
@OneToOne(type => Address, address => address.id)
@JoinColumn({name: 'address_id'})
address: Address;
@Column()
name: string;
}
您可以像以前一样继续调用该关系:
public async getAccountByAccountIdWithRelations(accountId: string): Promise<Account> {
return await this.findOneOrFail({id: accountId}, {relations: ['address']});
}
使用此方法将使插入和更新变得容易,并且在oneToMany => manyToOne关系中也可以使用