在 NodeJs 中更新数据库中的列

本文介绍了在 NodeJs 中更新数据库中的列的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我想更新一个有关系的列:

I want to update a column which has a relation:

async update(req, res): Promise<any> {
        const {email, password, id} = req.body;
        try {
            await getConnection()
                .createQueryBuilder()
                .update(User)
                .set({
                    email: email,
                    password: password,
                    meta: [{
                        name: "tesst",
                        message: "jasshd"
                    }]
                })
                .where("id = :id", {id: id})
                .execute();

            res.status(201).send({
                message: 'user updated'
            })

        } catch (e) {
            console.log('update', e)
            res.send({
                message: 'update error'
            })
        }
    }

元表与用户表有关.尝试使用附加的元更新用户，我得到: EntityColumnNotFound: No entity column "meta";找到了..为什么我收到这个错误?注意:如果我在注册用户时使用这种关系，例如:

Meta table is in relation with User table.Trying to update the user with the attached meta i get: EntityColumnNotFound: No entity column "meta" was found.. Why i get this error? Note: If i use this relation when i register the user like:

const user = this.usersRepository.create({
  email,
  password,
  meta: [{
    name: "tesst",
    message: "jasshd"
  }]
});
return await this.usersRepository.save(user);

...代码有效.为什么代码在我注册用户时有效，但在我更新时无效?

... the code work. Why the code works when i register the user but not when i update it?

@Entity()
export class User {
    @PrimaryGeneratedColumn()
    id: number;

    @Column({nullable: true})
    email: string;

    @Column({nullable: true})
    password: string;


    @OneToMany(() => Meta, meta => meta.user, { cascade: true })
    meta: Meta[];
}


export class Meta {
    @PrimaryGeneratedColumn({name: metaId})
    metaId: number;

    @Column({nullable: true})
    name: string;

    @Column({nullable: true})
    message: string;

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

推荐答案

我不认为你可以用 querybuilder 更新关系数据，我在这里看到的解决方案是用自身更新 meta :

I don't think you can update the relation data with querybuilder, the solution I see here is to update meta with itself :

async update(req, res): Promise<any> {
    const {email, password, id} = req.body;
    try {
        await getConnection()
            .createQueryBuilder()
            .update(User)
            .set({
                email: email,
                password: password,
                meta: [{
                    name: "tesst",
                    message: "jasshd"
                }]
            })
            .where("id = :id", {id: id})
            .execute();
  // Update meta :
    await getConnection()
            .createQueryBuilder()
            .update(Meta)
            .set({
                    name: "tesst",
                    message: "jasshd"
            })
            .where("user = :id", {id: id})
            .execute();
        res.status(201).send({
            message: 'user updated'
        })

    } catch (e) {
        console.log('update', e)
        res.send({
            message: 'update error'
        })
    }
}

Ps:此操作将更新所有具有user = :id

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Querybuilder