Question

使用TypeORM并联接为Postgres数据库设置的表时，我遇到了一个非常有趣的问题。我想通了，但认为我会将信息发布给其他有类似问题的人。

我在数据库中设置了3个表：user，organisation，user_organisation。

其目的是用户可以属于许多组织，名为user_organisation的表将用户映射到这些组织。所以我的实体看起来像这样，

user.entity.ts

import { TimestampedEntity } from '@shared/entities/timestamped.entity';
import { Organisation } from '@user/entities/organisation.entity';
import { UserOrganisation } from '@user/entities/user-organisation.entity';
import { Column, Entity, Index, JoinTable, ManyToMany, OneToMany, PrimaryGeneratedColumn } from 'typeorm';

@Entity()
@Index(['email', 'password'])
export class User extends TimestampedEntity {
    @PrimaryGeneratedColumn()
    userId: number;

    @Column({
        length: 64
    })
    username: string;

    @Column({
        length: 500
    })
    email: string;

    @Column({
        length: 255
    })
    password: string;

    @Column({
        type: 'json',
    })
    details: any;

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

    @OneToMany(type => UserOrganisation, userOrganisation => userOrganisation.user)
    @JoinTable()
    userOrganisations: UserOrganisation[];
}

user-organisation.entity.ts

import { Organisation } from '@user/entities/organisation.entity';
import { User } from '@user/entities/user.entity';
import { Column, Entity, JoinColumn, ManyToOne, OneToOne, PrimaryColumn, PrimaryGeneratedColumn } from 'typeorm';

@Entity()
export class UserOrganisation {
    @ManyToOne(type => User, user => user.userOrganisations, { primary: true })
    user: User;

    @ManyToOne(type => Organisation, organisation => organisation.userOrganisations, { primary: true })
    organisation: Organisation;
}

organization.entity.ts

import { TimestampedEntity } from '@shared/entities/timestamped.entity';
import { UserOrganisation } from '@user/entities/user-organisation.entity';
import { User } from '@user/entities/user.entity';
import { Column, Entity, JoinColumn, JoinTable, ManyToMany, ManyToOne, OneToMany, OneToOne, PrimaryGeneratedColumn } from 'typeorm';

@Entity()
export class Organisation extends TimestampedEntity {
    @PrimaryGeneratedColumn()
    orgId: number;

    @Column({
        length: 255
    })
    name: string;

    @Column({
        type: 'json'
    })
    details: any;

    @OneToMany(type => UserOrganisation, userOrganisation => userOrganisation.organisation)
    userOrganisations: UserOrganisation[];
}

然后我试图运行以下查询，

this.userRepository.createQueryBuilder('user')
    .where('user.email = :email', { email })
    .innerJoin(UserOrganisation, 'userOrganisation', 'user.userId = userOrganisation.userUserId')
    .getOne();

这是我收到的错误消息，

ERROR:  missing FROM-clause entry for table "userorganisation" at character 401

最终的查询像这样打印出来，

SELECT "user"."createdAt" AS "user_createdAt", "user"."updatedAt" AS "user_updatedAt", "user"."userId" AS "user_userId", "user"."username" AS "user_username", "user"."email" AS "user_email", "user"."password" AS "user_password", "user"."details" AS "user_details", "user"."refreshToken" AS "user_refreshToken" FROM "user" "user" INNER JOIN "user_organisation" "userOrganisation" ON "user"."userId" = userOrganisation.userUserId WHERE "user"."email" = $1

我修复它的方法如下所述。

Answer 1

做得好。但是，在typeorm中使用联接时，必须先编写定义的条件，然后设置对象。

this.userRepository.createQueryBuilder('user')
        .where('user.email = :email', { email })
        .innerJoin(UserOrganisation, 'userOrganisation', 'user.userId=userOrganisation.user.userId')
        .getOne();

为此，您无需添加引号。

生成的sql不显示引号，因为它不知道如何填充条件。

我希望这会有所帮助。

Answer 2

我在查询中发现的内容

SELECT "user"."createdAt" AS "user_createdAt", "user"."updatedAt" AS "user_updatedAt", "user"."userId" AS "user_userId", "user"."username" AS "user_username", "user"."email" AS "user_email", "user"."password" AS "user_password", "user"."details" AS "user_details", "user"."refreshToken" AS "user_refreshToken" FROM "user" "user" INNER JOIN "user_organisation" "userOrganisation" ON "user"."userId" = userOrganisation.userUserId WHERE "user"."email" = $1

联接条件中的user表和userOrganisation表之间是否存在差异，

"user"."userId" = userOrganisation.userUserId

user表会自动用引号引起来，但userOrganisation却没有...所以我将代码更改为以下代码，

this.userRepository.createQueryBuilder('user')
        .where('user.email = :email', { email })
        .innerJoin(UserOrganisation, 'userOrganisation', '"user"."userId" = "userOrganisation"."userUserId"')
        .getOne();

如果您在上面查看，我已经在连接条件中添加了引号。现在都在工作：）

希望这会有所帮助！

TypeORM：[364]错误：字符“ 401

2 个答案: