通过第三个表的 TypeORM 关系不起作用

Question

按照 TypeORM 教程（这部分 - https://typeorm.io/#/many-to-many-relations/many-to-many-relations-with-custom-properties）我在我的应用程序中创建了模型：

@Entity({ name: 'organizations'})
export class OrganizationEntity extends AbstractEntity {
    @Column()
    name: string;

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

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

    @ManyToOne(() => UserEntity, { nullable: true })
    mainContactUser: UserEntity;

    @OneToOne(() => LicenseEntity, license => license.organization)
    license: LicenseEntity;

    @OneToMany(() => UserRoleEntity, userRole => userRole.user)
    users!: UserRoleEntity[]
}

@Entity({ name: 'users' })
export class UserEntity extends AbstractEntityWithDates {
    @Column({ nullable: false })
    firstName: string;

    @Column({ nullable: false})
    lastName: string;

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

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

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

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

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

    @OneToMany(() => UserRoleEntity, userRole => userRole.user)
    userRoles: UserRoleEntity[]
}

最后：

@Entity({ name: 'user_roles' })
export class UserRoleEntity extends AbstractEntity {
    @ManyToOne(() => UserEntity, user => user.userRoles)
    user: UserEntity;

    @ManyToOne(() => OrganizationEntity, organization => organization.users, { nullable: true })
    organization: OrganizationEntity;

    @ManyToOne(() => ProjectEntity, { nullable: true })
    project: ProjectEntity;

    @Column({
        type: "enum",
        enum: RoleType,
        nullable: true
    })
    role: string;
}

然后在一项服务中，我正在执行一个查询，我想在其中获取至少具有相关用户角色的所有组织：

        const found = await this.organizationRepository
            .createQueryBuilder("organization")
            .leftJoinAndSelect("organization.users", "users")
            .getMany();

没有错误但是TypeORM生成的查询如下：

SELECT "organization"."id" AS "organization_id", "organization"."name" AS "organization_name", "organization"."description" AS "organization_description", "organization"."logo" AS "organization_logo", "organization"."main_contact_user_id" AS "organization_main_contact_user_id", "users"."id" AS "users_id", "users"."role" AS "users_role", "users"."user_id" AS "users_user_id", "users"."organization_id" AS "users_organization_id", "users"."project_id" AS "users_project_id" 
FROM "organizations" "organization" 
LEFT JOIN "user_roles" "users" ON "users"."user_id"="organization"."id"

这部分：

...ON "users"."user_id"="organization"."id"

显然不正确，但我不明白为什么？

任何帮助将不胜感激。

Answer 1

您的 OrganizationEntity 在 OneToMany 配置中有错误；您设置了userRole.user，但它应该是userRole.organization，这是该表中链接到该字段的字段。

    @OneToMany(() => UserRoleEntity, userRole => userRole.organization)
    users!: UserRoleEntity[]

此外，您应该向表中添加主键。默认情况下，一种安全的方法是使用 Generated 列。您可以将其添加到您的 3 个表中。对于多对多表，您可以创建一个复合键，或者只是一个带有 user_id 和 company_id 的索引，但需要权衡 - 所以只需在每个表上使用一个 id 即可开始。

    @PrimaryGeneratedColumn()
    id: string;