标签：style 自定义 gen 角色 create 实体 权限管理 script common
本文以RBAC权限管理中的用户和角色举例，两个实体存在多对多的关系，一个用户拥有多个角色，一个角色属于多个用户。typeorm的中文文档没有对自定义中间表的说明，发现英文有相关说明，但示例代码貌似有问题。
一、中间表有自定义字段的处理
在用户user和role实体之外，新建一个roleUse的实体（记录用户和角色的关联关系），如此本来是多对多的关系，变成了user和role与roleUser二组一对多的关系，这样虽然会多定义一个实体，但好处是可以中间表可以扩展定义其它额外的数据
用户实体 user.entity.ts
import { Entity, Column, Index, ManyToMany, JoinColumn, OneToMany, JoinTable, PrimaryGeneratedColumn, CreateDateColumn, UpdateDateColumn } from ‘typeorm‘;
import { Role } from ‘../../admin/role/role.entity‘;
import { UserRole } from ‘../../admin/role/roleUser.entity‘;
@Entity()
export class User {
@PrimaryGeneratedColumn()
id: number;
@Column({ length: 100 })
@Index({ unique: true })
name: string;
@OneToMany(type => UserRole, userRole => userRole.user)
userRoles: UserRole[];
}
角色实体role.entity.ts
import { Entity, Column, ManyToMany, OneToMany, JoinTable, JoinColumn } from ‘typeorm‘;
import { BaseEntity } from ‘../../../common/base/base.entity‘;
import { UserRole } from ‘./roleUser.entity‘;
@Entity(‘role‘)
export class Role extends BaseEntity {
@Column({ length: 100 })
role_name: string;
@OneToMany(type => UserRole, userRole => userRole.role)
userRoles: UserRole[];
}
中间表实体 roleUser.entity.ts (主健)
import { Entity, PrimaryGeneratedColumn, JoinColumn, Column, CreateDateColumn, UpdateDateColumn, ManyToOne } from ‘typeorm‘;
import { BaseEntity } from ‘../../../common/base/base.entity‘;
import { User } from ‘../../web/user/user.entity‘;
import { Role } from ‘./role.entity‘;
@Entity()
export class UserRole {
@PrimaryGeneratedColumn()
public id: number;
@CreateDateColumn()
created_time: Date;
@UpdateDateColumn()
updated_time: Date;
@ManyToOne(type => User, user => user.userRoles)
@JoinColumn({name: ‘user_id‘})
user: User;
@ManyToOne(type => Role, role => role.userRoles)
@JoinColumn({name: ‘role_id‘})
role: Role;
}
中间表定义roleUser.entity.ts(复合主键)
import { Entity, PrimaryGeneratedColumn, JoinColumn, Column, CreateDateColumn, UpdateDateColumn, ManyToOne } from ‘typeorm‘;
import { BaseEntity } from ‘../../../common/base/base.entity‘;
import { User } from ‘../../web/user/user.entity‘;
import { Role } from ‘./role.entity‘;
@Entity()
export class UserRole {
@CreateDateColumn()
created_time: Date;
@UpdateDateColumn()
updated_time: Date;
@ManyToOne(type => User, user => user.userRoles, { primary: true })
@JoinColumn({name: ‘user_id‘})
user: User;
@ManyToOne(type => Role, role => role.userRoles, { primary: true })
@JoinColumn({name: ‘role_id‘})
role: Role;
}
二、无中间表的多对多实体定义，又分为单向和双向，单向是仅在一侧与关系装饰器的关系， 双向是与关系两侧的装饰者的关系。具体官网文档：https://typeorm.io/#/relations，此处主要讲双向
角色实体
import { Entity, Column, ManyToMany, OneToMany, JoinTable, JoinColumn } from ‘typeorm‘;
import { BaseEntity } from ‘../../../common/base/base.entity‘;
import { User } from ‘../../web/user/user.entity‘;
@Entity(‘role‘)
export class Role extends BaseEntity {
@Column({ length: 100 })
role_name: string;
@Column({ length: 100 })
remark: string;
// 无中间实体表的配置
@ManyToMany(type => User, user => user.roles, { cascade: true })
users: User[];
}
用户实体
import { Entity, Column, Index, ManyToMany, JoinColumn, OneToMany, JoinTable, PrimaryGeneratedColumn, CreateDateColumn, UpdateDateColumn } from ‘typeorm‘;
import { Role } from ‘../../admin/role/role.entity‘;
@Entity()
export class User {
@PrimaryGeneratedColumn()
id: number;
@Column({ length: 100 })
@Index({ unique: true })
name: string;
// 无中间实体表的配置
@ManyToMany(type => Role, role => role.users)
@JoinTable({
name: ‘user_role‘,
joinColumns: [
{name: ‘user_id‘}
],
inverseJoinColumns: [
{name: ‘role_id‘}
]
})
// 下面的定义也能实现
// @JoinTable({
// name: ‘user_role‘,
// joinColumn: { name: ‘user_id‘ },
// inverseJoinColumn: { name: ‘role_id‘ },
// })
roles: Role[];
}
标签：style 自定义 gen 角色 create 实体 权限管理 script common
原文地址：https://www.cnblogs.com/terrylin/p/11283896.html
