typeorm 复合主键

https://github.com/typeorm/typeorm/issues/3657

import { Entity, PrimaryColumn, Column, ManyToOne, JoinColumn, Index } from "typeorm";

import { Role } from './Role';
import { Permission } from './Permission';

@Entity()
export class RolePermission {

    @PrimaryColumn({ name: 'role_id' })
    roleId?: number;

    @PrimaryColumn({ name: 'permission_id' })
    permissionId?: number;

    @ManyToOne(type => Role, role => role.rolePermissions)
    @JoinColumn({ name: "role_id", referencedColumnName: "id" })
    role: Role;

    @ManyToOne(type => Permission, Permission => Permission.rolePermissions)
    @JoinColumn({ name: "permission_id", referencedColumnName: "id" })
    permission: Permission;

}