如何在控制器中添加多个Nestjs RoleGuards

import { Controller, Get, UseGuards } from '@nestjs/common';
import { Roles } from './roles.decorator';
import { RoleGuard } from './role.guard';

export const Roles = (...roles: string[]) => SetMetadata('roles', roles);

import { Injectable, CanActivate, ExecutionContext } from '@nestjs/common';
import { Reflector } from '@nestjs/core';

@Injectable()
export class RoleGuard implements CanActivate {
  constructor(private reflector: Reflector) {}

  canActivate(context: ExecutionContext): boolean {
    const requiredRoles = this.reflector.get<string[]>('roles', context.getHandler());
    if (!requiredRoles) {
      return true; // 如果没有标记角色，则允许访问
    }

    const request = context.switchToHttp().getRequest();
    const user = request.user; // 假设已经通过身份验证并将用户信息存储在请求中

    // 检查用户是否具有所需的角色
    const hasRequiredRole = requiredRoles.some(role => user.roles.includes(role));
    return hasRequiredRole;
  }
}

@Controller('example')
export class ExampleController {
  @Get()
  @UseGuards(RoleGuard)
  @Roles('admin', 'user') // 标记需要的角色
  async exampleRoute() {
    // 处理路由逻辑
  }
}