如何使用mongoose为用户分配用户角色

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const roleSchema = new Schema({
  name: { type: String, required: true },
  permissions: { type: [String], required: true },
});

const Role = mongoose.model('Role', roleSchema);

module.exports = Role;

const mongoose = require('mongoose');
const User = require('./models/User');
const Role = require('./models/Role');

// 获取用户角色信息
const userRole = await Role.findOne({ name: 'user' });

// 创建新用户
const newUser = new User({
  username: 'example',
  password: 'password',
  role: userRole._id, // 分配用户角色
});

// 保存用户到数据库
await newUser.save();

const mongoose = require('mongoose');
const User = require('./models/User');
const Role = require('./models/Role');

// 获取用户信息
const user = await User.findOne({ username: 'example' }).populate('role');

// 获取用户角色的权限
const rolePermissions = user.role.permissions;

// 检查用户是否具有某个权限
const hasPermission = rolePermissions.includes('createPost');

if (hasPermission) {
  // 执行具有权限的操作
} else {
  // 显示无权限的提示或进行其他处理
}