Express http api中一致的错误验证响应，使用mongoose和Joi

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  name: {
    type: String,
    required: true,
    minlength: 3,
    maxlength: 50
  },
  email: {
    type: String,
    required: true,
    unique: true,
    validate: {
      validator: (value) => {
        // 自定义验证逻辑，例如验证邮箱格式
        return /\S+@\S+\.\S+/.test(value);
      },
      message: 'Invalid email format'
    }
  },
  password: {
    type: String,
    required: true,
    minlength: 6
  }
});

const User = mongoose.model('User', userSchema);

const express = require('express');
const router = express.Router();
const Joi = require('joi');

router.post('/users', (req, res) => {
  const schema = Joi.object({
    name: Joi.string().min(3).max(50).required(),
    email: Joi.string().email().required(),
    password: Joi.string().min(6).required()
  });

  const { error } = schema.validate(req.body);
  if (error) {
    return res.status(400).json({ error: error.details[0].message });
  }

  // 验证通过，创建用户
  // ...
});