nodejs express mongoose mongodb

Question

我创建了一个路由作为验证我所有的路由，我希望这能够处理所有请求并验证它们，问题是我想检查属性是否在请求中，而不是数据只是属性，让我们说用户有一个电子邮件，但其他人没有，我想检查身体是否有电子邮件属性运行某些代码来验证此电子邮件。

我怎么知道，如果

req.body.email; 

在身体？

var express = require('express'); 
var router = express.Router(); 


router.use('/', function(req, res, next) { 
      var record = req.body.record, 
       email = record.email, 
       phone_number = record.phone_number, 
       school_id = req.body.schoolId; 

      console.log("validator"); 

      if (record) { 

       if (what is the condition here to check 
        if the body has email) 

        req.asyncValidationErrors() 
        .then(function() { 
         next(); 

        }).catch(function(errors) { 
         if (errors) { 
          res.json({ 
           status: "error", 
           message: "please make sure your data is correct and your email and phone number are not valid" 
          }); 
          return; 
         } 
        }); 
      }); 


     module.exports = router; 

Answer 1

要知道email是否在身上，你需要检查undefined。访问时，不在身体内的属性将为您提供undefined。

if (body.email === undefined) { 
    console.log('email attribute is not in the body, hence it comes here'); 
    return res.json({ 
     status: "error", 
     message: "please make sure your data is correct and your email is valid" 
    }); 
} 

如果你已经在你的应用程序中登录。

let _ = require('lodash'); 

let body = req.body; 

if(_.isUndefined(body.email)) { 
    console.log('email attribute is not in the body, hence it comes here'); 
    return res.json({ 
     status: "error", 
     message: "please make sure your data is correct and your email is valid" 
    }); 
} 

Answer 2

尝试使用npm express-validator来对中间件进行所有验证。

https://www.npmjs.com/package/express-validator