nodejs express mongoose mongodb

Question

我創建了一個路由作爲驗證我所有的路由，我希望這能夠處理所有請求並驗證它們，問題是我想檢查屬性是否在請求中，而不是數據只是屬性，讓我們說用戶有一個電子郵件，但其他人沒有，我想檢查身體是否有電子郵件屬性運行某些代碼來驗證此電子郵件。

我怎麼知道，如果

req.body.email; 

在身體？

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，你需要檢查undefined。訪問時，不在身體內的屬性將爲您提供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" 
    }); 
} 

如果你已經在你的應用程序中登錄。

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

嘗試使用npm express-validator來對中間件進行所有驗證。

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