javascript - 在express.js中，res.render()不起作用

Question

我正在制作一个使用 Facebook 登录的简单网络应用程序。

如果我页面上的 Facebook 登录按钮被点击，

FB.api(
  '/me',
      'GET',
      {"fields":"id,name,birthday,gender"},
      function(response) {
        $.post('fb_login', response, "json");
      }
    );

被调用，并且路由器处理'/fb_login'请求；在路由器中，服务器检查 json 对象的 id 是否已在其数据库中。如果没有，则应调用 res.render('signup', ...) 。然而它没有用。我已经检查了 res.render() 被调用，但页面“signup.jade”没有显示。

这是我的路由器源代码。

var express = require('express');
var router = express.Router();
var mysql = require('mysql');
var pool = mysql.createPool({
    host: 'localhost',
    user: 'root',
    password: '1012'
});

/* GET home page. */
router.post('/', function(req, res, next) {
var userid = req.body.id;
if (userid) {
    pool.getConnection(function(err, connection) {
        if (err) {
            console.error('DB Connection error!!');
            return;
        }
        console.log('DB Connection Success!!');
        connection.query('use vasket');
        connection.query('select count(*) result from user where userID=?', 
        [userid], function(err, result, field) {
            var isAlreadyUser = result[0].result;
            console.log(isAlreadyUser);
            if (isAlreadyUser == 1) {
                req.session.userid = userid;
                res.redirect('/');
                res.end();
                console.log('DB FB Login Success!!');
                connection.release();
            }
            else {
                connection.release();
                console.log('FIRST TIME!');
                //This method was called, but the page rendered didn't 
                res.render('signup', {id: req.body.id, name: req.body.name, birthday: req.body.birthday, gender: req.body.gender});
            }
        });
    });
} else {
    res.redirect('/');
    res.end();
}

如何修复它？

Answer 1

为了帮助调试，也许您可​​以这样修改代码:

// ... your code before

            else {
                connection.release();
                console.log('FIRST TIME!');


                console.log(req.body);


                //This method was called, but the page rendered didn't 
                res.render(
                  'signup', 
                  {
                    id      : req.body.id, 
                    name    : req.body.name, 
                    birthday: req.body.birthday, 
                    gender  : req.body.gender
                  } ,
                  function(err, html){
                    if(err) console.log(err);

                    console.log(html);                        
                    //res.send(html);
                    // trying same but forcing status
                    res.status(200).send(html);
                  }
                );
            }
        });
    });
} else {
    res.redirect('/');
    res.end();
}