Node.js表示post參數總是未定義的

Question

我是Node.js開發的新手，我知道有幾個像這樣的堆棧溢出問題，不幸的是似乎沒有解決我的問題。 所以我覺得我能做的就是問我的問題

所以我使用Node.js和Express以及Jade視圖引擎。

我基於這篇文章編寫了一些代碼： http ： //howtonode.org/express-mongodb

無論如何這里是我的

節點應用：

var express = require('express');
var home = require('./routes/home');
var d3demo = require('./routes/d3demo');
var PersonProvider = require('./public/javascripts/personProvider').PersonProvider;
var personProvider = new PersonProvider('localhost', 27017);
var LinkProvider = require('./public/javascripts/linkProvider').LinkProvider;
var linkProvider = new LinkProvider('localhost', 27017);


var http = require('http');
var path = require('path');
var app = express();

//=============================================================================
//    EXPRESS SETUP
//=============================================================================
app.configure(function(){
  app.set('port', process.env.PORT || 2000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.favicon());
  app.use(express.logger('dev'));
  //app.use(require('connect').bodyParser());
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(app.router);
  app.use(require('stylus').middleware(__dirname + '/public'));
  app.use(express.static(path.join(__dirname, 'public')));
});

app.configure('development', function () {
    app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});

app.configure('production', function () {
    app.use(express.errorHandler());
});


//=============================================================================
//    ROUTING
//=============================================================================
app.get('/home', function (req, res) {
    home.homeGet(req, res, commonHelper, personProvider, linkProvider);
});

app.post('/home', function (req, res) {
    home.homePost(req, res, personProvider);
});


var server = http.createServer(app);


server.listen(app.get('port'), function(){
    console.log("Express server listening on port " + app.get('port'));
});

這是家庭路線

/*
 * GET home page.
 */

exports.homeGet = function(req, res, commonHelper, personProvider, linkProvider){
        commonHelper.seedData(personProvider, linkProvider, function() {
        res.render('home');
    });
};

exports.homePost = function (req, res, personProvider) {

    var newUserEmail = req.body.email;
    console.log(req.body.length);


    //console.log(x);

    //var email = req.param('Email');
    console.log("/Home posted Email :" + newUserEmail);

    personProvider.save({
        //email: req.param('Email'),
        email: newUserEmail,
    }, function (error, docs) {
        if(error == null) {
            res.redirect('/d3demo');
        } else {
            res.render('home');
        }
    });

};

這是玉的觀點

extends layout

block head
  link(rel='stylesheet', href='/stylesheets/home.css')
  script(src='/javascripts/home.js')

block content
  form(method='post', id='homeForm', action='http://localhost:2000/home')
    div(id='dialog', title='error', style='display:none;')
      p You need to supply a valid email
    div(id='NewDetailsArea')
      p Enter your email address, and then click enter 
      | <input type="text" id="email" class="email"></input>
      div#homeSubmit
        input(type='submit', value='Enter', id='enterEmail')

哪個被渲染到這個

<form method="post" id="homeForm" action="http://localhost:2000/home">
  <div id="dialog" title="error" style="display:none;">
    <p>You need to supply a valid email</p></div>
    <div id="NewDetailsArea">
      <p>Enter your email address, and then click enter </p>
      <input type="text" id="email" class="email">
      </input><div id="homeSubmit"><input type="submit" value="Enter" id="enterEmail">
    </div>
  </div>
</form>

所以問題是：

那問題其實很簡單。 在功能內

homePost = function（req，res，personProvider）

我希望能夠獲得'email'表單字段的值

我試過req.param（'email'），req.body.email我試過標准的express.bodyParser（）和連接（有人在另一個回答中提到）一個需要（'connect'）。bodyParser（）但是我得到的所有內容都是未定義的。

此外，如果我嘗試和console.log（req.body）我得到undefined

我究竟做錯了什么？

Answer 1

您需要為電子郵件輸入提供name屬性。 name是表單提交時發送的內容：

<input type="text" id="email" name="email" class="email">