我正在使用引导程序构建表单，但是当单击提交按钮时，没有 POST 数据发送到我的后端服务器。
Front的代码是：
<form class="form-horizontal" id="level_form" method="post" action="" data-confirm="Ready to submit?">
<div class="control-group">
<label class="control-label" for="startDate"></label>
<div class="controls">
<input type="date" id="startDate">
<span class="label label-important hidden" id="startDateHelper"></span>
</div>
</div>
<div class="control-group">
<label class="control-label" for="stopDate"></label>
<div class="controls">
<input type="date" id="stopDate">
<span class="label label-important hidden" id="stopDateHelper"></span>
</div>
</div>
<div class="form-actions">
<button type="submit" class="btn btn-primary">submit</button>
<button type="button" class="btn">preview</button>
</div>
</form>
后端是：
app.use(express.bodyParser());
app.engine('html', cons.mustache);
app.set('view engine', 'html');
app.set('views', __dirname+'/views');
app.use(express.static(__dirname + '/public'));
app.use(express.basicAuth(function(user, pass){
return user == 'admin' && pass == 'solid'
}));
app.use(app.router);
app.get('/', function(req, res){
res.render('index', {});
});
app.get('/new_level', function(req, res){
res.render('level_editor', {action_url:'/new_level'});
});
app.post('/new_level', function(req, res){
console.log(req.body);
res.send(req.body);
});
但我得到的只是一个'{}'，我哪里做错了？html部分还是节点部分？