【发布时间】：2017-08-04 14:48:56
【问题描述】：
我正在尝试在使用 mongoose 从数据库中检索元素后删除它们。但是，我被困在我不知道如何“抓取”列表中的一个特定元素然后如何删除它的部分。
在我的应用中，我有一个用户列表和他们的年龄。 这是我的 userview.ejs（添加 frontend.js 后编辑）
<meta charset="UTF8">
<link href="../public/javascripts/frontend.js">
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet" href="/stylesheets/userlist.css">
<link href='//fonts.googleapis.com/css?family=Amatic SC' rel='stylesheet'>
<link href='//fonts.googleapis.com/css?family=NTR' rel='stylesheet'>
<html>
<head>
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<title>Userlist</title>
<script src="javascripts/frontend.js"></script>
<script>
</script>
</head>
<div class="container-fluid">
<div class="row">
<h1><strong>FORM</strong></h1>
<hr id="hr2" style="border: 6px solid palevioletred" >
<div id="black">
<form class="form-horizontal" method="post" action="/users">
<fieldset>
<!-- Text input-->
<div class="form-group">
<label class="col-md-4 control-label" for="textinput">Name : </label>
<div class="col-md-4">
<input id="textinput" name="name" placeholder="Enter Username" class="form-control input-md" type="text" value="Name" onfocus="if (this.value=='Name') this.value='';">
</div>
</div>
<!-- Text input-->
<div class="form-group">
<label class="col-md-4 control-label" for="textinput">Age : </label>
<div class="col-md-4">
<input id="textinput" name="age" placeholder="Enter Age" class="form-control input-md" type="number">
</div>
</div>
<!-- Button -->
<!-- Button (Double) -->
<div class="form-group">
<div class="col-md-8">
<button id="singlebutton" name="button1id" class="btn btn-success">Add User</button>
</div>
</div>
<body>
<h1><strong>USERS</strong></h1>
<hr id="hr1" style="border: 6px solid #7ec4ec;" >
<ul id="list" class="triangle">
<% for(var i=0; i<userlist.length; i++) {%>
<li><%= userlist[i].name %> : <%= userlist[i].age %> <a href="#" onclick="delete_element('<%= userlist[i]._id %>')" id="delete">Delete</a> || <a href="#" onclick="update_element()">Update</a></li>
<% } %>
</ul>
</body>
</fieldset>
</form>
</div>
</div>
</div>
</html>编辑：
这是我的 frontend.js
var $ = require('jquery');
function delete_element (userId) {
$.post('delete/user/',userId,function(){
alert('Deleting....'); //For now i have just added an alert.
});
}这是我的新 users.js
'use strict'
var express = require('express');
var router = express.Router();
var User=require('../models/usermodel.js');
var $= require('jquery');
/* GET users listing. */
router.get('/', function(req, res, next) {
User.find({},function(err,userModel){
res.render('userview',{userlist:userModel});
});
});
router.post('/', function(req, res, next) {
var newUser = new User({
name:req.body.name,
age: req.body.age
});
console.log(newUser);
// save the user
newUser.save(function(err) {
if (err) throw err;
console.log('User created!');
});
});
router.post("delete/user/:id", deleteUser);
function deleteUser(req,res){
User.findById(req.params.id).remove().exec(function(err){
if (!err) {
console.log('Removed Successfully');
}
else {
console.log('Error in removing the entry');
}
});
}
/*
function delete_element(id){
$('#delete').on("click",function(){
$(this).parent().remove();
});
User.remove({_id: req.body.id }, function(err) {
if (!err) {
console.log('Removed Successfully');
}
else {
console.log('Error in removing the entry');
}
});
}
*/
/*router.post('/', function(req, res, next) {
userModel.update( {name: req.params.name}, { $pullAll: {uid: [req.params.deleteUid] } } )
});*/
module.exports = router;【问题讨论】：
标签： javascript jquery node.js mongodb mongoose