AJAX live插入删除搜索，显示项目2次
AJAX live插入删除搜索，显示项目2次
提问于 2016-06-23 11:51:57
当我插入一个项目时，它在列表中显示了2次，但在mysql表中它只注册了一次。它是在我开始使用会话时开始的。提前谢谢你。
index.php
<html>
<head>
<title>Live Table Data Edit</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
</head>
<body>
<div class="container">
<br />
<br />
<br />
<div class="table-responsive">
<h3 align="center">Lista articulos prestados</h3><br />
<div id="live_data"></div>
</div>
</div>
</body>
</html>
<script>
$(document).ready(function(){
function fetch_data()
{
$.ajax({
url:"select.php",
method:"POST",
success:function(data){
$('#live_data').html(data);
}
});
}
fetch_data();
$(document).on('click', '#btn_add', function(){
var Articulo = $('#Articulo').text();
var fecha = $('#fecha').text();
var emailpresta = $('#emailpresta').text();
var emailrecibe = $('#emailrecibe').text();
if(Articulo == '')
{
alert("Ingresa Articulo");
return false;
}
if(fecha == '')
{
alert("Ingresa Fecha");
return false;
}
if(emailpresta == '')
{
alert("Ingresa tu email");
return false;
}
if(emailrecibe == '')
{
alert("Ingresa email tercero");
return false;
}
$.ajax({
url:"insert.php",
method:"POST",
data:{Articulo:Articulo, fecha:fecha, emailpresta:emailpresta, emailrecibe:emailrecibe },
dataType:"text",
success:function(data)
{
alert(data);
fetch_data();
}
})
});
$(document).on('click', '.btn_delete', function(){
var id=$(this).data("id3");
if(confirm("Are you sure you want to delete this?"))
{
$.ajax({
url:"delete.php",
method:"POST",
data:{id:id},
dataType:"text",
success:function(data){
alert(data);
fetch_data();
}
});
}
});
});
</script> select.php
<?php
session_start();
$check_usuario = $_SESSION['email'];
$connect = mysqli_connect("######", "######", "", "############");
$output = '';
$sql = "SELECT * FROM articulos INNER JOIN usuarios WHERE emailpresta='".$check_usuario."'";
$result = mysqli_query($connect, $sql);
$output .= '
<div class="table-responsive">
<table class="table table-bordered">
<tr>
<th width="10%">Id</th>
<th width="40%">Articulo</th>
<th width="40%">Fecha(Formato: AAAA-MM-DD)</th>
<th width="40%">Email-presta</th>
<th width="40%">Email-recibe</th>
<th width="10%">Borrar</th>
</tr>';
if(mysqli_num_rows($result) > 0)
{
while($row = mysqli_fetch_array($result))
{
$output .= '
<tr>
<td>'.$row["id"].'</td>
<td class="Articulo" data-id1="'.$row["id"].'" contenteditable>'.$row["Articulo"].'</td>
<td class="fecha" data-id2="'.$row["id"].'" contenteditable>'.$row["fecha"].'</td>
<td class="emailpresta" data-id2="'.$row["id"].'" contenteditable>'.$row["emailpresta"].'</td>
<td class="emailrecibe" data-id2="'.$row["id"].'" contenteditable>'.$row["emailrecibe"].'</td>
<td><button type="button" name="delete_btn" data- id3="'.$row["id"].'" class="btn btn-xs btn-danger btn_delete">x</button></td>
</tr>
';
}
$output .= '
<tr>
<td></td>
<td id="Articulo" contenteditable></td>
<td id="fecha" contenteditable></td>
<td id="emailpresta" contenteditable></td>
<td id="emailrecibe" contenteditable></td>
<td><button type="button" name="btn_add" id="btn_add" class="btn btn-xs btn-success">+</button></td>
</tr>
';
}
else
{
$output .= '<tr>
<td></td>
<td id="Articulo" contenteditable></td>
<td id="fecha" contenteditable></td>
<td id="emailpresta" contenteditable></td>
<td id="emailrecibe" contenteditable></td>
<td><button type="button" name="btn_add" id="btn_add" class="btn btn-xs btn-success">+</button></td>
</tr>';
}
$output .= '</table>
</div>';
echo $output;
?> insert.php
<?php
session_start();
$connect = mysqli_connect("############", "############", "", "############");
$sql = "INSERT INTO articulos(Articulo, fecha, emailpresta, emailrecibe) VALUES('".$_POST["Articulo"]."', '".$_POST["fecha"]."'
, '".$_POST["emailpresta"]."', '".$_POST["emailrecibe"]."')";
if(mysqli_query($connect, $sql))
{
echo 'Data Inserted';
}
?> delete.php
<?php
session_start();
$connect = mysqli_connect("############", "############", "", "############");
$sql = "DELETE FROM articulos WHERE id = '".$_POST["id"]."'";
if(mysqli_query($connect, $sql))
{
echo 'Data Deleted';
}
?> 回答 1
Stack Overflow用户
发布于 2016-06-23 12:24:46
问题可能出在您的MySQL查询上。执行以下命令时，屏幕上会显示什么内容：
//session_start(); <-- do not start session
$email = '......'; <-- use an email from the DB with data available
$sql = "SELECT * FROM articulos INNER JOIN usuarios
WHERE emailpresta='$email'";
$connect = mysqli_connect(...);
$result = mysqli_query($connect,$sql);
$data = mysqli_fetch_all($result));
print_r($data);您是否看到重复的行？如果是这样，您将需要处理您的SQL查询。具体地说，您没有告诉数据库如何连接articulos和usarios表。而不是
SELECT * from articulos INNER JOIN usarios WHERE emailpresta='$email'你可能需要类似这样的东西：
SELECT * from articulos INNER JOIN usarios ON articulos.userID=usarios.ID
WHERE usarios.emailpresta='$email'使用匹配的两个表中的字段，而不是articulos.userID和usarios.ID。您可以了解一些有关内连接here的知识
附注
我注意到您将$_SESSION['email']直接插入到DB查询中。如果这是您从用户那里收到的值，那么您将面临巨大的SQL injection attack风险，这是一种任何人都可以使用精心设计的输入执行任何查询(包括提取、修改或删除数据库记录)的方式。请考虑使用parameterized queries。即使$_SESSION['email']的内容是安全的，在从用户获取输入的任何地方运行原始查询也是一种危险的习惯。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/37982026
复制相关文章
相似问题
腾讯云开发者
Copyright © 2013 - 2026 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有
深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 
粤公网安备44030502008569号
腾讯云计算（北京）有限责任公司 京ICP证150476号 | 京ICP备11018762号