我有一个网站,可以让用户添加或删除自己喜欢的书籍。我在页面的每一行添加了“添加”和“删除”按钮。我可以在会话数组中添加喜爱的书籍,没有任何问题。但我无法从“用户最喜欢的图书清单”中删除一行。
我使用了jquery,ajax。我可以取消行但我想要的是完全从会话中删除该行并再次订购。尽管我取消了行,但会话的元素数不会改变。
这是代码:
//There are rows in $newdata. That is to say, newdata array is not empty now.
// I just add newdata array here to show that there is an array called newdata.
var $newdata = array();
function delete_row($rowid) {
if (isset($rowid)) {
$this->newdata = $this->session->userdata('contents');
unset($this->newdata[$rowid]['id']);
unset($this->newdata[$rowid]['name']);
unset($this->newdata[$rowid]['author']);
unset($this->newdata[$rowid]['year']);
$this->session->set_userdata(array('contents' => $this->newdata));
$contents = $this->session->userdata('contents');
$i = 0;
foreach ($contents as $key)
{
if ($key['id'] != "") {
$i++;
$this->newdata[$i]['id'] = $key['id'];
$this->newdata[$i]['name'] = $key['name'];
$this->newdata[$i]['author'] =$key['author'];
$this->newdata[$i]['year'] =$key['year'];
} else {
}
}
$this->session->set_userdata(array('contents' => $this->newdata));
} else {
echo "There is no row to be deleted";
}
}
这是视图代码(html):
<div>
<?php
if (count($contents)==0) {
echo 'There is no favorite book';
} else {
echo '<table class="table table-striped">';
$i = 0;
echo count($contents);
foreach ($contents as $items) {
echo '<tr>';
echo '<td>'.$items['id'].'</td>';
echo '<td>'.$items['name'].'</td>';
echo '<td>'.$items['author'].'</td>';
echo '<td>'.$items['year'].'</td>';
echo '<td><button id='.$i .' class="delete_row"><b>DELETE</b></button></td>';
echo '</tr>';
$i++;
}
echo '</table>';
}
?>
</div>
这是jquery代码:
$('.delete_row').click(function(event) {
event.preventDefault();
var id = $(this).attr("id");
window.location.href = '/favorite/delete_row/'+id;
});
答案 0 :(得分:1)
我认为问题在于del按钮id。您使用的是$i
变量而不是$items['id']
。所以JS重定向会将count int而不是item id
发送到删除页面。
变化:
echo '<td><button id='. $i .' class="delete_row"><b>DELETE</b></button></td>';
分为:
echo '<td><button id='. $items['id'] .' class="delete_row"><b>DELETE</b></button></td>';