我在 AJAX 调用上的点击事件有问题。我有嵌套的 AJAX 调用,因为单击事件发生在第一个 AJAX 调用之前不存在的 div 上。基本上我正在从数据库中加载用户评论,然后评论上有一个上下投票按钮。这些是第二个 ajax 调用。你可以在这里看到 JS:
//FIRST LOAD THE COMMENTS WITH THE FIRST AJAX CALL
$('.comments_submit').each(function(){
var comments_text = $(this).parent().find('textarea').val();
var video_id = $(this).closest('div.home_video').find('.video').attr('id');
var myData = 'body=' + comments_text + '&video_id=' + video_id + '&type=load';
var that = this;
$.ajax({
type: 'POST', // HTTP method POST or GET
url: 'comments_ajax.php', //Where to make Ajax calls
dataType:'text', // Data type, HTML, json etc.
data:myData, //post variables
success:function(response){
//UPON SUCCESSFULLY LOADING THE COMMENTS / BIND CLICK EVENT TO VOTE UP AND VOTE DOWN
$(that).closest('div.home_video').find('.comments_list').html(response);
$('.vote_link.down').each(function(){
$(this).click(function(){
var comment_id = $(this).closest('.comment_box').attr('id');
//MAKE AJAX CALL TO SUBMIT COMMENTS
var myData = 'comment_id=' + comment_id + '&type=vote_down';
var that = this;
$.ajax({
type: 'POST', // HTTP method POST or GET
url: 'comments_ajax.php', //Where to make Ajax calls
dataType:'text', // Data type, HTML, json etc.
data:myData, //post variables
success:function(response){
//REFORMAT UPON SUCCESSFUL AJAX CALL
$(that).text(response);
},
error:function (xhr, ajaxOptions, thrownError){
alert('didnt work'); //throw any errors
}
});
});
});
$('.vote_link.up').each(function(){
$(this).click(function(){
var comment_id = $(this).closest('.comment_box').attr('id');
//MAKE AJAX CALL TO SUBMIT COMMENTS
var myData = 'comment_id=' + comment_id + '&type=vote_up';
var that = this;
$.ajax({
type: 'POST', // HTTP method POST or GET
url: 'comments_ajax.php', //Where to make Ajax calls
dataType:'text', // Data type, HTML, json etc.
data:myData, //post variables
success:function(response){
//REFORMAT UPON SUCCESSFUL AJAX CALL
$(that).text(response);
},
error:function (xhr, ajaxOptions, thrownError){
alert('didnt work'); //throw any errors
}
});
});
});
},
error:function (xhr, ajaxOptions, thrownError){
alert('didnt work'); //throw any errors
}
});
});
评论加载的服务器端代码是:
if($_POST['type']=="load"){
$sql_select = "SELECT * FROM comments WHERE video_id = '$video_id' ORDER BY timestamp DESC LIMIT 7";
$result_select = $mysqli->query($sql_select);
while($row = mysqli_fetch_array($result_select)){
echo "<div class='comment_box' id='".$row['id']."'>".$row['body']."
<div class='votes'>
<a class='vote_link up'>UP (".$row['vote_up'].")</a>
<a class='vote_link down'>DOWN (".$row['vote_down'].")</a>
</div>
</div>";
}
}
投票支持的服务器端代码(与投票反对代码几乎相同):
if($_POST['type']=="vote_up"){
$comment_id = $_POST['comment_id'];
$sql_select = "SELECT * FROM comments WHERE id = '$comment_id'";
$result_select = $mysqli->query($sql_select);
$row = mysqli_fetch_array($result_select);
$votes = $row['vote_up'] + 1;
$sql_update = "UPDATE comments SET vote_up = '$votes' WHERE id = '$comment_id'";
$result_update = $mysqli->query($sql_update);
$sql_select = "SELECT * FROM comments WHERE id = '$comment_id'";
$result_select = $mysqli->query($sql_select);
$row_vote = mysqli_fetch_array($result_select);
echo "
UP (".$row_vote['vote_up'].")
";
}
几件事。当我单击该按钮时,出于某种原因,它会在 UP 或 DOWN 字段中添加多个赞成票。但它也会取消绑定点击事件。
我以前从未嵌套过 AJAX 调用,所以在第一个函数发生后可能有更好的方法来绑定 AJAX 函数?谢谢你的帮助!