javascript - jquery ajax 成功 php while

Question

为什么每次我成功的ajax请求时，输出都会为我的每个php while执行？我只想要其中一个具有 uniq id_cart 执行的。

HTML:

<ul>
<?php while { ?>
    <li class="changeweight">
        <form>
            <select name="changeq" class="<?php echo $datacart['id_cart']; ?>">
                  <option value="1">1</option>
                  <option value="2">2</option>
                  <option value="3">3</option>
            </select>
        </form>
    </li>
<?php } ?>
</ul>

AJax:

$("select[name=changeq]").change(function() {
    var selectq = $(this).val();
    var selectidcart = $(this).attr("class");
        $.ajax({
            context  : this,
            type     : "GET",
            url      : "ajax/changequantity.php",
            dataType : "json",
            data     : {idcart : selectidcart, q : selectq},
            success  : function(changeq) {
                $("li.changeweight").hide().html(changeq.totalweight).fadeIn('slow');
            }
        });
    });

changequantity.php:

<?php
$q = $_GET['q'];
$idcart = $_GET['idcart'];
     mysqli_query($connect,"UPDATE cart SET quantity = '$q' WHERE id_cart = '$idcart'");

     $cart = mysqli_query($connect,"SELECT * FROM cart WHERE id_cart = '$idcart'");
        $datacart = mysqli_fetch_assoc($cart);

        $product = mysqli_query($connect,"SELECT * FROM product WHERE id_product = '$datacart[id_product]'");
            $dataproduct = mysqli_fetch_assoc($product);

$totalweight = $datacart['quantity'] * $dataproduct['weight'];

echo json_encode(array("totalweight" => $totalweight));
?>

一切正常，数据存储在我的数据库上，但问题是 ajax 成功将适用于每个 php while li.changeweight。

这里出了什么问题？

非常感谢你。

Answer 1

您好，尝试使用当前对象并获取它的父对象

$("select[name=changeq]").change(function() {
    var self = this;
    var selectq = $(this).val();
    var selectidcart = $(this).attr("class");
        $.ajax({
            context  : this,
            type     : "GET",
            url      : "ajax/changequantity.php",
            dataType : "json",
            data     : {idcart : selectidcart, q : selectq},
            success  : function(changeq) {
                $(self).parent().parent().hide().html(changeq.totalweight).fadeIn('slow');
            }
        });
    });