Question

我试图通过使用ajax和序列化哈希来获取选择菜单show hide。昨晚我让这个系统正常工作，但是我把#selector从一个表单改成了一个div，然后突然停止了运行。我不得不扩大关于帖子的附加数据的表格，并且不想一次序列化所有数据，因为这将对系统造成额外的压力。

该页面有点按预期工作。它显示了第一个选择，允许我选择一个选项，我可以看到AJAX发布但是哈希值是空的，我相信它打破了上面的PHP。我无法弄清楚为什么散列是空的。我认为它没有得到选择的价值，但我无法解决为什么..

如果有可能，请指出我哪里出错了？

<section id="add">
<div class="container">
    <form method="post">
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title"><strong>Step 1: Instance Select</strong></h3>
            </div>
            <div id="selector">
                <div class="panel-body">
                    <div class="col-md-6">
                        <select class="form-control box1" name="box1"></select>
                        <input name="box1hash" class="box1hash" type="hidden" />
                    </div>
                    <div class="col-md-6">
                        <select class="form-control box2" name="box2"></select>
                        <input name="box2hash" class="box2hash" type="hidden" />
                    </div>
                    <div class="col-md-6">
                        <select class="form-control box3" name="box3"></select>
                        <input name="box3hash" class="box3hash" type="hidden" />
                    </div>
                    <div class="col-md-6">
                        <select class="form-control box4" name="box4"></select>
                        <input name="box4hash" class="box4hash" type="hidden" />
                    </div>
                    <div class="col-md-6">
                        <select class="form-control box5" name="box5"></select>
                        <input name="box5hash" class="box5hash" type="hidden" />
                    </div>
                </div>
            </div>
        </div>
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title"><strong>Step 2: Event Details</strong></h3>
            </div>
            <div class="panel-body">
                <input name="event_name" type="text" class="form-control" />

            </div>
        </div>
        <input type="submit"/>
    </form>
</div>

        $(document).on('change', '#selector', function(e) {
            ajax_post(this);
        });

        ajax_post();

    })(jQuery);

    function show_hide_select(select){
        if ($(select).find('option').length < 1) {
            $(select).hide();
        } else {
            $(select).show();
        }
    }

    function ajax_post(element=null) {
        var frm = $('#selector');

        if (element != null) {
            // Reset selections
            var found=false;
            frm.find('select').each(function(e){
                if (found==true) {
                    $(this).hide().find('option:selected').prop("selected", false)
                }
                if (element==this) found=true;
            });
        }


        $.ajax({
        url: '?ajax=1',
        type: "POST",
        data: frm.serialize(),
        dataType: 'json',
            success: function (data) {

                if (data.box1hash != frm.find('.box1hash').val()) {
                    frm.find('.box1').html(data.box1?data.box1:'');
                    frm.find('.box1hash').val(data.box1hash);
                    show_hide_select(frm.find('.box1'));
                }

                if (data.box2hash != frm.find('.box2hash').val()) {
                    frm.find('.box2').html(data.box2?data.box2:'');
                    frm.find('.box2hash').val(data.box2hash);
                    show_hide_select(frm.find('.box2'));
                }

                if (data.box3hash != frm.find('.box3hash').val()) {
                    frm.find('.box3').html(data.box3?data.box3:'');
                    frm.find('.box3hash').val(data.box3hash);
                    show_hide_select(frm.find('.box3'));
                }

                if (data.box4hash != frm.find('.box4hash').val()) {
                    frm.find('.box4').html(data.box4?data.box4:'');
                    frm.find('.box4hash').val(data.box4hash);
                    show_hide_select(frm.find('.box4'));
                }

                if (data.box5hash != frm.find('.box5hash').val()) {
                    frm.find('.box5').html(data.box5?data.box5:'');
                    frm.find('.box5hash').val(data.box5hash);
                    show_hide_select(frm.find('.box5'));
                }

            }
        });
    }
</script>

Answer 1

与我之前的评论相反，表单标记不能嵌套在另一个表单标记中。 jquery serialize()仅适用于表单，因此不幸的是，它无法将其集中在表单的div组件上。相反，您可以将整个表单序列化为字符串，然后提取该字符串的子部分以减少ajax发布。下面的代码段内联评论......

＆＃13;

$('form').on({
 'change':function(e){
   e.preventDefault();
   var dats = $(this).serialize(); // serialize the whole form into a string
   var pico = dats.indexOf('&event_name='); // get the index of the end point of the desired data
   var newDats = dats.slice(0 , pico); // get the edited section for ajax submission
   $('#results').text(dats+' '+newDats);
   
 }
});

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<section id="add">
<div class="container">
    <form method="post" id='bob'>
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title"><strong>Step 1: Instance Select</strong></h3>
            </div>
            <div id="selector">
                <div class="panel-body">
                    <div class="col-md-6">
                        <select class="form-control box1" name="box1">
                        <option>a</option>
                        <option>b</option>
                        <option>c</option>
                        </select>
                        <input name="box1hash" class="box1hash" type="hidden" />
                    </div>
                    <div class="col-md-6">
                        <select class="form-control box2" name="box2"></select>
                        <input name="box2hash" class="box2hash" type="hidden" />
                    </div>
                    <div class="col-md-6">
                        <select class="form-control box3" name="box3"></select>
                        <input name="box3hash" class="box3hash" type="hidden" />
                    </div>
                    <div class="col-md-6">
                        <select class="form-control box4" name="box4"></select>
                        <input name="box4hash" class="box4hash" type="hidden" />
                    </div>
                    <div class="col-md-6">
                        <select class="form-control box5" name="box5"></select>
                        <input name="box5hash" class="box5hash" type="hidden" />
                    </div>
                </div>
            </div>
        </div>
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title"><strong>Step 2: Event Details</strong></h3>
            </div>
            <div class="panel-body">
                <input name="event_name" type="text" class="form-control" />

            </div>
        </div>
        <input type="submit"/>
    </form>
</div>

<p><tt id="results"></tt></p>

＆＃13;

jQuery show hide基于序列化哈希的选择菜单

1 个答案: