如何从加载的JSON文件构建外部事件列表

我将JSON文件中的数据加载到我的Fullcalendar中没有问题，但我希望我的所有数据只显示在可拖动/可丢弃事件的外部列表上，然后用户决定将事件拖动到哪里（示例）

我确实实现了将数据加载到外部列表div。它显示正确，但当我将事件拖到日历中时，标题就会消失。如何避免数据丢失？

这是代码：

<script>
$(document).ready(function() {

    /* initialize the external events
    -----------------------------------------------------------------*/
    $('#external-events div.external-event').each(function() {
        // create an Event Object (http://arshaw.com/fullcalendar/docs/event_data/Event_Object/)
        // it doesn't need to have a start or end
        var eventObject = {
            title: $.trim($(this).text()) // use the element's text as the event title
        };
        // store the Event Object in the DOM element so we can get to it later
        $(this).data('eventObject', eventObject);
        // make the event draggable using jQuery UI
        $(this).draggable({
            zIndex: 999,
            revert: true,      // will cause the event to go back to its
            revertDuration: 0  //  original position after the drag
        });
    });

    /* initialize the calendar
    -----------------------------------------------------------------*/
    $('#calendar').fullCalendar({
        header: {
            left: 'prevYear,nextYear prev,next today',
            center: 'title',
            right: 'month,agendaWeek,agendaDay'
        },
        events: 'json/example.json',
        eventRender: function (event, element) {element.find('.fc-event-title').html(event.id);},
        eventClick: function(event) {
        if (event.url) {
            window.open(event.url);
            return false;
        }
        },
        editable: true,
        droppable: true, // this allows things to be dropped onto the calendar !!!
        drop: function(date, allDay) { // this function is called when something is dropped
            // retrieve the dropped element's stored Event Object
            var originalEventObject = $(this).data('eventObject');
            // we need to copy it, so that multiple events don't have a reference to the same object
            var copiedEventObject = $.extend({}, originalEventObject);
            // assign it the date that was reported
            copiedEventObject.start = date;
            copiedEventObject.allDay = allDay;
            // render the event on the calendar
            // the last `true` argument determines if the event "sticks" (http://arshaw.com/fullcalendar/docs/event_rendering/renderEvent/)
            $('#calendar').fullCalendar('renderEvent', copiedEventObject, true);
            // is the "remove after drop" checkbox checked?
            if ($('#drop-remove').is(':checked')) {
                // if so, remove the element from the "Draggable Events" list
                $(this).remove();
            }
        }
    });
});

体内divs:

<div id='wrap'>
<div id='external-events' style="display: none;">
<h4>Draggable Events</h4>
<div class='external-event' id="mec1"></div>
<div class='external-event' id="mec2"></div>
<div class='external-event'>My Event 3</div>
<div class='external-event'>My Event 4</div>
</div>
<div id='calendar'></div>
<div style='clear:both'></div>
 </div>

您可以看到，我还尝试使用外部JavaScript将JSON数据加载到div id"mec1"和div id"mec2"。这是成功的，但同样的情况。拖放后标题消失。

如果我把它们拖到div id＝'calendar'，标题就不会再显示了。

我的JSON文件只包含以下内容：

[
{
    "title" : "Blue Monday",
    "allDay" : false 
},
{
    "title" : "John de John",
    "allDay" : false 
},
{
    "title" : "Pumukli Pista",
    "allDay" : false 
} 
]

我希望我提供了足够的信息。提前感谢您在这方面的帮助。

我对fullcalendar和jQuery，js非常熟悉。我试图从这里解决这个问题