<script type="text/javascript">

			jQuery(function($){

				$('.dd').nestable();

				$('.dd-handle a').on('mousedown', function(e){

					e.stopPropagation();

				});

				$('[data-rel="tooltip"]').tooltip();

				 $('#nestable').nestable().on('change', function(){

					 var r = $('.dd').nestable('serialize');

					 $("#xx").html(JSON.stringify(r));	//改变排序之后的数据

				});

				 $('#nestable').nestable().on('change', updateOutput);

			});

		</script>

<script type="text/javascript">

	jQuery(function($){

		var courseID = '{$course_id}';

		$('.dd').nestable();

		$('.dd-handle a').on('mousedown', function(e){

			e.stopPropagation();

		});

		$('[data-rel="tooltip"]').tooltip();

		$('#nestable').nestable().on('change', function(){

			var r = $('.dd').nestable('serialize');

			console.log(11);

			console.log(JSON.stringify(r));

			$.ajax({

				type: 'POST',

				url: "__URL__/updateSort",

				data: {jsonData:JSON.stringify(r),courseId:courseID},

				success:function(result){

					//console.log(result);

					window.location.reload();

				}});

			$("#xx").html(JSON.stringify(r));	//改变排序之后的数据

		});

		$('#nestable').nestable().on('change', updateOutput);

	});

</script>

    public function updateSort(){

        //$data = '[{"id":605,"children":[{"id":4093},{"id":4095},{"id":4094},{"id":4096},{"id":4097},{"id":4098},{"id":4099},{"id":4100},{"id":4101},{"id":4102},{"id":4103},{"id":4104},{"id":4105},{"id":4106},{"id":4107},{"id":4108},{"id":4109},{"id":4110},{"id":4111},{"id":4112}]}]';

        $data = $_POST['jsonData'];

        //$data = '[{"id":553,"children":[{"id":3769},{"id":3768},{"id":3770},{"id":3771},{"id":3772},{"id":3773},{"id":3774},{"id":3775},{"id":3776},{"id":3777},{"id":3778}]}]';

        $data = json_decode($data);

        //var_dump($data);

        $courseId = $_POST['courseId'];

        //$courseId = 343;

        $chapterId = $data[0]->id;

        //$chapterId = 553;

        $childrenData = $data[0]->children;

        try{

            foreach($childrenData as $key=>$item){

                echo $item->id."--".$key."<br/>";

                M('CourseChapterSection')->where(array('course_id'=>$courseId,'chapter_id'=>$chapterId,'section_id'=>$item->id))->data(array('s_sort'=>$key))->save();

            }

            echo 1;

        }catch(\Exception $e){

            echo 0;

        }

    }