我使用angularjs-dropdown-multiselect来过滤来自表格的所选数据。但它不起作用。 HTML：
<body ng-controller="MainCtrl">
<div class="form-group">
<div class="col-md-2 col-sm-2 col-xs-12 margin-left">
<label class="control-label">Year</label>
<div ng-dropdown-multiselect="" options="yearOption" selected-model="yearSelected"></div>
</div>
<div class="col-md-2 col-sm-2 col-xs-12 margin-left">
<label class="control-label">Month</label>
<div ng-dropdown-multiselect="" options="example1data" selected-model="example1model"></div>
</div>
</div>
<br> <br>
<div id="datatable-buttons_wrapper" class="dataTables_wrapper form-inline dt-bootstrap no-footer">
<!--page size-->
<div class="table-search-bar">
<div class="dt-buttons btn-group">
PageSize:
<select ng-model="entryLimit" class="form-control">
<option>5</option>
<option>10</option>
<option>20</option>
<option>50</option>
<option>100</option>
</select>
</div>
<!--filter-->
<div id="datatable-buttons_filter" class="dataTables_filter"><label>Filtered:<input type="text" ng-model="search" ng-change="filter()" placeholder="Filter" class="form-control input-sm" aria-controls="datatable-buttons" /></label></div>
</div>
<div ng-show="filteredItems > 0">
<table id="datatable-buttons" class="table table-striped table-bordered">
<thead>
<th><a ng-click="sort_by('year');">Year </a></th>
<th><a ng-click="sort_by('month');">Month </a></th>
<th><a ng-click="sort_by('country');">Country </a></th>
<th><a ng-click="sort_by('mobile_operator');">Mobile Operator </a></th>
<th><a ng-click="sort_by('service');">Service </a></th>
<th>Action</th>
</thead>
<tbody ng-init="get_product()">
<tr ng-repeat="product in filtered = (pagedItems| filter:search | orderBy : predicate :reverse) | limitTo:entryLimit ">
<td>{{ product.year}} </td>
<td>{{ product.month}}</td>
<td>{{ product.country}}</td>
<td>{{ product.mobile_operator}}</td>
<td>{{ product.service}}</td>
<td><a href="" ng-click="prod_update(product.id)">Update</a></td>
</tr>
</tbody>
</table>
<!--total result out of-->
<div class="dataTables_info" id="datatable-buttons_info" >
Page {{currentPage + 1}} of {{numberOfPages}} <!--Showing {{ filtered.length}} of {{ totalItems}} entries-->
</div>
<!--pagination-->
<div ng-show="filteredItems > 0">
<button class="btn" ng-disabled="currentPage <= 0" ng-click="currentPage = currentPage - 1"><<</button>
<!-- <button class="btn" ng-disabled="currentPage == 0" ng-click="currentPage = 0">1</button>
<button class="btn" ng-disabled="currentPage == 1" ng-click="currentPage = 1">2</button>....
<button class="btn" ng-disabled="currentPage == numberOfPages - 1" ng-click="currentPage = numberOfPages - 1">{{numberOfPages - 1}}</button>
<button class="btn" ng-disabled="currentPage == numberOfPages" ng-click="currentPage = numberOfPages">{{numberOfPages}}</button>-->
<button class="btn" ng-disabled="currentPage >= numberOfPages" ng-click="currentPage = currentPage + 1">>></button>
</div>
</div>
<div ng-show="filteredItems == 0">
<div class="col-md-12">
<h4 class="center-margin">No Role found</h4>
</div>
</div>
</div>
</body>
要求：
当我选择多个下拉元素然后同时过滤数据时。