如何從角度ui選擇刪除重複的選項？

Question

這裏是我的角度UI選擇HTML：

<ui-select title="Select Template Directory" ng-change="searchTemplate()" theme="select2" ng-model="search_data.sub_directory" id="search_sub_directory" name="search_sub_directory" class="search_panel"> 
    <ui-select-match allow-clear="true" placeholder="Select Template Directory">{{$select.selected.subDirectory}}</ui-select-match> 
    <ui-select-choices repeat="template.subDirectory as template in response_template_directories | filter: $select.search"> 
     <span ng-bind-html="template.subDirectory | highlight: $select.search"></span> 
    </ui-select-choices> 
</ui-select> 

，這裏是response_template_directories

[ 
{subDirectory : 1}, 
{subDirectory : 1}, 
{subDirectory : 1}, 
{subDirectory : 1}, 
{subDirectory : 1}, 
{subDirectory : 1}, 
{subDirectory : 2}, 
{subDirectory : 3}, 
] 

選擇列表也顯示出重複

我怎樣才能在用戶界面中刪除這些重複選擇html？

Answer 1

使用過濾器唯一（從AngularUI執行或導入a8m/angular-filter）。

<ui-select title="Select Template Directory" ng-change="searchTemplate()" theme="select2" ng-model="search_data.sub_directory" id="search_sub_directory" name="search_sub_directory" class="search_panel"> 
<ui-select-match allow-clear="true" placeholder="Select Template Directory">{{$select.selected.subDirectory}}</ui-select-match> 
<ui-select-choices repeat="template.subDirectory as template in response_template_directories | unique: 'subDirectory' | filter: $select.search"> 
    <span ng-bind-html="template.subDirectory | highlight: $select.search"></span> 
</ui-select-choices> 

或寫lodash自己的過濾器：

app.filter('unique', function() { 
    return function (arr, field) { 
     return _.uniq(arr, function(a) { return a[field]; }); 
    }; 
});