javascript 未知提供者：uniqueFilterProvider 在 Angular.js 中使用唯一过滤器

Unknown provider: uniqueFilterProvider using unique filter in Angular.js

提问by user1159790

I am new to AngularJS. I am trying to implement filtering to build a unique list of options for the select box. My code is as follows

我是 AngularJS 的新手。我正在尝试实施过滤来为选择框构建一个唯一的选项列表。我的代码如下

<select name="show-filter" id="show-filter" ng-model="card" ng-options="v for v in currentOptions.cards  | unique:'cardno'">
<option value="">All</option>
</select>   

I am getting the following error

我收到以下错误

Error: Unknown provider: uniqueFilterProvider <- uniqueFilter

错误：未知提供者：uniqueFilterProvider <- uniqueFilter

sample JSON (wrapped into $scope.currentOptions)

示例 JSON（包装为$scope.currentOptions）

"cards ":[{"cardno":"123223333"},{"cardno":"123223333"},{"cardno":"123223333"}]}

回答by Dan

AngularJS does not have a built-in uniquefilter. You may be looking for the third-party add-on library called AngularUIthat does have such a filter.

AngularJS 没有内置unique过滤器。您可能正在寻找具有此类过滤器的名为AngularUI的第三方附加库。