如何在控制器中链接AngularJS过滤器

时间:2015-01-09 01:21:08

标签: angularjs angular-filters

我在视图中有几个过滤器

  <tr ng-repeat="x in list | filter:search| offset:currentPage*pageSize| limitTo:pageSize ">

在我的项目中取得好成绩,我必须在控制器中进行此过滤而不是在视图中

我知道基本语法$filter('filter')('x','x'),但我不知道如何在控制器中创建过滤器链,因此一切都可以像我的模板中的示例一样工作。

我找到了一些解决方案,现在只使用一个过滤器,但应该可以使用很多;)

       $scope.data = data; //my geojson from factory//

       $scope.geojson = {}; //i have to make empty object to extend it scope later with data, it is solution i found for leaflet //

       $scope.geojson.data = [];

       $scope.FilteredGeojson = function() {

       var result = $scope.data;

       if ($scope.data) {
          result = $filter('limitTo')(result,10);
          $scope.geojson.data = result;
          console.log('success');
       }
           return result;

       };

我在ng-repeat工作中使用此功能很好,但我必须用几个滤镜检查它。

3 个答案:

答案 0 :(得分:25)

您可以重新过滤从第一个过滤器返回的内容。等等。

var filtered;
filtered = $filter('filter')($scope.list, {name: $scope.filterParams.nameSearch});
filtered = $filter('orderBy')(filtered, $scope.filterParams.order);

plunkr下面演示了上述内容。

http://plnkr.co/edit/Ej1O36aOrHoNdTMxH2vH?p=preview

答案 1 :(得分:10)

除了明确地将过滤器应用于前一个过滤器的结果之外,您还可以构建一个将多个过滤器链接在一起的对象。

控制器

angular.module('Demo', []);

angular.module('Demo')
    .controller('DemoCtrl', function($scope, $filter) {

        $scope.order = 'calories';
        $scope.filteredFruits = $scope.fruits = [{ name: 'Apple', calories: 80 }, { name: 'Grapes', calories: 100 }, { name: 'Lemon', calories: 25 }, { name: 'Lime', calories: 20 }, { name: 'Peach', calories: 85 }, { name: 'Orange',    calories: 75 }, { name: 'Strawberry', calories: 65 }];

        $scope.filterFruits = function(){
            var chain = new filterChain($scope.fruits);
            $scope.filteredFruits = chain
                .applyFilter('filter', [{ name: $scope.filter }])
                .applyFilter('orderBy', [ $scope.order ])
                .value;
        };

        function filterChain(value) {
            this.value = value;
        }

        filterChain.prototype.applyFilter = function(filterName, args) {
            args.unshift(this.value);
            this.value = $filter(filterName).apply(undefined, args)
            return this;
        };
    });

视图

<!doctype html>
<html ng-app="Demo">
  <head>
    <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.16/angular.js"></script>
    <script src="script.js"></script>
    <link href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet">
  </head>
  <body>

<div ng-controller="DemoCtrl">
  <input type="text" ng-model="filter" ng-change="filterFruits()" placeholder="Filter Fruits" />
  <select ng-model="order">
    <option value="name">name</option>
    <option value="calories">calories</option>
  </select>
  <div ng-repeat="fruit in filteredFruits">
    <strong>Name:</strong> {{fruit.name}}
    <strong>Calories:</strong> {{fruit.calories}}
  </div>
</div>
  </body>
</html>

答案 2 :(得分:4)

这是FP库(如lodash或Ramda)的典型案例。确保将公共数据作为最后一个arg应用于每个过滤器。 (在这种情况下是列)

$scope.columnDefs = _.compose(
    $filter('filter3'),
    $filter('filter2'),
    $filter('filter1')
)($scope.columns)

或使用额外的args

$scope.columnDefs = _.compose(
    $filter('filter3').bind(null, optionalArg1, optionalArg2),
    $filter('filter2').bind(null, optionalArg1),
    $filter('filter1')
)($scope.columns)