[英]AngularJS Ng-Repeat - Multiple Custom Filters to Filter Items by JSON Object Properties
JSFiddle: http : //jsfiddle.net/ADukg/16368/ 。
我正在尝试通过多个过滤器过滤ng-repeat列表中的项目,如果该对象的JSON属性与所选选项匹配。
因此,当选择“未读”过滤器时,将仅在每个json对象的“未读”属性等于true的情况下显示项目,并且与高重要性过滤器类似。
我还希望能够将这两个过滤器组合在一起,以便当选择两个过滤器时,列表仅显示未读属性和高重要性属性都等于true的项目。
我在上面的JSFiddle中有一个基本设置,在这里我已将模型用于过滤器复选框,但一直在寻找一种方法来为列表实现这些过滤器,并且对于如何处理感到困惑我需要这种情况。
HTML:
<div>
<label for="filterByAllCheckbox">Filter by All </label>
<input ng-model="filters.all" ng-change="filterByAll()" type="checkbox" id="filterByAllCheckbox" ng-disabled="filters.all">
</div>
<div>
<label for="filterByUnreadCheckbox">Filter by Unread </label>
<input ng-model="filters.unread" ng-change="manageFilters()" type="checkbox" id="filterByUnreadCheckbox">
</div>
<div>
<label for="filterByHighImportanceCheckbox">Filter by High Importance </label>
<input ng-model="filters.highImportance" ng-change="manageFilters()" type="checkbox" id="filterByHighImportanceCheckbox">
</div>
<br>
<ul>
<b>NOTIFICATIONS</b>
<li ng-repeat="notification in notifications">
{{notification.title}}
</li>
</ul>
您可以使用ng-show in li
项检查两个条件(未读和highImportance)来实现这种功能。
<li ng-repeat="notification in notifications"
ng-show="(filters.all)
|| (filters.unread && !notification.read && filters.highImportance && notification.importance == 'High')
|| (!filters.unread && notification.read && filters.highImportance && notification.importance == 'High')
|| (filters.unread && !notification.read && !filters.highImportance && notification.importance != 'High')
|| (!filters.unread && notification.read && !filters.highImportance && notification.importance != 'High')">
{{notification.title}}
</li>
我怀疑这是否是实现您所描述的最佳方法。
更新。 实现自定义过滤器。
var myApp = angular.module('myApp',[]).filter('notificationFilter', function () {
return function (array, all, unread, highImportance) {
var matches = [];
for (var i = 0; i < array.length; i++) {
if (all
|| (!unread && highImportance && array[i].importance == 'High')
|| (unread && !array[i].read && !highImportance)
|| (unread && !array[i].read && highImportance && array[i].importance == 'High')) {
matches.push(array[i]);
}
return matches;
};
});
然后,您必须在控制器方法中调用filter。
$scope.manageFilters = function() {
if ($scope.filters.unread == true || $scope.filters.highImportance == true) {
$scope.filters.all = false;
} else {
$scope.filters.all = true;
}
$scope.shownNotifications = $filter('notificationFilter')($scope.notifications, $scope.filters.all, $scope.filters.unread, $scope.filters.highImportance);
}
和
$scope.filterByAll = function() {
if ($scope.filters.all == true) {
$scope.filters.unread = false;
$scope.filters.highImportance = false;
$scope.shownNotifications = $filter('notificationFilter')($scope.notifications, $scope.filters.all, $scope.filters.unread, $scope.filters.highImportance);
}
}
当然可以更改html:
<li ng-repeat="notification in shownNotifications">
{{notification.title}}
</li>
确保在控制器定义中声明$filter
并初始化清单shownNotifications
。 您可以在这里查看更新的jsfiddle。 随时进行优化-根据需要更改我的示例实现。
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