[英]How to take var from inside of ng-repeat and pass it to the controller, than pass it back to ng-repeat
[英]How to pass ng-repeat value to controller
我正在使用带有过滤器的ng-repeat指令,如下所示:
<div ng-repeat="person in data">
</div
即显示{{data.length}}
个人。 (我希望将长度值传递给控制器)
但是我需要将过滤后的长度值传递给控制器,因为我基于过滤后的长度值执行相同的逻辑。
1.方法1
ng-repeat="item in filtered = (data | filter:filterExpr)"
将创建过滤列表。
filtered.length
将显示过滤后的长度。
2,方法二
使用$watch
检测过滤的长度。
$scope.length = $scope.data.length;
$scope.$watch("search", function(query) {
$scope.length = $filter("filter")($scope.data, query).length;
});
例
var app = angular.module('angularjs-starter', []) app.controller('MainCtrl', function($scope, $filter) { $scope.data = [{ "name": "Martin", "age": 21 }, { "name": "Peter", "age": 26 }, { "name": "Arun", "age": 25 }, { "name": "Maxwell", "age": 22 }]; $scope.counted = $scope.data.length; $scope.$watch("search", function(query) { $scope.filteredData = $filter("filter")($scope.data, query); }); });
<html ng-app="angularjs-starter"> <head lang="en"> <meta charset="utf-8"> <title>Demo</title> <script src="//ajax.googleapis.com/ajax/libs/angularjs/1.0.3/angular.min.js"></script> <link rel="stylesheet" href="style.css"> <script> document.write('<base href="' + document.location + '" />'); </script> <script src="app.js"></script> </head> <body ng-controller="MainCtrl"> <input ng-model="search" type="text"> <br>Showing {{data.length}} Persons; <br>Filtered {{filteredData.length}} <ul> <li ng-repeat="person in filteredData"> {{person.name}} </li> </ul> </body> <script> </script> </html>
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