如何在AngularJs中使用ng-repeat过滤(键,值)？

Question

我想做的事情如下:

<div ng-controller="TestCtrl">
    <div ng-repeat="(k,v) in items | filter:hasSecurityId">
        {{k}} {{v.pos}}
    </div>
</div>

AngularJs部分:

function TestCtrl($scope) 
{
    $scope.items = {
                     'A2F0C7':{'secId':'12345', 'pos':'a20'},
                     'C8B3D1':{'pos':'b10'}
                   };

    $scope.hasSecurityId = function(k,v)
    {
       return v.hasOwnProperty('secId');
    }
}

但不知何故,它向我展示了所有项目.如何过滤(键,值)？

Answer 1

角度过滤器只能应用于数组而不是对象,来自angular的API -

"从数组中选择项目的子集,并将其作为新数组返回."

这里有两个选项:
1)移动$scope.items到数组或 -
2)预过滤ng-repeat项目,如下所示:

<div ng-repeat="(k,v) in filterSecId(items)">
    {{k}} {{v.pos}}
</div>

在控制器上:

$scope.filterSecId = function(items) {
    var result = {};
    angular.forEach(items, function(value, key) {
        if (!value.hasOwnProperty('secId')) {
            result[key] = value;
        }
    });
    return result;
}

jsfiddle:http://jsfiddle.net/bmleite/WA2BE/

Answer 2

我的解决方案是创建自定义过滤器并使用它:

app.filter('with', function() {
  return function(items, field) {
        var result = {};
        angular.forEach(items, function(value, key) {
            if (!value.hasOwnProperty(field)) {
                result[key] = value;
            }
        });
        return result;
    };
});

并在HTML中:

 <div ng-repeat="(k,v) in items | with:'secId'">
        {{k}} {{v.pos}}
 </div>

Answer 3

你也可以使用ng-repeat具有ng-if:

<div ng-repeat="(key, value) in order" ng-if="value > 0">

Answer 4

或者只是使用

ng-show="v.hasOwnProperty('secId')"

请在此处查看更新的解

http://jsfiddle.net/RFontana/WA2BE/93/

Answer 5

您可以简单地使用angular.filter模块,然后您甚至可以通过嵌套属性进行过滤.
看:jsbin
2例子:

JS:

angular.module('app', ['angular.filter'])
  .controller('MainCtrl', function($scope) {
  //your example data
  $scope.items = { 
    'A2F0C7':{ secId:'12345', pos:'a20' },
    'C8B3D1':{ pos:'b10' }
  };
  //more advantage example
  $scope.nestedItems = { 
    'A2F0C7':{
      details: { secId:'12345', pos:'a20' }
    },
    'C8B3D1':{
      details: { pos:'a20' }
    },
    'F5B3R1': { secId:'12345', pos:'a20' }
  };
});

HTML:

  <b>Example1:</b>
  <p ng-repeat="item in items | toArray: true | pick: 'secId'">
    {{ item.$key }}, {{ item }}
  </p>

  <b>Example2:</b>
  <p ng-repeat="item in nestedItems | toArray: true | pick: 'secId || details.secId' ">
    {{ item.$key }}, {{ item }}
  </p> 

Answer 6

这有点晚了,但我找了类似的过滤器,结束了这样的事情:

<div ng-controller="TestCtrl">
 <div ng-repeat="(k,v) in items | filter:{secId: '!!'}">
   {{k}} {{v.pos}}
 </div>
</div>