Javascript AngularJS：如何从对象数组中查找对象，给定数组中的属性值数组，使用 $filter
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AngularJS: how to find objects from an array of objects, given an array of property values in an array, using $filter
提问by mssuley
Have a set of objects in an array (items array) that have property
在具有属性的数组（项目数组）中有一组对象
item_id:
[{item_id:1,...},{item_id:2,...}...]
Have another array with a set of
有另一个数组与一组
item_ids:
[2, 8, 10]
How do I use the $filter of angularjs to get array of objects from items array where item_idmatches those in item_idsarray.
如何使用 angularjs 的 $filter 从 items 数组中获取item_id与数组中匹配的对象item_ids数组。
回答by jad-panda
You can use custom filter to do this kind of filtration. and you can use use $filterservice if you want to do that in code instead of template.
您可以使用自定义过滤器来进行这种过滤。$filter如果您想在代码而不是模板中执行此操作，则可以使用使用服务。
See the below code.
请参阅下面的代码。
var app = angular.module('app', []);
app.controller('ctrl', function($scope, $filter) {
$scope.items = [{
item_id: 1
}, {
item_id: 2
}, {
item_id: 3
}, {
item_id: 4
}];
$scope.findList = [2, 4];
$scope.findList2 = [3];
// Using $filter service.
$scope.usingservice = $filter('findobj')($scope.items, [1, 3])
});
app.filter('findobj', function() {
return function(list, obj) {
return list.filter(function(l) {
if (obj.indexOf(l.item_id) >= 0) {
return true;
}
});
};
})<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app">
<div ng-controller="ctrl">
<div ng-repeat="item in items | findobj: findList">
{{item}}
</div>
<hr/>
<div ng-repeat="item in items | findobj: findList2">
{{item}}
</div>
<hr/>{{usingservice}}
</div>
</div>