How to filter objects in array by category key in Angular ng-repeat

Question

I'm trying to use Angular filter to display only sorted tags by category

Example of a tag object in tags array :

{
    term: term,
    id: id,
    category: category
}

The ng-repeat tags:

<li ng-repeat="(k, m) in tags | filter: filterTags | orderBy:predicate:reverse"
    ng-class="{'selected': m.selected}"
    ng-click="selectTag(m)">    
    <div class="tag">{{m.term}}</div>
</li>

The sort by category radio buttons:

<div class="category-selection">
    <ul>
        <li>
            <input type="radio" ng-model="catSort" name="brand" value="brand">
            Brand
        </li>
        <li>
            <input type="radio" ng-model="catSort" name="client" value="client">
            Client
       </li>

In the sort radio button directive controller:

// Detect category sort
// Then apply the value to the filter function:

$scope.$watch('catSort', function(value) {
    console.log(value);
    tagsPanel = ScopeFactory.getScope('tagsPanel');
    tagsPanel.filterTags(value);
}); 

I found out that filter is has it's own Angular module, so my question is, how do I get the category strings into this filter?

.filter('filterTags', function() {
    return function(tags, category) {
        return tags;
    };
});

Here is where I capture the new category, how would I send the value into the filter above?

$scope.$watch('catSort', function(value) {
    console.log(value);
}); 

Answer 1

If I got it right. You want to filter your tag object array by category.

You can call a scope method and return true if it matches the currently selected category. The parameter for this method will be a tag object of your ng-repeat. So you can do a check like return tag.category == $scope.catSort;

Please have a look at the demo below and here at jsFiddle .

(I've took sport categories just to have some dummy data.)

 angular.module('myApp', []) .controller('mainCtrl', function ($scope) { $scope.catSort = "football"; $scope.tags = [{ term: 'foot1', id: 'id', category: 'football' }, { term: 'foot2', id: 'id2', category: 'football' }, { term: 'base1', id: 'id', category: 'baseball' }, { term: 'base2', id: 'id2', category: 'baseball' }, ]; $scope.filterTags = function (tag) { //console.log(tag, $scope.catSort); return tag.category == $scope.catSort; }; }); 

 ul { list-style-type: none; } 

 <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div ng-app="myApp" ng-controller="mainCtrl">Filter by category: <div class="category-selection"> <ul> <li> <input type="radio" ng-model="catSort" name="football" value="football" />Football</li> <li> <input type="radio" ng-model="catSort" name="baseball" value="baseball" />Baseball</li> </ul> </div>Teams: <ul> <li ng-repeat="(index, tag) in tags | filter: filterTags" ng-class="{'selected': tag.selected}" ng-click="selectTag(tag)"> <div class="tag">{{tag.term}}</div> </li> </ul> </div>