AngularJS checkbox filter -


i filter results.

there list of wines, wish when no checkbox checked, entire list of wine displayed.

  • when 1 checkbox checked displayed related category
  • when more 1 checkbox checked related categories displayed

i'm newbie angularjs, tried ng-model wihout success, here code without ng-model associated function:

<html ng-app="exampleapp"> <head>     <title></title>     <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.0-beta.10/angular.min.js"></script>      <script>         angular.module("exampleapp", [])                 .controller("defaultctrl", function ($scope) {                     $scope.wines = [                         { name: "wine a", category: "red" },                         { name: "wine b", category: "red" },                         { name: "wine c", category: "white" },                         { name: "wine d", category: "red" },                         { name: "wine e", category: "red" },                         { name: "wine f", category: "white" },                         { name: "wine g", category: "champagne"},                         { name: "wine h", category: "champagne" }                      ];                       $scope.selectitems = function (item) {                         return item.category == "red";                     };                      $scope.selectitems = function (item) {                         return item.category == "white";                     };                      $scope.selectitems = function (item) {                         return item.category == "champagne";                     };                 });     </script> </head> <body ng-controller="defaultctrl">  <h4>red: <input type="checkbox"></h4> <h4>white: <input type="checkbox"></h4> <h4>champagne: <input type="checkbox"></h4>                <div ng-repeat="w in wines | filter:selectitems">                 {{w.name}}                 {{w.category}}             </div>   </body> </html>

how use ng-model or ng-change associate function each checkbox button have real time filtering model??

there several implementations possible. here's one:

  1. have $scope.filter = {} object hold state of each filter. e.g. {red: true, white: false...}.

  2. associate each checkbox corresponding property using ng-model. e.g.: input type="checkbox" ng-model="filter['red']" />.

  3. have function (e.g. $scope.filterbycategory(wine)) decides if wine should displayed or not (based on $scope.filter object).

  4. use function filter items based on category. e.g. <div ng-repeat="wine in wines | filter:filterbycategory">

the filterbycategory function implemented this:

function filterbycategory(wine) {   // display wine if   var displaywine =       // wine's category checkbox checked (`filter[category]` true)       $scope.filter[wine.category] ||   // or         // no checkbox checked (all `filter[...]` false)       nofilter($scope.filter);    return displaywine; };

where nofilter() function checks if there filter activated (and returns true if there none):

function nofilter(filterobj) {   return object.     keys(filterobj).     every(function (key) { return !filterobj[key]; }); }

see, also, short demo.

update:

i created modified version, supports multiple filters (not filtering category).
basically, dynamically detects available properties (based on first wine element), adds controls (groups of check-boxes) applying filters based on each property , features custom filter function that:

  1. filters each wine item, based on every property.
  2. if property has no filter applied (i.e. no check-box checked), ignored.
  3. if property has check-boxes checked, used filtering out wine items (see above).
  4. there code applying multiple filters using , (i.e. properties must match) or or (at least 1 property must match).

see, also, updated demo.


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