Search code examples
angularjsangularjs-ng-repeatconditional-statementsangular-filters

How to conditionally apply Angular filters on ng-repeat of object attributes?

I have an object with 100+ attributes, such as "name", "price", "expiry date"...etc I am using ng-repeat to iterate through all the key-pair values of the object and displaying them on a table.

<table class="table">
    <tr ng-repeat="x in attr_array">
        <td><b>{{x.key}}</b></td>
        <td>{{x.value}}</td>
    </tr>
</table>

But I want to use the Angular date-filter on certain attributes, such as any date fields:

{{ x.value | date: 'MMM d, y'}}

And ideally other filters too. How can I go about doing this?

Solution

  • I tried to recreate your problem and solved it with ng-if. There seems to be a function in the angular namespace to check every type like date, string, number, which I injected into the view through the scope.
    Also notice I used the ng-repeat="(key, value) in ..." assuming that you are iterating over an object, source.

    <!DOCTYPE html>
<html>

<head>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.0/angular.min.js"></script>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>

<body ng-app="app" ng-controller="RootController">
  <table>
    <tr ng-repeat="(key, value) in attr_array">
      <td><b>{{key}}</b>
      </td>
      <td>
        <span ng-if="isDate(value)">{{value | date: 'MMM d, y'}}</span>
        <span ng-if="isNumber(value)">{{value | number: 4}}</span>
        <span ng-if="isString(value)">{{value | uppercase}}</span>
      </td>
    </tr>
  </table>
  <script>
    angular.module('app', [])
      .controller('RootController', function($scope) {
        $scope.isDate = angular.isDate;
        $scope.isNumber = angular.isNumber;
        $scope.isString = angular.isString;
        $scope.attr_array = {
          date: new Date(),
          str: "hello",
          nm: 50.2
        };
      });
  </script>
</body>

</html>