re enabling ng-disabled button in Angular JS

Question

I am a newbie to AngularJS. I have created a form with fields which is disabled using ng-disabled by default. when I click on the edit <button> I want these fields to re-enable.

HTML

  <form class="form-horizontal" role="form" ng-submit="edit_setting()" ng-controller="ExchangeController">
    <div class="form-group">
      <label>Name</label>
      <div class="col-sm-6">
        <input type="text" class="form-control" ng-model="exchange_dt.name" ng-disabled="true">
      </div>
    </div>
    <div class="form-group">
      <label>Host Name</label>
      <div class="col-sm-6">
        <input type="text" class="form-control" ng-model="exchange_dt.host_name" required ng-disabled="true">
      </div>
    </div>
    <div class="form-group">
      <label>Address</label>
      <div class="col-sm-6">
        <input type="text" class="form-control" ng-model="exchange_dt.address" ng-disabled="true">
      </div>
    </div>
  </form>

Controller

  function ExchangeController($scope, $http, $cookieStore, $location) {
    var edit_exchange_setting = "https://pvbp.com/api/settings.html?contactid=292351&exchange_id=7124&clearinghouseid=1&token=e5349652507c0esae86d50fdbdc53222cf97&page=view";
      $http.get(edit_exchange_setting).success(function(response){
        $scope.exchange_dt.exchange_name = response.name;
        $scope.exchange_dt.exchange_host_name = response.host_name;
        $scope.exchange_dt.exchange_last_processed_date = response.address;   
      });

      $scope.edit_exchange_setting_click = (function(){
      // how can i make the fields re enable here

      });
  }

Answer 1

in controller create scope variable,

$scope.disabled= true;

and replace all ng-disabled with that variable like,

...ng-model="exchange_dt.name" ng-disabled="disabled"....

when you click on edit button set $scope.disabled to false like,

$scope.edit_exchange_setting_click = (function(){      
    $scope.disabled = false;
});