Potential Scope Problem in Angular JS Controller

The HTML code snippet I have is as follows:

<body ng-controller = "Control as control">
<button ng-click = "control.prepareAction()">Do Action </button>
<div id="one" ng-hide = "!control.showOne" >
    <div>
      <h6> {{control.name}}</h6>
      <p> Bills Sponsored: {{control.count}} <p>
  </div>

</body>

In the Javascript part of my code:

var vm = this;
vm.name = "My Name"
vm.prepareAction = function(){
  action(parseFirst(), parseLast()); //The two parse functions extract values from an HTML form. This part is functioning correctly.
}
function action(first, last) {

      $.post('php/one.php', {
          first: first,
          last: last
        },
        function(data) {
          create(JSON.parse(data));
        });
      return values;
      }

    function create(data) {
      var countArray = data[0];
      vm.count = countArray[0];
      vm.showOne = true;
    }

The issue I am facing is that the function does not update the values of showOne (the div remains hidden) or count (it displays as blank when ng-hide is set to false) in the HTML. Despite checking the value of `vm` on the console and using the Chrome ng-inspector Extension, it seems that the values for showOne and count are correct. This leads me to believe that there might be a scope-related problem causing this inconsistency.

Answer №1

It seems that using $.post outside of the context of AngularJS is causing issues with the digest cycle in the create method. To resolve this, there are two options available:

Option 1: Instead of using $.post, try using $http to make the POST request:

$http({
  method: 'POST',
  url: 'php/one.php'
}).then(function successCallback(response) {
   create(JSON.parse(response));
}, function errorCallback(response) {
});

Option 2: Modify the create function as follows:

function create(data) {
  var countArray = data[0];
  vm.count = countArray[0];
  vm.showOne = true;
  $scope.$apply();
}

Regardless of the option chosen, ensure that $http and $scope are properly injected into the controller.

Answer №2

Consider integrating your update function with the vm object.

vm.updateFunction = updateFunction;

Failing to do so will restrict its accessibility outside of the closure, such as in your HTML code.

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