What causes the $scope to empty out within this particular function?

Can anyone explain why the variable panodataName is becoming empty when used inside the function $scope.addPanodata?

HTML:

<input type="text" class="form-control" ng-model="panodataName" style="width:auto;padding:0;">
<a class="btn btn-primary" href="javascript:;" ng-click="addPanodata(pano.objectId)">Add</a>

JS:

angular.module('yoApp')
  .controller('addPanoCtrl', function($q, $scope, $rootScope, $routeParams, serviceUpload) {
    $scope.panodataName = ''

    $scope.addPanodata = function(panoId) {
      var Panodata = AV.Object.extend('PanoramaData'),
      panodata = new Panodata(),
      panoJSON = _.where($scope.building.pano, {'objectId': panoId})

      $scope.pano = panoJSON[0]
      console.log($scope.panodataName)
      console.log($scope.panodataName)

      panodata.save(json, {
      success: function(object) {

      },
      error: function(object, error) {

      }
      })
    }

I've noticed that if I use {{panodataName}} within curly braces, it shows the correct value of the input.

panodataName displays the correct value of the input.

EDIT:

Could it be related to the fact that it's being used inside an ng-repeat block?

<div class="col-md-6" ng-repeat="panodata in pano.panoData">

Answer №1

It seems like the issue may lie in having logic within an ng-repeat block.

When using ng-repeat, Angular creates a new scope for each iteration of the loop. This means that any data bound with ng-model="panodataName" will be specific to that particular iteration's local scope, not the global controller's scope.

If you want to bind to the parent scope of the ng-repeat, where you have defined the panodataName property, you can use ng-model="$parent.panodataName".

Keep in mind that by binding multiple inputs to the same variable, updating one will affect all others within the ng-repeat.

You can see a working demo on this fiddle.


Further evidence can be found in the Angular documentation regarding ng-repeat creating new scopes here. Additionally, discussions on why it's recommended to avoid using $parent can be found here.

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