AngularJS encountering issues when trying to set scope variable within link function

Welcome! I have some code here that I'm working on. The goal is to allow users to create multiple divs whose properties are bound to the controller's model.

appModule.controller('textController', function($scope){
    var box = {x: '0', y: '0', height: '100px', width: '200px', text: 'this is the default text'};

    $scope.textBoxes = [box];

    $scope.addNewTextBox = function(){
        console.log("creating new textbox!!!");
        $scope.textBoxes.push(box);
    };
});

appModule.directive('tbox', function($document){
    return {
        restrict: "E",
        template: '<div><div ng-transclude></div>',
        transclude: true, 
        scope: {
            model: "=",
        },
        link: function postLink(scope, element, attrs, ctrl){ //the scope here is the object's scope
            var length = scope.$parent.textBoxes.length;
            console.log(length);
            scope.model = scope.$parent.textBoxes[length-1];
        }
    }

});

I've encountered an issue where I can't assign the model variable in the scope to the textBoxes variable in the controller. This results in the following error:

Error: Non-assignable model expression: undefined (directive: tbox)
    at Error (<anonymous>)
    at h (https://ajax.googleapis.com/ajax/libs/angularjs/1.0.8/angular.min.js:43:213)
    at Object.<anonymous> (https://ajax.googleapis.com/ajax/libs/angularjs/1.0.8/angular.min.js:43:326)
    at Object.e.$digest (https://ajax.googleapis.com/ajax/libs/angularjs/1.0.8/angular.min.js:87:13)
    at Object.e.$apply (https://ajax.googleapis.com/ajax/libs/angularjs/1.0.8/angular.min.js:89:198)
    at https://ajax.googleapis.com/ajax/libs/angularjs/1.0.8/angular.min.js:16:239
    at Object.d [as invoke] (https://ajax.googleapis.com/ajax/libs/angularjs/1.0.8/angular.min.

Any thoughts on what might be causing this?

Answer №1

One possible solution for the error indicating that 'model' is not defined is to delete model: "=" from the directive's isolated scope.

The modified code should be:

scope: {},

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