Troubleshooting: Issues with accessing object properties in a function in AngularJS

In my controller, I have a function that checks the day and changes the isOpen property of an object based on the time. The object is retrieved using the code snippet below:

$http.get('js/data.json').success(function(data) {
  $scope.locations = data;
});

Here's the code snippet:

$scope.checkStatus = function($scope) {
 switch(day) {
        case 0: $scope.locations[0].isOpen = false;
                break;
        case 1: 
        case 2: 
        case 3: 
        case 4: 
        case 5: if( time >= $730am && time < $9pm ) {
                    $scope.locations[0].isOpen = true;
                } else {
                    $scope.locations[0].isOpen = false;
                };
                break;
        case 6: if( time >= $11am && time < $9pm ) {
                    $scope.locations[0].isOpen = true;
                } else {
                    $scope.locations[0].isOpen = false;
                };
                break;
        default: alert("default");
};

// More switch statements for other locations...

$scope.checkStatus();

But I encountered an error "Cannot read property 'locations' of undefined." However, when I tested $scope.locations[0].isOpen within the $http.get success function, it worked correctly.

So my questions are: How can I access the object inside the checkStatus function? And is there a better way to achieve this functionality?

Edit:

I managed to resolve the issue by removing the checkStatus() function and directly placing the switch statements inside the $http.get success function. Although it works, I'm not sure if it's the best practice.

myApp.controller('MyController', function MyController($scope, $window, $http) {
  $http.get('js/data.json').success(function(data) {
    $scope.locations = data;

    // variables omitted to save space

   switch(day) {
        case 0: $scope.locations[0].isOpen = false;
                break;
        case 1: 
        case 2: 
        case 3: 
        case 4: 
        case 5: if( time >= $730am && time < $9pm ) {
                    $scope.locations[0].isOpen = true;
                } else {
                    $scope.locations[0].isOpen = false;
                };
                break;
        case 6: if( time >= $11am && time < $9pm ) {
                    $scope.locations[0].isOpen = true;
                } else {
                    $scope.locations[0].isOpen = false;
                };
                break;
        default: alert("default");
    }
 });

Answer №1

It seems like you can simplify your code by removing the second use of $scope:

$scope.checkStatus = function($scope) {

Try just using:

$scope.checkStatus = function() {

The key point to remember is that the correct $scope is already available within the scope of this function.

Answer №2

Take a close look at the information retrieved from your http request. The error message indicates that it is unable to locate the object isOpen within $scope.location. To troubleshoot, make use of console.log($scope.locations) to inspect your nested array and make necessary adjustments in your code. Since I am unable to access your json file, my ability to assist you is limited. However, consider replacing instances of

$scope.locations[0..1..2].isOpen = false;
with:

$scope.locations.isOpen = false;

If the issue persists, kindly share the data you have logged in the console or from the json file for further assistance.

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