"Troubleshooting: Issue with AngularJS ng-repeat not functioning properly when using an

Question

"Troubleshooting: Issue with AngularJS ng-repeat not functioning properly when using an

I am working with a simple list

<ul>
    <li ng-repeat="spiel in spielListe">Do something</li>
</ul>

Along with a perfectly connected controller

$scope.spielListe = [];

There is also a method that adds objects to the array in this format:

var spielObjekt = {team1: "Teamname 1", team2: "Teamname 2", court: ""};
$scope.spielListe.push(spielObjekt);

As a result, the array appears like this:

https://i.sstatic.net/tUTFu.png

The specific content of the objects is not essential. The goal is for Angular to run the ng-repeat twice and display my text twice - however, the HTML page remains blank.

What mistake might I be making? Where could an error occur?

Update

It seems there is an issue with the .push function. I added one object with the same structure to my array, which displays correctly in the ng-repeat. However, the two objects pushed in later are not being shown. Is this a problem?

Update 2

Thank you for your assistance - it turns out the mistake was having multiple elements in the DOM with ng-controller="contentCtrl" declared within them. This caused the controller to be called multiple times and resulted in the objects not displaying as expected.

javascript angularjs arrays angularjs-ng-repeat

Answer 1

Answer №1

There seems to be some ambiguity in the provided data. Based on your query, it appears you are interested in one of the following scenarios:

Scenario 1

If you expect your object to look like

{team1: "Teamname 1", team2: "Teamname 2", court: ""}

, then this will only display once in the output as it is a single object.

Here is an example for the above situation:

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>

<body>

    <div ng-app="myApp" ng-controller="MyCtrl">
        <ul>
            <li ng-repeat="spiel in spielListe">{{spiel.team1}}</li>
        </ul>
        <button ng-click="addItems()">Add</button>
    </div>

    <script>
        var app = angular.module('myApp', []);
        app.controller('MyCtrl', function ($scope, $http) {
            $scope.spielListe = [];
            $scope.addItems = function () {

                var spielObjekt = {
                    team1: "Teamname 1",
                    team2: "Teamname 2",
                    court: ""
                };
                $scope.spielListe.push(spielObjekt);
            }
        });
    </script>

</body>

</html>

Scenario 2

However, if you wish to have this displayed three times in your output, you will need to adjust the JSON structure as follows:

["Teamname 1", "Teamname 2", ""]

and use ng-repeat as shown below:

<li ng-repeat="spiel in spielListe">{{spiel}}</li>

or modify the JSON structure like this:

[{TeamName: "Teamname 1"}, {TeamName: "Teamname 2"}, {TeamName: ""}]

and use ng-repeat as:

<li ng-repeat="spiel in spielListe">{{spiel.TeamName}}</li>

This is because looping can only be done through an array of objects and not a single object. Here is an example showcasing this implementation.

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>

<body>

    <div ng-app="myApp" ng-controller="MyCtrl">
        <ul>
            <li ng-repeat="spiel in spielListe">{{spiel}}</li>
        </ul>
        <button ng-click="addItems()">Add</button>
    </div>

    <script>
        var app = angular.module('myApp', []);
        app.controller('MyCtrl', function ($scope, $http) {
            $scope.spielListe = [];
            $scope.addItems = function () {

                var spielObjekt = [
                    "Teamname 1", "Teamname 2", ""
                ];
                $scope.spielListe = $scope.spielListe.concat(spielObjekt);
            }
        });
    </script>

</body>

</html>

Answer 2

There seems to be some ambiguity in the provided data. Based on your query, it appears you are interested in one of the following scenarios:

Scenario 1

If you expect your object to look like

{team1: "Teamname 1", team2: "Teamname 2", court: ""}

, then this will only display once in the output as it is a single object.

Here is an example for the above situation:

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>

<body>

    <div ng-app="myApp" ng-controller="MyCtrl">
        <ul>
            <li ng-repeat="spiel in spielListe">{{spiel.team1}}</li>
        </ul>
        <button ng-click="addItems()">Add</button>
    </div>

    <script>
        var app = angular.module('myApp', []);
        app.controller('MyCtrl', function ($scope, $http) {
            $scope.spielListe = [];
            $scope.addItems = function () {

                var spielObjekt = {
                    team1: "Teamname 1",
                    team2: "Teamname 2",
                    court: ""
                };
                $scope.spielListe.push(spielObjekt);
            }
        });
    </script>

</body>

</html>

Scenario 2

However, if you wish to have this displayed three times in your output, you will need to adjust the JSON structure as follows:

["Teamname 1", "Teamname 2", ""]

and use ng-repeat as shown below:

<li ng-repeat="spiel in spielListe">{{spiel}}</li>

or modify the JSON structure like this:

[{TeamName: "Teamname 1"}, {TeamName: "Teamname 2"}, {TeamName: ""}]

and use ng-repeat as:

<li ng-repeat="spiel in spielListe">{{spiel.TeamName}}</li>

This is because looping can only be done through an array of objects and not a single object. Here is an example showcasing this implementation.

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>

<body>

    <div ng-app="myApp" ng-controller="MyCtrl">
        <ul>
            <li ng-repeat="spiel in spielListe">{{spiel}}</li>
        </ul>
        <button ng-click="addItems()">Add</button>
    </div>

    <script>
        var app = angular.module('myApp', []);
        app.controller('MyCtrl', function ($scope, $http) {
            $scope.spielListe = [];
            $scope.addItems = function () {

                var spielObjekt = [
                    "Teamname 1", "Teamname 2", ""
                ];
                $scope.spielListe = $scope.spielListe.concat(spielObjekt);
            }
        });
    </script>

</body>

</html>

Answer 3

Answer №2

Your spielObjekt variable represents just one object, so when you push that object into an array, your <li> element will only appear once. Therefore, your spielObjekt variable should look like this:

var spielObjekt = [{team1: "Teamname 1"},{team2: "Teamname 2"},{court: ""}];

Instead of using the push method, simply assign the spielObjekt variable to $scope.spielListe. This way, your <li> will be printed three times.

$scope.spielListe = [];
var spielObjekt = [{team1: "Teamname 1"},{team2: "Teamname 2"},{court: ""}];
$scope.spielListe = spielObjekt;

Answer 4

Your spielObjekt variable represents just one object, so when you push that object into an array, your <li> element will only appear once. Therefore, your spielObjekt variable should look like this:

var spielObjekt = [{team1: "Teamname 1"},{team2: "Teamname 2"},{court: ""}];

Instead of using the push method, simply assign the spielObjekt variable to $scope.spielListe. This way, your <li> will be printed three times.

$scope.spielListe = [];
var spielObjekt = [{team1: "Teamname 1"},{team2: "Teamname 2"},{court: ""}];
$scope.spielListe = spielObjekt;

Answer 5

Answer №3

Scenario 1 : Only one object is passed in $scope.spielListe, causing ng-repeat to iterate only once.

Scenario 2 : If spielObjekt contains an array of objects, each object must be iterated and added to the $scope.spielListe array.

Live Example :

var myApp = angular.module('myApp',[]);

myApp.controller('MyCtrl',function($scope) {
  $scope.spielListe = [];
  var spielObjekt = [
             {team1: "Teamname 1", team2: "Teamname 2", court: ""},
             {team3: "Teamname 3", team4: "Teamname 4", court: ""}
             ];
  
  for (var i in spielObjekt) {
    $scope.spielListe.push(spielObjekt[i]);
  }

  console.log($scope.spielListe);
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp" ng-controller="MyCtrl">
  <ul>
    <li ng-repeat="spiel in spielListe">Do something</li>
  </ul>
</div>

In the provided code snippet, $scope.spielListe consists of an array with 2 objects, functioning correctly.

Answer 6

Scenario 1 : Only one object is passed in $scope.spielListe, causing ng-repeat to iterate only once.

Scenario 2 : If spielObjekt contains an array of objects, each object must be iterated and added to the $scope.spielListe array.

Live Example :

var myApp = angular.module('myApp',[]);

myApp.controller('MyCtrl',function($scope) {
  $scope.spielListe = [];
  var spielObjekt = [
             {team1: "Teamname 1", team2: "Teamname 2", court: ""},
             {team3: "Teamname 3", team4: "Teamname 4", court: ""}
             ];
  
  for (var i in spielObjekt) {
    $scope.spielListe.push(spielObjekt[i]);
  }

  console.log($scope.spielListe);
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp" ng-controller="MyCtrl">
  <ul>
    <li ng-repeat="spiel in spielListe">Do something</li>
  </ul>
</div>

In the provided code snippet, $scope.spielListe consists of an array with 2 objects, functioning correctly.

"Troubleshooting: Issue with AngularJS ng-repeat not functioning properly when using an

Answer №1

Answer №2

Answer №3

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