Arranging elements using the ng-repeat directive in AngularJS

My question pertains to an array I am working with:

$scope.answers=["","","",""]

This array contains several empty elements.

<li ng-repeat="item in answers "><input type="text" ng-model="item"/></li>

When running this code, an error indicating that duplicate values are not allowed in ng-repeat is thrown. To resolve this, I modified the code as follows:

<li ng-repeat="item in answers track by $index"><input type="text" ng-model="item"/></li>

Although this change fixed the issue, I am interested in finding a solution without using track by $index, ensuring that sorting functionality remains intact.

If anyone has any insights or suggestions on how to achieve this, please share your ideas.

javascriptangularjssortingangular-uiangular-ui-bootstrap

Answer №1

Found some inspiration from this helpful discussion

To make things work, add the code snippet below to your controller (since you can't access angular objects other than those in the scope)

$scope.identity = angular.identity;

After that, simply use the following code in your HTML and angular will no longer be a hassle:

<li ng-repeat="item in answers | orderBy : identity track by $index"><input type="text" ng-model="item"/></li>

Answer №2

Have you considered using objects within the array like this:

$scope.answers = [{}, {}, {}, {}, {}];

Then, in your design, access a property of the empty object.

<li ng-repeat="item in answers">
    <input type="text" ng-model="item.content"/>
</li>

You can observe this method in action on the following jsFiddle.

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