Troubles with Angular's ng-if when dealing with multiple conditions

I have encountered a problem with an ng-if statement in my HTML code and I can't seem to figure out why it's not working.

The code snippet looks like this:

<div class="new-asset" data-ng-if="$root.questionData.question_type_id != '1' || $root.questionData.question_type_id != '8'">

Despite trying different variations of the condition, such as:

<div class="new-asset" data-ng-if="($root.questionData.question_type_id != '1' || $root.questionData.question_type_id != '8')">

None of them seem to work. I even attempted moving the condition logic to the controller, but faced issues due to asynchronous loading and dependencies.

While troubleshooting, I noticed that when I remove one of the conditions from the OR statement and keep only one, the code works fine:

<div class="new-asset" data-ng-if="$root.questionData.question_type_id != '1' || $root.questionData.question_type_id != '8'">

Any guidance or assistance on resolving this issue would be greatly appreciated. Thank you.

javascriptangularjsangularjs-directiveangular-ng-if

Answer №1

Instead of focusing on Angular, I'm delving into the fundamental logic behind this condition. If the ID equals 1, wouldn't it already meet the second requirement of not being equal to 8? And similarly, if the ID is 8, doesn't it fulfill both conditions?

In essence, shouldn't we be using && (logical AND) instead of || (logical OR)?

This insight would be better suited as a comment, but my reputation isn't high enough for that yet.

Answer №2

Consider implementing a JavaScript function:

$scope.checkQuestionType = function() {
  return $root.questionData.question_type_id != '1' || $root.questionData.question_type_id != '8';
};

Answer №3

Why not give it a shot with $rootScope in place of $root, and make sure to include $rootScope as a dependency in your controller? It's possible that the variable is just out of scope. Another approach could be assigning this to your $scope and then directly referencing it in your template.

The main idea here is to test whether the values are properly bound to your template. You could even consider attempting:

{{$root.questionData.question_type_id}}

in order to confirm this, and if it doesn't work, then focus on addressing the underlying issue at hand.

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