Angular failing to reflect changes in my select element according to the model

One issue I'm facing in my application is with grouped select elements that share the same options. Whenever one select element changes, it checks the others to see if the new option selected has already been chosen in any of the other selects. In such cases, there is a dynamic logic in place to choose an option that hasn't yet been selected in the other selects. Unfortunately, this sometimes results in the same option being selected again, causing the select element to fall out of sync with the model.

To demonstrate this problem, I've created a simple jsFiddle which can be accessed here: http://jsfiddle.net/wvLHw/

I have included a potential workaround in the code, but I'm unsure how feasible it would be to implement in my actual application. Is there a more effective solution to address this issue and ensure proper functionality? Why is Angular not updating the select element based on my model as expected?

javascriptangularjs

Answer №1

After encountering an AngularJS issue in version 1.0.2, it was discovered and resolved in the update to 1.0.3.

You should now find that everything is working as expected.

$scope.myOnChange = function() {
    //additional logic here, ultimately returning to point c
    $scope.foo = "c";
}

Answer №2

It seems like you're looking for a solution where you need to perform some logic based on the values of multiple select elements in AngularJS. If I understand correctly, when one select value changes, you want to execute certain logic that will calculate a final value to be set.

If this assumption is correct, using $scope.$watch would be the way to go. For instance, if you have two select elements bound to different model values (let's say foo and bar), and you want to force foo to a specific value when it matches the selected value of bar, you can achieve this with the following code:

$scope.$watch('foo', function(fooValue){
    if (fooValue === $scope.bar){
        $scope.foo = 'a';
    }
});

You can view a working example in this jsFiddle: http://jsfiddle.net/pkozlowski_opensource/vqjKq/3/

I hope this addresses your issue. If not, feel free to leave a comment and I'll be happy to assist further.

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