Problem with ng-repeat not updating select dropdown options

Struggling with AngularJS while working on a project, I encountered an issue with a 'select-options' element.

Currently, I am making a $http request to retrieve data from a Cloud SQL database.

To achieve this, I am invoking a function from my factory that fetches the data from the database.

This is the JavaScript code I am working with.

In the code snippet, you can see that I initialize the 'controller.connections' variable with an array containing 2 values (1 and 2).

After fetching the data using the 'f_getData' function, I modify the values in that array (adding 4 values, although I am not using the fetched data to just test, but the outcome remains the same).

Here is the HTML code snippet I am referring to.

For your reference, my ng-app directive is on the 'html' tag, and the ng-controller directive is on the 'body' tag. I am using ng-repeat for my options as I encountered the same issue using ng-options as well. Just below the select element, I have another ng-repeat with the same conditions to test.

This is the observed behavior I am trying to address.

It appears that the variable used in the ng-repeat for my select element is not getting updated. However, the same variable is updated in the ng-repeat on the 'p' tag.

Attempting various solutions such as :

  1. Using $scope.$apply() in the callback ('then'), which results in console messages stating that $digest is in progress. I also tried placing it after the callback, where it mentions that $apply() is executing, and even attempted a $timeout of 2 seconds, but it had no effect.
  2. Using $scope.connections instead of controller.connections, but this seemed to cause issues as ng-repeat generates its own scope.
  3. Introducing a temporary variable for the large array within the callback, then updating the value of my 'connections' variable to this temporary variable outside the callback, and finally calling $scope.$apply(). Despite this, the ng-repeat for my options does not reflect the update, whereas the ng-repeat on the 'p' tag does.

In essence, my challenge lies in my inability to utilize ng-repeat or ng-options effectively to create a dynamic select input. Seeking advice and solution from the community. Thank you in advance.

Answer №1

I want to express my gratitude to all of you who offered assistance in solving my issue. With a minor adjustment, I was able to resolve the problem. In a somewhat archaic manner, I resorted to manually populating a select dropdown with options by generating the option elements in my JavaScript while actively seeking a better solution. During my search for a way to reset the select value, I stumbled upon a plunker where someone successfully utilized ng-options. I decided to incorporate the code from this plunker into my own script. And to my surprise, it worked! Subsequently, I attempted to customize the code to fit my requirements, and it worked up to a certain extent. The obstacle arose at the div containing my select element. I experimented with relocating it to various positions, all of which were effective except for the original position (albeit with intermittent glitches: occasionally, upon a refresh, the options would fail to display, only to be resolved upon a subsequent refresh). I am currently in the process of identifying the root of this problem. Once again, thank you to everyone for your assistance. I apologize for providing screenshots of my code; I am unfamiliar with how to pose questions in this forum. I tend to rely on others' answers rather than solving problems myself, but rest assured, I am taking into account all the constructive feedback for my future inquiries. Thank you once more! P.S: How does one go about closing a thread here, if you don't mind me asking? ^^

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