[Fixes #13328] Handling the case where the group is None

[Gpetrak]

This PR was created according to this issue: #13328

Checklist

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[gemini-code-assist]

Summary of Changes

Hello @Gpetrak, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses issue #13328 by implementing a fix in the API serializer to properly handle the scenario where the 'group' field is set to None. This allows users to clear the group association for an instance. The code has been modified to check for a None value for the group and handle it accordingly by setting the instance's group to None and removing the group from the validated data.

Highlights

• Fix: Handles the case where the 'group' field is set to None in the API serializer.
• Clear Group: Allows clearing the group association by setting the 'group' field to null.
• Validation: Ensures that the group is removed from validated data after clearing to prevent further processing.

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[gemini-code-assist]

Code Review

This pull request fixes an issue where setting a resource's group to None would cause an error. The change correctly handles this case by adding a specific logic block and improves the code by avoiding a double save.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 73.01%. Comparing base (9eb27c5) to head (89d5eba).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #13344      +/-   ##
==========================================
- Coverage   73.02%   73.01%   -0.01%     
==========================================
  Files         917      917              
  Lines       52453    52457       +4     
  Branches     6005     6006       +1     
==========================================
  Hits        38302    38302              
- Misses      12597    12601       +4     
  Partials     1554     1554              

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