fix: incompatibility with djangocms-versioning-filer 1.3 was fixed

When used with djangocms-versioning-filer, the FileAdminChangeForm might not have a file field due to missing permissions. Since djangocms-versioning-filer 1.3 the constructor of FileAdminChangeForm crashes when opening the change URL of a published image.

This patch fixes this issue by adding a check whether the file field is present before overriding it.

Description

Checklist

[x] I have opened this pull request against master
[x] I have added or modified the tests when changing logic
[x] I have followed the conventional commits guidelines to add meaningful information into the changelog
[x] I have read the contribution guidelines and I have joined #workgroup-pr-review on Slack to find a “pr review buddy” who is going to review my pull request.

Summary by Sourcery

Fix compatibility issue with djangocms-versioning-filer 1.3 by ensuring the FileAdminChangeForm does not crash when the file field is missing due to permissions.

Bug Fixes:

Fix crash in FileAdminChangeForm constructor when used with djangocms-versioning-filer 1.3 by checking for the presence of the file field before overriding it.

Tests:

Modify tests to accommodate the logic change in FileAdminChangeForm.

Reviewer's Guide by Sourcery

This PR fixes a compatibility issue with djangocms-versioning-filer 1.3 by adding a conditional check before modifying the file field widget in the FileAdminChangeForm. The change prevents the form from crashing when the file field is not present due to missing permissions.

Class diagram for FileAdminChangeForm modification

classDiagram
    class FileAdminChangeForm {
        +__init__(*args, **kwargs)
        +clean()
    }
    note for FileAdminChangeForm "Added conditional check for 'file' field presence before setting widget"

File-Level Changes

Change	Details	Files
Added a defensive check before modifying the file field widget	Added a conditional check to verify if 'file' exists in form fields Only set the FileInput widget when the file field is present	`filer/admin/fileadmin.py`

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django-cms / django-filer