Update method reference in get_actions

[KommuSoft]

The method reference in get_actions within import_export/admin.py was updated from using ExportActionMixin.export_admin_action to type(self).export_admin_action. This change ensures that the function call always refers to the current instance's class method. This is particularly important in situations where the class has been inherited and the method overridden. Fixing #1680.

Problem

Subclassing .export_admin_action did not work: the old method was still triggered.

Solution

Allow subclassing .export_admin_action by using type(self) instead of ExportActionMixin.

[matthewhegarty]

Hi Willem, thanks for submitting. Is it possible you could provide a test case which proves the issue is fixed? Also feel free to add an entry to CHANGELOG.rst.

[coveralls]

coverage: 100.0%. remained the same
when pulling 1f5712a on hapytex:issues/issue-1680
into 6319211 on django-import-export:main.

[KommuSoft]

Hi Willem, thanks for submitting. Is it possible you could provide a test case which proves the issue is fixed? Also feel free to add an entry to CHANGELOG.rst.

Yes. I've added a test, if the change in the import_export/admin.py is reverted, the test fails, since then it will not trigger the subclassed method.

With the change, the test succeeds.

[matthewhegarty]

Looks good, thanks for taking the time to submit this patch.