Pull Request for Issue #45570

Summary of Changes

This PR fixes an issue where Joomla allows the creation of multiple banners with the same alias within the same category, despite the code intending to enforce alias uniqueness.

Previously, the alias uniqueness check existed only within the update functionality of the store function in the BannerTable class, meaning it was bypassed during insert operations. This PR moves the uniqueness validation outside of the update logic so that it runs consistently during both insert and update operations.

I agree with Brian's comment on the initial issue though, I'm not fully sure what the alias is actually used for.

Testing Instructions

1. In the Joomla administrator, go to Components → Banners.
2. Create a new banner and name it "test".
3. Try to create a second banner also named "test" in the same category.

Actual result BEFORE applying this Pull Request

• Both banners are saved, resulting in two entries with the same alias in the same category.

Expected result AFTER applying this Pull Request

• Saving the second banner fails with an error.
• Only one banner with a specific alias per category is allowed.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed