[Autocomplete] Fix handling of associated properties in DQL joins

[HugoSEIGLE]

Q	A
Bug fix?	yes
New feature?	no
Issues	Fix #2370
License	MIT

Changes:

• The alias generation logic has been improved to correctly handle nested associations and avoid alias collisions.
• The code was modified to ensure that the parent entity is correctly accounted for when generating aliases, which helps prevent issues in complex joins with multiple associated entities.
• A check was added to verify the existence of a parent property before using it as part of the alias. This prevents logical errors in cases where the parent entity is not directly involved in the join.

[smnandre]

This seems very legit: do you think you could add a test or two ?

[HugoSEIGLE]

This seems very legit: do you think you could add a test or two ?

Thank you for the feedback! I’ve already added tests in "Symfony\UX\Autocomplete\Tests\Functional\FieldAutocompleterTest". Let me know if there are fix to add or additional scenarios you'd like me to cover.

[smnandre]

Hey @HugoSEIGLE!

Thank you for the added tests!

To be honest I do feel this entire class deserves a big clean / refacto (code style, performance, and code readability)..

But this is way outside the scope of this PR.. that does fix a bug.. so thank you for this and we'll try to refactor it later.

:)