Laravel 9 Support and Request Data Transformation

[brendt]

There's a problem with Laravel 9: the underlying Symfony 6 components introduce a breaking change in what data can be returned from InputBag: symfony/symfony#44432 (only scalar data can be returned anymore).

We have a feature called Request Data Transformation that overwrites request data with enum objects. In Laravel 9, this feature simply won't work anymore because of Symfony's internal InputBag changes.

There are several ways to mitigate this issue:

• Still support it in L8, but disallow the feature in L9, requiring a new major release
• Drop support for request data transformation all together in a new major release
• Try to refactor the current implementation, possibly requiring a new major release

[brendt]

FWIW, my personal preference is option 1 or 2

[brendt]

A quick update: part of this can be fixed by using $request->input() instead of $request->get() or $request->query->get(), however, there's also the possibility to directly transform enums on the inputbag via $request->request->get(), which we can't fix.

[brendt]

Final version: https://github.com/spatie/laravel-enum/blob/main/CHANGELOG.md#300---2022-02-03