Having a clean code with single responsibility is important, and doing that for model filtering can be easy and very powerful. Believe me.
This blog post is related to a talk I gave on April, 2018 on Darkmira Tour PHP 2018, in Brasília/DF, Brazil, with the same title. The slides are on SpeakerDeck.
Filtering models was, for a very long time, a hard task for me. I admit that I could not think in some easy way to do that. I tried, refactored some code, created custom classes for that, but I never thought how this could be easily implemented.
Watching a Laracast’s video from 2016 about the Laravel’s Eloquent ORM I faced of with a bunch of classes and a trait that removed a lot of trash from my controller actions. That was called by Jeffrey Way the QueryFilter.