I have read a lot of stackoverflows talking about concerns, and I have a main question:
It seems concerns in models are something like the new "application_model.rb" since models share code trough it and is fantastic -> IS IT CORRECT?. Well, if I'm more or less correct, Why do we have concerns into controller if already we have application_controller? If is possible, Can you recommend a link about how to use concerns in controller? Thanks in advance!
