Question: how do you feel about a new method to know if ransackable_attributes is defined?

[claudiob]

Hello and thanks for this awesome library.

I use it in a Rails app with many models: some of them are "ransackable" (displayed with a search form) while others are not.

I know that in order to be "ransackable" a model needs to define some methods.
I can call Model.ransackable_attributes and know if the those methods are defined: if they are not, I see this RuntimeError:

Ransack needs Model attributes explicitly allowlisted as searchable. 
Define a `ransackable_attributes` class method in your model…

So my way to know if a model is "ransackable" is this method:

def searchable?
  ransackable_attributes.any?
rescue RuntimeError
end

This works but… it's not great Ruby code. I would like to know without raising and then rescuing an error.

Would you be open in having such a method implement in the ransack codebase? Thanks!