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I have multiple Active Record data models in Ruby on Rails that need to share class methods. I could easily declare the methods in all the classes but that is against the DRY principle.
I’ve looked at declaring a module and using ‘include’ to mixin the code but that seems to only work with instance methods, not class methods.
What is the preferred way to do this in Ruby/Rails? (I tried to create a base ActiveRecord class and inherit from that, but ActiveRecord freaked out).
The ClassMethods idiom is a common way for a module to supply both class and instance methods: http://railstips.org/blog/archives/2009/05/15/include-vs-extend-in-ruby/
ActiveRecord shouldn’t freak out if you create an abstract base class, as long as you call
self.abstract_class = truein that class: http://api.rubyonrails.org/classes/ActiveRecord/Inheritance/ClassMethods.html