Revisit OOP fundumentals

Inheritance
Polymorphism
Abstraction
Encapsulation

Rails - Define class method in module file

module PicturePartials
module Cse

def self.included(base)
base.extend ClassMethods
end

module ClassMethods
def find_by_picture_id(picture_id)
Picture.joins(:picture).where('picture_id = ?', picture_id).first
end
end


end
end