Question

I would like to have functionality shared by several models to be abstracted into a module.

I have this model:

class Report < ActiveRecord::Base
  include AppModel
  has_and_belongs_to_many :tag
  belongs_to :city
  belongs_to :user
end

(also, how do I make my code span multiple lines on stackoverflow? it doesn`t preserve my newlines.)

Then I have a module (in app/models/app_model.rb):

module AppModel 
  def self.list
    find(:all, :order => 'name asc').map { |item| [item.name, item.id] }
   end
end

but if I do Report.list it doesn’t work. I suspect there’s a problem if in a module I do def function or def self.function?

So again my question is, how do I make accessible a function such as Report.list or Report.find_tagged that is defined in a module.

Answer 1

include mix the instances methods, not class-level. Use extend method or orverride include.

P.S. to use code-formatting on SO use {}