Cannot include module in model

Question

I\'m using

Ruby version              1.8.7
Rails version             3.0.3

I have a method called alive in every model of my rails app:

Answer 1

include will treat those methods as instance methods, not class methods. What you want to do is this:

module LifeControl    
  module ClassMethods
    def alive
      where('deleter is null')  
    end   

    def dead
      where('deleter is not null')  
    end    
  end

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

This way, alive and dead will be available on the class itself, not instances thereof.