Question

I wrote an upsert method for one of my models. I would like all my models to have this upsert method. It seemed to me that the logical solution was to define a model that inherits from ActiveRecord::Base and then have all my other models inherit from that. But if I do that, Rails complains that the new model I created doesn’t have a table to go with it, which is true, but I don’t care.

Since the way I tried is apparently not the right way to do it, what’s the right way to do it?

Answer 1

You can extend ActiveRecord with a module. you only do it in one place and it will be accessible for all models that inherits from ActiveRecord.

module YourModule
  def self.included(recipient)
    recipient.extend(ModelClassMethods)
    recipient.class_eval do
      include ModelInstanceMethods
    end
  end # #included directives

  # Class Methods
  module ModelClassMethods
    # A method accessible on model classes
    def whatever

    end
  end

  # Instance Methods
  module ModelInstanceMethods
    #A method accessible on model instances
    def another_one

    end
  end
end

#This is where your module is being included into ActiveRecord
if Object.const_defined?("ActiveRecord")
  ActiveRecord::Base.send(:include, YourModule)
end