AR mixin NoMethodError

I've searched on the net and found others have used mixins with AR in various ways.

I've done the following: File: ../models/my_mod.rb module MyMod     def self.doit     end end

File: ../models/my_model.rb class MyModel < ActiveRecord::Base     include MyMod     def do_this     end end

I believe I am using Mixins correctly, but it seems AR behaves differently. I am getting a NoMethodError with 'method_missing' when I try to use

MyModel.doit

in a controller. What am I missing? Is this the side-effect of AR's use of 'method_missing' to generate accessors dynamically?

Thanks for any thoughts,

Long