ActiveRecord::Migration is a mix-in?

Thufir · November 22, 2007, 3:14am

class AddUserIdToPosts < ActiveRecord::Migration

AddUserIdToPosts is a class, ok. ActiveRecord is a module, ok.
Migration is a class? This is an example of a mix-in?

I don't really understand this line

-Thufir

Topic		Replies	Views
Persistence as a mix-in rather than inherited behaviour rubyonrails-talk	0	125	February 29, 2008
when and how to use ActiveRecord::Migration rubyonrails-talk	3	148	October 13, 2009
Can you use a mixin to add action methods to an ActionController? rubyonrails-talk	4	462	May 16, 2007
Calling class methods from included module rubyonrails-talk	0	124	January 4, 2009
subclassing vs mixins, which one should be used? rubyonrails-talk	7	135	December 11, 2008