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Hey, I have been looking at ActiveRecord''s serialization code, and noticed that ActiveRecord::XmlSerializer#serializable_attributes purposely excludes the STI inheritance column per ``options[:except] = Array(options[:except]) | Array(@record.class.inheritance_column).'''' Is there a particular reason for this? Would anyone be opposed to my writing a patch to have this

I wonder if you can have more than one has_many :through association between 2 models. For example... I have a model Teacher and a model Class Now, 1 Teacher works in many Classes, right?. So I need a join model like class Work < ActiveRecord::Base belongs_to :teacher belongs_to :class end But I also would like to know if a teacher CAN teach a class before I