I guess you can.  Consider this code.

class Category < ActiveRecord::Base
end

class Subcategory < Category
end

I am inheriting Subcategory from Category.  The table's column 'type' 
will have values either 'Category' or 'Subcategory'.  If I change 
'Subcategory' to 'A' then my 'type' column is going to have 'Category' 
or 'A'

for ex.

class A < Category
end
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