Change ActiveRecord::Base.inheritance_column in a rails app

问题

I want to use Single Table Inheritance using a column other than type. According to the Rails documentation - http://api.rubyonrails.org/classes/ActiveRecord/Base.html, I can do this by modifying ActiveRecord::Base.inheritance_column. How can I do this?

回答1:

Try the following:

class MyModel < ActiveRecord::Base
    self.inheritance_column = 'column_that_is_not_type'
end

Your migrations should work everywhere.

回答2:

@Vidya's answer is correct but a better way is:

class MyModel < ActiveRecord::Base
  # disable STI
  self.inheritance_column = :_type_disabled
end

来源：https://stackoverflow.com/questions/20294879/change-activerecordbase-inheritance-column-in-a-rails-app