Ruby on Rails

Hi,

I'm wondering how to write or read an additional attribute in the
through table.
Beside the foreign key, I have in the 'Responsible' table an additional
data field 'type' to set the kind of 'responsibility' for the company.
Can I access it from the user or company model?

class User < ActiveRecord::Base
has_many :responsibles
has_many :companies, :through => :responsibles
end

class Company < ActiveRecord::Base
has_many :responsibles
has_many :users, :through => :responsibles
end

class Responsible < ActiveRecord::Base
# datafields: user_id, company_id, type:string
belongs_to :user
belongs_to :company
end

Thanks!

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