rails many to many self join -


Some can tell me in the right direction:

I try to make a model for rail Construction of the following:

Class AID

There are many "Class A" relations (hence it is a reference of itself)

I was looking for For the migration and model.

I'm not sure what the correct joining table is (I think this is a simple 2 column table class_id, classarial_id-> both point to the class) and how to construct a model <

I like something 

  class person & lt; ActiveRecord :: Base is has_many: friendship ,: foreign_key => "Person_id" ,: class_name = & gt; "Friendship" has moments: Friends ,: By & gt; : End Friendship of Friendship & lt; ActiveRecord :: Base is_to: person,: foreign_key = & gt; "Person_id" ,: class_name = & gt; "Person" belongs_to: friend,: foreign_key = & gt; "Friend_id" ,: class_name = & gt; "Person" will expire

and will be similar to tables 

  People: ID; Name; Whatever you need to befriend: ID; Person_id; Friend_id

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