Link attribure of models

[romaluca]

I have a problem
I have a db with 2 tables

MAILS: id, receiver_id,sender_id,message

USERS: id, name

How i can do to link the attributes of models: receiver_id and sender_id with the id of the user's table?
For link i mean insert: belongs_to has_many...

If there aren't the 2 attributes but only receiver_id i can rename receiver_id like user_id and so i can set models like this:

class User < ActiveRecord::Base
has_many:mails
end

class Mail < ActiveRecord::Base
belongs_to:user
end

[Luke Redpath]

Try this:

class Mail < ActiveRecord::Base
  belongs_to :receiver, :class_name => 'User'
  belongs_to :sender,   :class_name => 'User'
end

[romaluca]

Thanks for the response.
do User class works so?
class User < ActiveRecord::Base
has_many:mails
end

[Luke Redpath]

You might need to do it like this:

class User < ActiveRecord::Base
  has_many :received_mails, :class_name => 'Mail', :foreign_key => 'received_id'
  has_many :sent_mails, :class_name => 'Mail', :foreign_key => 'sender_id'