multiple belongs_to relationships between two classes in Rails

Question

I have a Transaction class. Each object of this class includes one issuing account, one sending account and one receiving account. Each of these is an instance of Account cl

Answer 1

Use :class_name to specify the class name, when it can't be guessed from the association name:

class Transaction
  belongs_to :issuer,   :class_name => 'Account'
  belongs_to :sender,   :class_name => 'Account'
  belongs_to :receiver, :class_name => 'Account'
end

class Account
  has_many :issued_transactions,   :foreign_key => :issuer,   :class_name => 'Transaction'
  has_many :sent_transactions,     :foreign_key => :sender,   :class_name => 'Transaction'
  has_many :received_transactions, :foreign_key => :receiver, :class_name => 'Transaction'
end

You can read more in the documentation.