Inverse of doesn't work.

inverse_of_example.rb

class Communication::Message < ActiveRecord::Base
  belongs_to :conversation_for_proposal, {
    :class_name  => 'Communication::Conversation::ForProposal',
    :foreign_key => :conversation_id,
    :inverse_of  => :messages_for_proposal
  }
end

class Communication::Conversation::ForProposal < ActiveRecord::Base
  has_many :messages_for_proposal, {
    :class_name  => 'Communication::Message',
    :foreign_key => :conversation_id,
    :inverse_of  => :conversation_for_proposal
  }
end

Communication::Message.new.build_conversation_for_proposal
  .messages_for_proposal == []