class ContactsTasks < ActiveRecord::Base validates_presence_of :contact_id, :issue_id validates_uniqueness_of :contact_id, :scope => [:issue_id] after_create :send_mails after_save :send_mails private def send_mails Mailer.deliver_contacts_issue_connected(Contact.find(self.contact_id), Issue.find(self.issue_id)) return true end end