gistfile2.txt

hr_arrival_collaborator.rb

class HrArrivalCollaborator < ActiveRecord::Base
  belongs_to :feedback
  belongs_to :agency
  belongs_to :function

  validates_presence_of :feedback, :agency, :function, :lastname, :firstname, :lastname, :email
  validates_uniqueness_of :email

  def validate
    errors.add("email", "has already been token") if Collaborator.all.map(&:email).include?(self.email)
  end
end