[code_smells] - callback

callback.rb

# source: ruby science ebook

# app/models/survey_inviter.rb
def deliver_invitations recipients.map do |recipient_email|
  Invitation.create!(
    survey: survey,
    sender: sender,
    recipient_email: recipient_email, 
    status: 'pending',
    message: @message 
  )
  end 
end

# app/models/invitation.rb
after_create :deliver

# app/models/invitation.rb
def deliver 
  Mailer.invitation_notification(self).deliver
end