app/mailers/event_reminder_mailer.rb
class EventReminderMailer < NotificationMailer
def notify_creator event
@event = event
@type = 'reminder'
@need_creator_information = false
@subject = 'Reminder! Your event is happening soon.'
mail to: @event.user.email, subject: @subject, template_name: :event_reminder_mail
end
end