undefined method `name' for nil:NilClass Rails mailer views not rendering variables from controller

Question

I have a restaurant resource which has many reservations. I am trying to format the email that is sent after a reservation is created.

This is the error I get:

undefined method `name' for nil:NilClass

Code in my app/views/reservation_mailer/registration_confirmation.html.erb

<p>Thanks for reserving a spot for <%= @restaurant.name %>!</p>

The reservation_mailer.rb in the mailers folder:

class ReservationMailer < ActionMailer::Base
  default from: 'johnzw89@gmail.com'

  def registration_confirmation(restaurant, reservation)
    mail(:to => reservation.email, :subject => "Reservation")
    @restaurant = restaurant
    @reservation = reservation
  end

end

I have a new reservations form in the restaurant show page. Here is the reservations_controller:

  def create
    @restaurant = Restaurant.find(params[:restaurant_id])
    @reservation = @restaurant.reservations.new(params[:reservation])

    respond_to do |format|
      if @reservation.save
        ReservationMailer.registration_confirmation(@restaurant ,@reservation).deliver
        format.html { redirect_to @restaurant, notice: 'Reservation was successfully created.' }
        format.json { render json: @restaurant, status: :created, location: @restaurant }
      else
        format.html { render action: "new" }
        format.json { render json: @reservation.errors, status: :unprocessable_entity }
      end
    end
  end

I am not sure why @restaurant is not coming up. I suspect that the @restaurant variable from the reservations_controller is not passed to the registration_confirmation mailer method, but I am not sure... Any suggestions REALLY appreciated!

Thanks.

Answer 1

Have you tried changing order?

def registration_confirmation(restaurant, reservation)
  @restaurant, @reservation = restaurant, reservation
  mail(:to => reservation.email, :subject => "Reservation")
end