Orders controller -> Worker -> Mailer

orders_controller_etc.rb

# Version 1:

def perform(order_attributes, user_attributes, order_total)
  UserMailer.order_confirmation(order_attributes, user_attributes, order_total).deliver
end

def order_confirmation(user_attributes, order_attributes, order_total)
  @user = user_attributes
  @order = order_attributes
  @total = order_total
  @url2 = 'http://fourth-meal.herokuapp.com'
  mail(to: @user[:email],
          subject: 'Thank you for your order!')
end

# Version 2: 

def perform(order_id, user_id)
  UserMailer.order_confirmation(order_id, user_id).deliver
end

def order_confirmation(order_id, user_id)
  @user = User.find(user_id)
  @order = Order.find(order_id)
  mail(to @user.email, subject: "Thank you for your order!")
end