Deal Model

deal.rb

class Deal < ActiveRecord::Base
  
  # Associations
  has_and_belongs_to_many :stores
  belongs_to :user, :class_name => "User", :foreign_key => "merchant_id"
  has_many :punches
  
  # To-do: Validations
  # Add validations on the deals model
  
  # Callbacks
  before_create :setup_qr_code
  
  serialize :qr_blob
  
  def setup_qr_code
    ## Concatenate Deal ID, User ID, Store ID and Store Name and then take MD5
    # of this string, this goes into the DB as QR Code
    encrypted_string = ActiveSupport::SecureRandom.hex(13)
    self.qr_code = encrypted_string.encode('UTF-8')
    
    ## Now, using the above QR Code, create the QR Blob and save it in the 
    # Database
    qr_blob = RQRCode::QRCode.new(self.qr_code)
    self.qr_blob = qr_blob
  end
  
end