custom primary key for transaction

app/models/booking.rb

@@ -1,9 +1,14 @@
 class Booking < ApplicationRecord
+  before_create :generate_custom_id
   #primary key - need to be unique
-  
+
   belongs_to :dining_facility, :optional => true
   belongs_to :sale, :optional => true
   has_many :booking_orders
+  has_many :orders, :through => :booking_orders
 
-
+  private
+  def generate_custom_id
+    self.booking_id = SeedGenerator.generate_id(self.class.name, "BKI")
+  end
 end