fixed inventory

app/models/booking.rb

@@ -8,6 +8,7 @@ class Booking < ApplicationRecord
   belongs_to :sale, :optional => true
   has_many :booking_orders
   has_many :orders, :through => :booking_orders
+  has_many :order_items, :through => :orders
   scope :active, -> {where("booking_status != 'moved'")}
   scope :today, -> {where("created_at >= #{Time.now.utc}")}