fixed conflictsale item order order item

app/models/sale_item.rb

@@ -1,10 +1,14 @@
 class SaleItem < ApplicationRecord
+  #primary key - need to be unique generated for multiple shops
+  before_create :generate_custom_id
+
   belongs_to :sale
 
   #compute items - discount, tax, price_change
   def compute_item
   end
 
+
   def self.get_order_items_details(sale_id)
     sale_orders = SaleOrder.where("sale_id=?",sale_id)
     if sale_orders
@@ -17,5 +21,10 @@ class SaleItem < ApplicationRecord
     else
       return false
     end
+
+  private
+  def generate_custom_id
+    self.sale_item_id = SeedGenerator.generate_id(self.class.name, "SLI")
+
   end
 end