Single database for multiple shops

Use ActsAsTenant as Multi-tenancy for shops

See below files:
- app/controllers/concern/multi_tenancy.rb
- app/models/application_record.rb
- app/models/shop.rb

An initializer can be created to control option in ActsAsTenant.
config/initializers/acts_as_tenant.rb
require 'acts_as_tenant/sidekiq'
ActsAsTenant.configure do |config|
  config.require_tenant = false # true
end

more details: https://github.com/ErwinM/acts_as_tenant

app/models/order_reservation.rb

@@ -157,7 +157,7 @@ class OrderReservation < ApplicationRecord
     def self.update_doemal_payment(order,current_user,receipt_bill)
     	if(Sale.exists?(order.sale_id))
 	      saleObj = Sale.find(order.sale_id)
-	      shop_details =  Shop.first 
+	      shop_details =  Shop.current_shop 
 	      # rounding adjustment
 	      if shop_details.is_rounding_adj
 	        a = saleObj.grand_total % 25 # Modulus
@@ -194,7 +194,7 @@ class OrderReservation < ApplicationRecord
 
 	          	shift = ShiftSale.find(saleObj.shift_sale_id)
           	  	cashier_terminal = CashierTerminal.find(shift.cashier_terminal_id)
-          	  	shop_detail = Shop.first
+          	  	shop_detail = Shop.current_shop
           	  	order_reservation = OrderReservation.get_order_reservation_info(saleObj.sale_id)
           	  	if !cashier_terminal.nil?
 					# Calculate Food and Beverage Total
@@ -400,7 +400,7 @@ class OrderReservation < ApplicationRecord
     end
 
     def self.check_new_order
-    	shop = Shop.find_by_id(1)
+    	shop = Shop.current_shop
     	if !shop.shop_code.nil?
 			shop_code = shop.shop_code
 		else
@@ -418,7 +418,7 @@ class OrderReservation < ApplicationRecord
     end
 
     def self.check_order_send_to_kitchen
-    	shop = Shop.find_by_id(1)
+    	shop = Shop.current_shop
     	if !shop.shop_code.nil?
 			shop_code = shop.shop_code
 		else
@@ -436,7 +436,7 @@ class OrderReservation < ApplicationRecord
     end
 
     def self.check_order_ready_to_delivery
-    	shop = Shop.find_by_id(1)
+    	shop = Shop.current_shop
     	if !shop.shop_code.nil?
 			shop_code = shop.shop_code
 		else