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/controllers/origami/redeem_payments_controller.rb

@@ -6,7 +6,7 @@ class Origami::RedeemPaymentsController < BaseOrigamiController
  		@membership_rebate_balance=0
  		sale_data = Sale.find_by_sale_id(@sale_id)
 
-        @shop        = Shop.first 
+        @shop        = Shop.current_shop 
         if @shop.is_rounding_adj
              new_total    = Sale.get_rounding_adjustment(sale_data.grand_total)
         else