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/dinga_controller.rb

@@ -6,7 +6,7 @@ class Origami::DingaController < BaseOrigamiController
      @membership_rebate_balance=0
      @sale_data = Sale.find_by_sale_id(@sale_id)
      @receipt_no = @sale_data.receipt_no
-     @shop        = Shop.first 
+     @shop        = Shop.current_shop 
           if @shop.is_rounding_adj
                new_total    = Sale.get_rounding_adjustment(@sale_data.grand_total)
           else
@@ -77,7 +77,7 @@ def create
  account_no = params[:account_no]
  if(Sale.exists?(sale_id))
    saleObj = Sale.find(sale_id)
-   shop_details =  Shop.first 
+   shop_details =  Shop.current_shop 
       # rounding adjustment
       # if shop_details.is_rounding_adj
       #   new_total    = Sale.get_rounding_adjustment(saleObj.grand_total)