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/concerns/login_verification.rb

@@ -3,7 +3,7 @@ module LoginVerification
 
   included do
     before_action :authenticate_session_token
-    helper_method :current_company,:current_shop, :current_login_employee, :current_user, :get_cashier, :order_reservation, :bank_integration, :shop_detail
+    helper_method :current_company, :current_shop, :current_login_employee, :current_user, :get_cashier, :order_reservation, :bank_integration, :shop_detail
   end
 
   #this is base api base controller to need to inherit.
@@ -19,7 +19,7 @@ module LoginVerification
 
   def current_shop
     begin
-     return Shop.first
+      return Shop.current_shop
     rescue
       return nil
     end
@@ -41,7 +41,7 @@ module LoginVerification
 
   #Shop Name in Navbor
   def shop_detail
-    @shop = Shop.first
+    @shop = current_shop
   end
 
   #check order reservation used
@@ -78,11 +78,11 @@ module LoginVerification
 
   protected
   # Authenticate the user with token based authentication
-  def authenticate   
-    authenticate_session_token || render_unauthorized    
+  def authenticate
+    authenticate_session_token || render_unauthorized
   end
 
-  def authenticate_session_token    
+  def authenticate_session_token
     token = session[:session_token]
     if (token)
       #@current_user = User.find_by(api_key: token)

app/controllers/concerns/multi_tenancy.rb

@@ -0,0 +1,20 @@
+module MultiTenancy
+  extend ActiveSupport::Concern
+
+  included do
+    set_current_tenant_through_filter if respond_to? :set_current_tenant_through_filter
+    before_action :find_shop_by_subdomain_or_frist if respond_to? :before_action
+    helper_method :current_shop if respond_to? :helper_method
+  end
+
+  private
+  def find_shop_by_subdomain_or_frist
+    if request.subdomain.present?
+      shop_code = request.subdomain.partition('-').last
+      shop = Shop.find_by(shop_code: shop_code)
+    else
+      shop = Shop.first
+    end
+    set_current_tenant(shop)
+  end
+end