README.md in n1_loader-1.4.2 vs README.md in n1_loader-1.4.3

@@ -29,15 +29,35 @@
 ```
 
 You can add integration with [ActiveRecord][5] by:
 ```ruby
 gem 'n1_loader', require: 'n1_loader/active_record'
+
+# You also may be interested in injecting it to models
+class ActiveRecord::Base
+  include N1Loader::Loadable
+  
+  def reload(*)
+    n1_clear_cache
+    super
+  end
+end
 ```
 
 You can add the integration with [ActiveRecord][5] and [ArLazyPreload][6] by:
 ```ruby
 gem 'n1_loader', require: 'n1_loader/ar_lazy_preload'
+
+# You also may be interested in injecting it to models
+class ActiveRecord::Base
+  include N1Loader::Loadable
+
+  def reload(*)
+    n1_clear_cache
+    super
+  end
+end
 ```
 
 ## Usage
 
 ```ruby
@@ -218,10 +238,10 @@
 ```ruby
 class User
   include N1Loader::Loadable
 
   n1_optimized :orders_count do
-    argument :sale 
+    argument :sale, optional: true, default: -> { Sale.last }
     
     cache_key { sale.id }
     
     def perform(users)
       orders_per_user = Order.where(sale: sale, user: users).group(:user_id).count
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