README.md in rails-settings-cached-2.5.0 vs README.md in rails-settings-cached-2.5.1

@@ -160,12 +160,26 @@
   field :app_name, default: "Rails Settings", validates: { presence: true, length: { in: 2..20 } }
   field :default_locale, default: "zh-CN", validates: { presence: true, inclusion: { in: %w[zh-CN en jp], message: "is not included in [zh-CN, en, jp]" } }
 end
 ```
 
-Now validate will work on record save.
+Now validate will work on record save:
 
 ```rb
+irb> Setting.app_name = ""
+ActiveRecord::RecordInvalid: (Validation failed: App name can't be blank)
+irb> Setting.app_name = "Rails Settings"
+"Rails Settings"
+irb> Setting.default_locale = "zh-TW"
+ActiveRecord::RecordInvalid: (Validation failed: Default locale is not included in [zh-CN, en, jp])
+irb> Setting.default_locale = "en"
+"en"
+```
+
+Validate by `save` / `valid?` method:
+
+```rb
+
 setting = Setting.find_or_initialize_by(var: :app_name)
 setting.value = ""
 setting.valid?
 # => false
 setting.errors.full_messages