Update README.md

csdn-dev · Dec 19, 2012 · 652e944 · 652e944
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diff --git a/README.md b/README.md
@@ -100,5 +100,13 @@ class User < ActiveRecord::Base
   acts_as_cached(:version => 2, :expires_in => 1.week)
 end
 ```
+* It provides a great feature, not hits db when fetching record via unique key(not premery key). 
+```ruby
+# this will fetch from cache
+user = User.fetch_by_uniq_key("hooopo", :nick_name)
+
+# this also fetch from cache
+user = User.fetch_by_uniq_key!("hooopo", :nick_name) # this will raise `ActiveRecord::RecordNotFound` Exception when nick name not exists.
+```