Renamed Mixins to Acts to resemble the change from include ActiveRecord::Mixins::List to acts_as_list and renamed @@default_error_messagess to @@default_error_messages

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@190 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 17 insertions, 9 deletions

diff --git a/activerecord/README b/activerecord/README
index 258b98f296..e5a5e5a6d8 100755
--- a/activerecord/README
+++ b/activerecord/README
@@ -57,18 +57,26 @@ A short rundown of the major features:
 
 * Validation rules that can differ for new or existing objects.
 
-   class Post < ActiveRecord::Base
-     def validate # validates on both creates and updates
-       errors.add_on_empty "title"
-     end
-
-     def validate_on_update
-       errors.add_on_empty "password"
-     end
-   end
+    class Account < ActiveRecord::Base
+      validates_presence_of     :subdomain, :name, :email_address, :password
+      validates_uniqueness_of   :subdomain
+      validates_acceptance_of   :terms_of_service, :on => :create
+      validates_confirmation_of :password, :email_address, :on => :create
+    end
 
   Learn more in link:classes/ActiveRecord/Validations.html
 
+
+* Acts that can make records work as lists or trees:
+
+    class Item < ActiveRecord::Base
+      belongs_to   :list
+      acts_as_list :scope => :list
+    end
+    
+    item.move_higher
+    item.move_to_bottom
+
  
 * Callbacks as methods or queues on the entire lifecycle (instantiation, saving, destroying, validating, etc).