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*Edge*
+* change_column_default preserves the not-null constraint. #617 [Tarmo Tänav]
+
+* Fixed that create database statements would always include "DEFAULT NULL" (Nick Sieger) [#334]
+
+* Add :accessible option to associations for allowing (opt-in) mass assignment. #474. [David Dollar] Example :
+
+ class Post < ActiveRecord::Base
+ belongs_to :author, :accessible => true
+ has_many :comments, :accessible => true
+ end
+
+ post = Post.create({
+ :title => 'Accessible Attributes',
+ :author => { :name => 'David Dollar' },
+ :comments => [
+ { :body => 'First Post!' },
+ { :body => 'Nested Hashes are great!' }
+ ]
+ })
+
+ post.comments << { :body => 'Another Comment' }
+
+* Add :tokenizer option to validates_length_of to specify how to split up the attribute string. #507. [David Lowenfels] Example :
+
+ # Ensure essay contains at least 100 words.
+ validates_length_of :essay, :minimum => 100, :too_short => "Your essay must be at least %d words."), :tokenizer => lambda {|str| str.scan(/\w+/) }
+
+* Allow conditions on multiple tables to be specified using hash. [Pratik Naik]. Example:
+
+ User.all :joins => :items, :conditions => { :age => 10, :items => { :color => 'black' } }
+ Item.first :conditions => { :items => { :color => 'red' } }
+
+* Always treat integer :limit as byte length. #420 [Tarmo Tänav]
+
+* Partial updates don't update lock_version if nothing changed. #426 [Daniel Morrison]
+
+* Fix column collision with named_scope and :joins. #46 [Duncan Beevers, Mark Catley]
+
+* db:migrate:down and :up update schema_migrations. #369 [Michael Raidel, RaceCondition]
+
+* PostgreSQL: support :conditions => [':foo::integer', { :foo => 1 }] without treating the ::integer typecast as a bind variable. [Tarmo Tänav]
+
+* MySQL: rename_column preserves column defaults. #466 [Diego Algorta]
+
* Add :from option to calculations. #397 [Ben Munat]
* Add :validate option to associations to enable/disable the automatic validation of associated models. Resolves #301. [Jan De Poorter]