Rename first_or_new to first_or_initialize.

For consistency with find_or_initialize_by. Also remove first_or_build
alias.

activerecord/CHANGELOG

@@ -4,10 +4,12 @@ Wed Sep  7 15:25:02 2011  Aaron Patterson <aaron@tenderlovemaking.com>
 	  keys are per process id.
 	* lib/active_record/connection_adapters/sqlite_adapter.rb: ditto
 
-* Add first_or_create, first_or_create!, first_or_build and first_or_new methods to Active Record. This is a better approach over the old find_or_create_by dynamic methods because it's clearer which arguments are used to find the record and which are used to create it:
+* Add first_or_create, first_or_create!, first_or_initialize methods to Active Record. This is a
+  better approach over the old find_or_create_by dynamic methods because it's clearer which
+  arguments are used to find the record and which are used to create it:
+
+    User.where(:first_name => "Scarlett").first_or_create!(:last_name => "Johansson")
 
-    User.where(:first_name => "Scarlett").first_or_create!(:last_name => "Johansson", :hot => true)
-    
   [Andrés Mejía]
 
 * Support bulk change_table in mysql2 adapter, as well as the mysql one. [Jon Leighton]

activerecord/lib/active_record/base.rb

@@ -442,7 +442,7 @@ module ActiveRecord #:nodoc:
 
     class << self # Class methods
       delegate :find, :first, :first!, :last, :last!, :all, :exists?, :any?, :many?, :to => :scoped
-      delegate :first_or_create, :first_or_create!, :first_or_new, :first_or_build, :to => :scoped
+      delegate :first_or_create, :first_or_create!, :first_or_initialize, :to => :scoped
       delegate :destroy, :destroy_all, :delete, :delete_all, :update, :update_all, :to => :scoped
       delegate :find_each, :find_in_batches, :to => :scoped
       delegate :select, :group, :order, :except, :reorder, :limit, :offset, :joins, :where, :preload, :eager_load, :includes, :from, :lock, :readonly, :having, :create_with, :to => :scoped

activerecord/lib/active_record/relation.rb

@@ -132,10 +132,9 @@ module ActiveRecord
     # Like <tt>first_or_create</tt> but calls <tt>new</tt> instead of <tt>create</tt>.
     #
     # Expects arguments in the same format as <tt>Base.new</tt>.
-    def first_or_new(attributes = nil, options = {}, &block)
+    def first_or_initialize(attributes = nil, options = {}, &block)
       first || new(attributes, options, &block)
     end
-    alias :first_or_build :first_or_new
 
     def respond_to?(method, include_private = false)
       arel.respond_to?(method, include_private)     ||

activerecord/test/cases/base_test.rb

@@ -294,16 +294,8 @@ class BasicsTest < ActiveRecord::TestCase
     assert_equal parrot, the_same_parrot
   end
 
-  def test_first_or_new
-    parrot = Bird.first_or_new(:color => 'green', :name => 'parrot')
-    assert_kind_of Bird, parrot
-    assert !parrot.persisted?
-    assert parrot.new_record?
-    assert parrot.valid?
-  end
-
-  def test_first_or_build
-    parrot = Bird.first_or_build(:color => 'green', :name => 'parrot')
+  def test_first_or_initialize
+    parrot = Bird.first_or_initialize(:color => 'green', :name => 'parrot')
     assert_kind_of Bird, parrot
     assert !parrot.persisted?
     assert parrot.new_record?

activerecord/test/cases/relations_test.rb

@@ -956,8 +956,8 @@ class RelationTest < ActiveRecord::TestCase
     assert_raises(ActiveRecord::RecordInvalid) { Bird.where(:color => 'green').first_or_create!([ {:name => 'parrot'}, {:pirate_id => 1} ]) }
   end
 
-  def test_first_or_new
-    parrot = Bird.where(:color => 'green').first_or_new(:name => 'parrot')
+  def test_first_or_initialize
+    parrot = Bird.where(:color => 'green').first_or_initialize(:name => 'parrot')
     assert_kind_of Bird, parrot
     assert !parrot.persisted?
     assert parrot.valid?
@@ -966,8 +966,8 @@ class RelationTest < ActiveRecord::TestCase
     assert_equal 'green', parrot.color
   end
 
-  def test_first_or_new_with_no_parameters
-    parrot = Bird.where(:color => 'green').first_or_new
+  def test_first_or_initialize_with_no_parameters
+    parrot = Bird.where(:color => 'green').first_or_initialize
     assert_kind_of Bird, parrot
     assert !parrot.persisted?
     assert !parrot.valid?
@@ -975,8 +975,8 @@ class RelationTest < ActiveRecord::TestCase
     assert_equal 'green', parrot.color
   end
 
-  def test_first_or_new_with_block
-    parrot = Bird.where(:color => 'green').first_or_new { |bird| bird.name = 'parrot' }
+  def test_first_or_initialize_with_block
+    parrot = Bird.where(:color => 'green').first_or_initialize { |bird| bird.name = 'parrot' }
     assert_kind_of Bird, parrot
     assert !parrot.persisted?
     assert parrot.valid?
@@ -985,12 +985,6 @@ class RelationTest < ActiveRecord::TestCase
     assert_equal 'parrot', parrot.name
   end
 
-  def test_first_or_build_is_alias_for_first_or_new
-    birds = Bird.scoped
-    assert birds.respond_to?(:first_or_build)
-    assert_equal birds.method(:first_or_new), birds.method(:first_or_build)
-  end
-
   def test_explicit_create_scope
     hens = Bird.where(:name => 'hen')
     assert_equal 'hen', hens.new.name