Implement Relation#create and Relation#create!

activerecord/lib/active_record/relation.rb

@@ -16,7 +16,15 @@ def initialize(klass, relation)
     end
 
     def new(*args, &block)
-      @klass.send(:with_scope, :create => create_scope) { @klass.new(*args, &block) }
+      with_create_scope { @klass.new(*args, &block) }
+    end
+
+    def create(*args, &block)
+      with_create_scope { @klass.create(*args, &block) }
+    end
+
+    def create!(*args, &block)
+      with_create_scope { @klass.create!(*args, &block) }
     end
 
     def merge(r)
@@ -185,6 +193,10 @@ def method_missing(method, *args, &block)
       end
     end
 
+    def with_create_scope
+      @klass.send(:with_scope, :create => create_scope) { yield }
+    end
+
     def create_scope
       @create_scope ||= wheres.inject({}) do |hash, where|
         hash[where.operand1.name] = where.operand2.value if where.is_a?(Arel::Predicates::Equality)

activerecord/test/cases/relations_test.rb

@@ -10,6 +10,7 @@
 require 'models/entrant'
 require 'models/developer'
 require 'models/company'
+require 'models/bird'
 
 class RelationTest < ActiveRecord::TestCase
   fixtures :authors, :topics, :entrants, :developers, :companies, :developers_projects, :accounts, :categories, :categorizations, :posts, :comments,
@@ -493,4 +494,27 @@ def test_scoped_build
     assert_equal 'You told a lie', post.title
   end
 
+  def test_create
+    birds = Bird.scoped
+
+    sparrow = birds.create
+    assert_kind_of Bird, sparrow
+    assert sparrow.new_record?
+
+    hen = birds.where(:name => 'hen').create
+    assert ! hen.new_record?
+    assert_equal 'hen', hen.name
+  end
+
+  def test_create_bang
+    birds = Bird.scoped
+
+    assert_raises(ActiveRecord::RecordInvalid) { birds.create! }
+
+    hen = birds.where(:name => 'hen').create!
+    assert_kind_of Bird, hen
+    assert ! hen.new_record?
+    assert_equal 'hen', hen.name
+  end
+
 end