Fix ActiveRecord::Relation#create and #create! scope leaking to

callbacks

Fixes rails#7391, rails#7853, rails#9894, rails#12305, rails#18952.

activerecord/CHANGELOG.md

@@ -1,3 +1,10 @@
+*   Fix `ActiveRecord::Relation#create` and `#create!` scope leaking to 
+    callbacks
+
+    Fixes #7391, #7853, #9894, #12305, #18952.
+
+    *Guilherme Goettems Schneider*
+
 ## Rails 5.0.0.beta4 (April 27, 2016) ##
 
 *   PostgreSQL: Support Expression Indexes and Operator Classes.

activerecord/lib/active_record/relation.rb

@@ -146,8 +146,12 @@ def new(*args, &block)
     #
     #   users.create(name: nil) # validation on name
     #   # => #<User id: nil, name: nil, ...>
-    def create(*args, &block)
-      scoping { @klass.create(*args, &block) }
+    def create(args = nil, &block)
+      if args.is_a?(Array)
+        args.map { |attr| create(attr, &block) }
+      else
+        new(args, &block).tap(&:save)
+      end
     end
 
     # Similar to #create, but calls
@@ -156,8 +160,12 @@ def create(*args, &block)
     #
     # Expects arguments in the same format as
     # {ActiveRecord::Base.create!}[rdoc-ref:Persistence::ClassMethods#create!].
-    def create!(*args, &block)
-      scoping { @klass.create!(*args, &block) }
+    def create!(args = nil, &block)
+      if args.is_a?(Array)
+        args.map { |attr| create!(attr, &block) }
+      else
+        new(args, &block).tap(&:save!)
+      end
     end
 
     def first_or_create(attributes = nil, &block) # :nodoc:

activerecord/test/cases/relations_test.rb

@@ -1327,6 +1327,24 @@ def test_create_bang
     assert_equal 'hen', hen.name
   end
 
+  def test_create_with_callback
+    parrot = Bird.create!(name: 'parrot', color: 'green')
+
+    birds = Bird.all
+    hen = birds.where(name: 'hen').create do |bird|
+      bird.evangelist = true
+      bird.color = 'blue'
+    end
+
+    assert_kind_of Bird, hen
+    assert hen.persisted?
+    assert_equal 'hen', hen.name
+    assert_equal 'blue', hen.color
+
+    parrot.reload
+    assert_equal 'blue', parrot.color
+  end
+
   def test_first_or_create
     parrot = Bird.where(:color => 'green').first_or_create(:name => 'parrot')
     assert_kind_of Bird, parrot

activerecord/test/models/bird.rb

@@ -9,4 +9,11 @@ class Bird < ActiveRecord::Base
   def cancel_save_callback_method
     throw(:abort)
   end
+
+  attr_accessor :evangelist
+  after_save :convert_all_to_my_color, if: :evangelist
+  def convert_all_to_my_color
+    self.class.update_all(color: color)
+  end
+
 end