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@@ -1,5 +1,7 @@
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 *Edge*
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+* Run callbacks from object's metaclass [Josh Peek]
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+
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 * Add Array#in_groups which splits or iterates over the array in specified number of groups. #579. [Adrian Mugnolo] Example:
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   a = (1..10).to_a

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@@ -269,7 +269,15 @@ module ActiveSupport
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     #   pass
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     #   stop
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     def run_callbacks(kind, options = {}, &block)
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-      self.class.send("#{kind}_callback_chain").run(self, options, &block)
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+      callback_chain_method = "#{kind}_callback_chain"
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+
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+      # Meta class inherits Class so we don't have to merge it in 1.9
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+      if RUBY_VERSION >= '1.9'
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+        metaclass.send(callback_chain_method).run(self, options, &block)
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+      else
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+        callbacks = self.class.send(callback_chain_method) | metaclass.send(callback_chain_method)
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+        callbacks.run(self, options, &block)
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+      end
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     end
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   end
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 end

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@@ -84,6 +84,30 @@ class CallbacksTest < Test::Unit::TestCase
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   end
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 end
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+class MetaclassCallbacksTest < Test::Unit::TestCase
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+  module ModuleWithCallbacks
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+    def self.extended(object)
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+      object.metaclass.before_save :raise_metaclass_callback_called
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+    end
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+
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+    def module_callback_called?
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+      @module_callback_called ||= false
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+    end
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+
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+    def raise_metaclass_callback_called
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+      @module_callback_called = true
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+    end
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+  end
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+
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+  def test_metaclass_callbacks
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+    person = Person.new
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+    person.extend(ModuleWithCallbacks)
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+    assert !person.module_callback_called?
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+    person.save
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+    assert person.module_callback_called?
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+  end
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+end
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+
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 class ConditionalCallbackTest < Test::Unit::TestCase
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   def test_save_conditional_person
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     person = ConditionalPerson.new