4 files changed, 18 insertions, 13 deletions
diff --git a/activemodel/lib/active_model/state_machine.rb b/activemodel/lib/active_model/state_machine.rb
index 96df6539ae..bce90fd743 100644
--- a/activemodel/lib/active_model/state_machine.rb
+++ b/activemodel/lib/active_model/state_machine.rb
@@ -1,14 +1,10 @@
-Dir[File.dirname(__FILE__) + "/state_machine/*.rb"].sort.each do |path|
-  filename = File.basename(path)
-  require "active_model/state_machine/#{filename}"
-end
-
 module ActiveModel
   module StateMachine
     class InvalidTransition < Exception
     end
 
     def self.included(base)
+      require 'active_model/state_machine/machine'
       base.extend ClassMethods
     end
 
@@ -35,6 +31,12 @@ module ActiveModel
         state_machines[name] ||= Machine.new(self, name)
         block ? state_machines[name].update(options, &block) : state_machines[name]
       end
+
+      def define_state_query_method(state_name)
+        name = "#{state_name}?"
+        undef_method(name) if method_defined?(name)
+        class_eval "def #{name}; current_state.to_s == %(#{state_name}) end"
+      end
     end
 
     def current_state(name = nil, new_state = nil, persist = false)
@@ -63,4 +65,4 @@ module ActiveModel
       end
     end
   end
-end
-\ No newline at end of file
+end
diff --git a/activemodel/lib/active_model/state_machine/event.rb b/activemodel/lib/active_model/state_machine/event.rb
index 8acde7fd47..3eb656b6d6 100644
--- a/activemodel/lib/active_model/state_machine/event.rb
+++ b/activemodel/lib/active_model/state_machine/event.rb
@@ -1,3 +1,5 @@
+require 'active_model/state_machine/state_transition'
+
 module ActiveModel
   module StateMachine
     class Event
diff --git a/activemodel/lib/active_model/state_machine/machine.rb b/activemodel/lib/active_model/state_machine/machine.rb
index 170505c0b2..a5ede021b1 100644
--- a/activemodel/lib/active_model/state_machine/machine.rb
+++ b/activemodel/lib/active_model/state_machine/machine.rb
@@ -1,7 +1,11 @@
+require 'active_model/state_machine/state'
+require 'active_model/state_machine/event'
+
 module ActiveModel
   module StateMachine
     class Machine
-      attr_accessor :initial_state, :states, :events, :state_index
+      attr_writer :initial_state
+      attr_accessor :states, :events, :state_index
       attr_reader :klass, :name
 
       def initialize(klass, name, options = {}, &block)
@@ -71,4 +75,4 @@ module ActiveModel
       end
     end
   end
-end
-\ No newline at end of file
+end
diff --git a/activemodel/lib/active_model/state_machine/state.rb b/activemodel/lib/active_model/state_machine/state.rb
index 68eb2aa34a..76916b1d86 100644
--- a/activemodel/lib/active_model/state_machine/state.rb
+++ b/activemodel/lib/active_model/state_machine/state.rb
@@ -5,11 +5,8 @@ module ActiveModel
 
       def initialize(name, options = {})
         @name = name
-        machine = options.delete(:machine)
-        if machine
-          machine.klass.send(:define_method, "#{name}?") do
-            current_state.to_s == name.to_s
-          end
+        if machine = options.delete(:machine)
+          machine.klass.define_state_query_method(name)
         end
         update(options)
       end