Add monkey patch to statemachine to make #around_validation public (p…

…luginaweek/state_machine#295)

lib/has_messages.rb

@@ -1,4 +1,16 @@
 require 'state_machine'
+# Rails 4.1.0.rc1 and StateMachine don't play nice
+# https://github.com/pluginaweek/state_machine/issues/295
+require 'state_machine/version'
+unless StateMachine::VERSION == '1.2.0'
+  # If you see this message, please test removing this file
+  # If it's still required, please bump up the version above
+  puts "Please remove me, StateMachine version has changed"
+end
+
+module StateMachine::Integrations::ActiveModel
+  public :around_validation
+end
 
 # Adds a generic implementation for sending messages between users
 module HasMessages
@@ -76,7 +88,7 @@ def sent_messages
       messages.with_states(:queued, :sent)
     end
   end
- 
+
   module ActsAsMessageTopicInstanceMethods
     def topical_messages_for(receiver, recipient_state = nil)
       recipients_filter = MessageRecipient.with_receiver(receiver)