lib/aasm/aasm.rb in aasm-3.0.19 vs lib/aasm/aasm.rb in aasm-3.0.20

@@ -1,9 +1,13 @@
 module AASM
 
   def self.included(base) #:nodoc:
     base.extend AASM::ClassMethods
+
+    # do not overwrite existing state machines, which could have been created by
+    # inheritance, see class method inherited
     AASM::StateMachine[base] ||= AASM::StateMachine.new('')
+
     AASM::Persistence.load_persistence(base)
     super
   end
 
   module ClassMethods