lib/music-transcription/model/change.rb in music-transcription-0.17.1 vs lib/music-transcription/model/change.rb in music-transcription-0.19.0

@@ -15,28 +15,34 @@
     self.duration == other.duration
   end
 
   class Immediate < Change
     include Validatable
-    
-    @@check_methods = [ :ensure_zero_duration ]
+
     def initialize value
       super(value,0)
     end
     
+    def check_methods
+      [ :ensure_zero_duration ]
+    end
+    
     def ensure_zero_duration
       unless @duration == 0
         raise NonZeroError, "immediate change duration #{self.duration} must be 0"
       end
     end
   end
   
   class Gradual < Change
     include Validatable
     
-    @@check_methods = [ :ensure_nonnegative_duration ]
     def initialize value, transition_duration
       super(value, transition_duration)
+    end
+    
+    def check_methods
+      [ :ensure_nonnegative_duration ]
     end
     
     def ensure_nonnegative_duration
       if @duration < 0
         raise NegativeError, "gradual change duration #{self.duration} must be non-negative"
\ No newline at end of file