lib/ruote/engine/process_error.rb in ruote-2.1.11 vs lib/ruote/engine/process_error.rb in ruote-2.2.0

@@ -1,7 +1,7 @@
 #--
-# Copyright (c) 2005-2010, John Mettraux, [e-mail]
+# Copyright (c) 2005-2011, John Mettraux, [e-mail]
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
 # in the Software without restriction, including without limitation the rights
 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
@@ -28,11 +28,11 @@
   #
   # Encapsulating all the information about an error in a process instance.
   #
   class ProcessError
 
-    def initialize (h)
+    def initialize(h)
       @h = h
     end
 
     def message
       @h['message']
@@ -63,11 +63,11 @@
     end
 
     # A shortcut for modifying the tree of an expression when it has had
     # an error upon being applied.
     #
-    def tree= (t)
+    def tree=(t)
       @h['msg']['tree'] = t
     end
 
     def to_h
       @h
@@ -81,21 +81,21 @@
     end
 
     # Exposes the workitem fields directly.
     #
     def fields
-      @h['msg']['workitem']['fields']
+      @h['msg']['workitem'] && @h['msg']['workitem']['fields']
     end
 
     # Returns an instance of Ruote::Workitem
     #
     def workitem
       Ruote::Workitem.new(msg['workitem'])
     end
 
     protected
 
-    def to_dot (opts)
+    def to_dot(opts)
 
       i = fei.to_storage_id
       label = "error : #{message.gsub(/"/, "'")}"
 
       [