InteractionWorkflow.py: check script before execute script.

product/ERP5Workflow/Document/InteractionWorkflow.py

@@ -270,10 +270,10 @@ class InteractionWorkflow(IdAsReferenceMixin("", "prefix"), Workflow):
 
       before_script_list = []
       before_script_list.append(tdef.getBeforeScriptName())
-      if before_script_list != [] and tdef.getBeforeScriptName() is not None:
+      if tdef.getBeforeScriptName() is not None:
         for script_name in before_script_list:
-          script = self._getOb(script_name)
-          script(sci)
+          script = self._getOb(script_name, None)
+          if script: script(sci)
     return filtered_transition_list
 
   def notifySuccess(self, ob, transition_list, result, args=None, kw=None):
@@ -341,7 +341,7 @@ class InteractionWorkflow(IdAsReferenceMixin("", "prefix"), Workflow):
           # try to get the script without calling it.
           script = self.getScriptValueList()[script_name]
           # Pass lots of info to the script in a single parameter.
-          script(sci)  # May throw an exception
+          if script: script(sci)  # May throw an exception
 
       # Queue the "Before Commit" scripts
       sm = getSecurityManager()
@@ -357,7 +357,7 @@ class InteractionWorkflow(IdAsReferenceMixin("", "prefix"), Workflow):
       activity_script_list.append(tdef.getActivateScriptName())
       if activity_script_list != [] and tdef.getActivateScriptName() is not None:
         for script_name in activity_script_list:
-          self .activate(activity='SQLQueue')\
+          self.activate(activity='SQLQueue')\
               .activeScript(script_name, ob.getRelativeUrl(),
                             status, tdef.getId())