[gen] Bugfixes.

fields/ref.py

@@ -921,8 +921,11 @@ class Ref(Field):
             # It is a tuple ('sort', method). Perform a full sort.
             refs.append(uid)
             tool = zobj.getTool()
-            refs.sort(key=lambda uid:self.insert[1](obj, \
+            # Warning: "refs" is a persistent list whose method "sort" has no
+            # param "key".
+            refs.data.sort(key=lambda uid:self.insert[1](obj, \
                                                 tool.getObject(uid, appy=True)))
+            refs._p_changed = 1
         # Update the back reference
         if not back: self.back.linkObject(value, obj, back=True)
 

fields/workflow.py

@@ -322,7 +322,7 @@ class Transition:
             # Condition is a role. Transition may be triggered if the user has
             # this role.
             return user.has_role(self.condition.name, obj)
-        elif type(self.condition) == types.FunctionType:
+        elif callable(self.condition):
             return self.condition(wf, obj.appy())
         elif type(self.condition) in (tuple, list):
             # It is a list of roles and/or functions. Transition may be