--- a/web/views/autoform.py	Tue Jun 01 17:44:55 2010 +0200
+++ b/web/views/autoform.py	Thu Jun 03 10:20:00 2010 +0200
@@ -650,13 +650,13 @@
     # pre 3.8.3 compat
     def set_action(self, action):
         self._action = action
-    @deprecated('[3.9] use form.form_action()')
     def get_action(self):
         try:
             return self._action
         except AttributeError:
             return self._cw.build_url(self._default_form_action_path)
-    action = property(get_action, set_action)
+    action = property(deprecated('[3.9] use form.form_action()')(get_action),
+                      set_action)
 
     @iclassmethod
     def field_by_name(cls_or_self, name, role=None, eschema=None):

--- a/web/views/forms.py	Tue Jun 01 17:44:55 2010 +0200
+++ b/web/views/forms.py	Thu Jun 03 10:20:00 2010 +0200
@@ -196,9 +196,13 @@
 
     _default_form_action_path = 'edit'
     def form_action(self):
-        if self.action is None:
+        try:
+            action = self.get_action() # avoid spurious warning w/ autoform bw compat property
+        except AttributeError:
+            action = self.action
+        if action is None:
             return self._cw.build_url(self._default_form_action_path)
-        return self.action
+        return action
 
     @deprecated('[3.6] use .add_hidden(name, value, **kwargs)')
     def form_add_hidden(self, name, value=None, **kwargs):