# HG changeset patch
# User sylvain.thenault@logilab.fr
# Date 1239374883 -7200
# Node ID 2e552353c42a4e0c7e59cd89c855cb3912c988f9
# Parent  1ad1a174da77d1d9a33d7949dee4f1caeee9e300
insert an optgroup as separator on None values

diff -r 1ad1a174da77 -r 2e552353c42a web/formwidgets.py
--- a/web/formwidgets.py	Fri Apr 10 16:47:15 2009 +0200
+++ b/web/formwidgets.py	Fri Apr 10 16:48:03 2009 +0200
@@ -167,7 +167,10 @@
         name, curvalues, attrs = self._render_attrs(form, field)
         options = []
         for label, value in field.vocabulary(form):
-            if value in curvalues:
+            if value is None:
+                # handle separator
+                options.append(u'<optgroup label="%s"/>' % (label or ''))
+            elif value in curvalues:
                 options.append(tags.option(label, value=value, selected='selected'))
             else:
                 options.append(tags.option(label, value=value))