# HG changeset patch
# User Alexandre Fayolle <alexandre.fayolle@logilab.fr>
# Date 1273163019 0
# Node ID 96fd339f7917ed01ecc9f1d7d5664e84f55bdc1d
# Parent  d1b6db4d7b3fc30250b4933da4cb97ccf18fcc4f
Handle new way of reporting unmodified FileFields

when a FileField has not been modified, value is an empty string.
Handle this is raise UnmodifiedField accordingly.

diff -r d1b6db4d7b3f -r 96fd339f7917 web/formfields.py
--- a/web/formfields.py	Thu May 06 14:48:44 2010 +0200
+++ b/web/formfields.py	Thu May 06 16:23:39 2010 +0000
@@ -724,7 +724,10 @@
             # will try to remove already attached file if any
             raise UnmodifiedField()
         # value is a 2-uple (filename, stream)
-        filename, stream = value
+        try:
+            filename, stream = value
+        except ValueError:
+            raise UnmodifiedField()
         # XXX avoid in memory loading of posted files. Requires Binary handling changes...
         value = Binary(stream.read())
         if not value.getvalue(): # usually an unexistant file