# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1342383020 -7200
# Node ID ceab20195fe53e6eee1ac1c58590ba475ccae351
# Parent  938ae4097683f432d02b3ed0bba5b964cb4b50ae
Fixed error handling where no suitable content types are available.

diff -r 938ae4097683 -r ceab20195fe5 actions/SharedUpdate.py
--- a/actions/SharedUpdate.py	Sun Jul 15 21:33:24 2012 +0200
+++ b/actions/SharedUpdate.py	Sun Jul 15 22:10:20 2012 +0200
@@ -136,12 +136,14 @@
         # Perform content negotiation if no mimetype was specified.
 
         if mimetype is None:
-            mimetype = getPreferredOutputTypes(request, mimetypes)[0]
+            mimetypes = getPreferredOutputTypes(request, mimetypes)
+            if mimetypes:
+                mimetype = mimetypes[0]
 
         # Where no suitable mimetype is found, break out of the loop and return
         # an error.
 
-        elif mimetype not in mimetypes:
+        if not mimetypes or mimetype not in mimetypes:
             status = "406 Not Acceptable"
             break