Fixed #1729 -- Changed get_FIELD_filename() to return an empty string when field fiel's value is null. Thanks, rhettg@gmail.com

git-svn-id: http://code.djangoproject.com/svn/django/trunk@2839 bcc190cf-cafb-0310-a4f2-bffc1f526a37

AUTHORS

@@ -97,6 +97,7 @@ answer newbie questions, and generally made Django that much better:
     Daniel Poelzleithner <http://poelzi.org/>
     J. Rademaker
     Brian Ray <http://brianray.chipy.org/>
+    rhettg@gmail.com
     Oliver Rutherfurd <http://rutherfurd.net/>
     Ivan Sagalaev (Maniac) <http://www.softwaremaniacs.org/>
     David Schein

django/db/models/base.py

@@ -281,7 +281,9 @@ class Model(object):
         return getattr(self, cachename)
 
     def _get_FIELD_filename(self, field):
+        if getattr(self, field.attname): # value is not blank
             return os.path.join(settings.MEDIA_ROOT, getattr(self, field.attname))
+        return ''
 
     def _get_FIELD_url(self, field):
         if getattr(self, field.attname): # value is not blank