londiste.handlers.dispatch: Detailed exception if part_field is NULL

Give enough details to locate the event in queue

diff --git a/python/londiste/handlers/dispatch.py b/python/londiste/handlers/dispatch.py
index 95d08e726e0c5f2cf10ed60b0d6fb5ec3fc8c5f9..6505736a204c449ef7d71a60fc8357375b072f43 100644 (file)
--- a/python/londiste/handlers/dispatch.py
+++ b/python/londiste/handlers/dispatch.py
@@ -838,6 +838,8 @@ class Dispatcher(BaseHandler):
             dtm = datetime.datetime.now()
         elif self.conf.part_mode == 'date_field':
             dt_str = data[self.conf.part_field]
+            if dt_str is None:
+                raise Exception('part_field(%s) is NULL: %s' % (self.conf.part_field, ev))
             dtm = datetime.datetime.strptime(dt_str[:19], "%Y-%m-%d %H:%M:%S")
         else:
             raise UsageError('Bad value for part_mode: %s' %\