Slot updates

gracedb/api.py

@@ -815,6 +815,10 @@ class EventSlot(APIView):
             return Response("Event does not exist.",
                     status=status.HTTP_404_NOT_FOUND)
 
+        if not slotname:
+            return Response(dict([(s.name, s.value)
+                for s in Slot.objects.filter(event=event)]))
+
         try:
             slot = Slot.objects.filter(event=event).filter(name=slotname)[0]
         except:

gracedb/models.py

@@ -243,6 +243,8 @@ class MultiBurstEvent(Event):
 class Slot(models.Model):
     """Slot Model"""
     # Does the slot need to have a submitter column?
+    class Meta:
+        unique_together = (('event', 'name'))
     event = models.ForeignKey(Event)
     name  = models.CharField(max_length=100)
     value = models.CharField(max_length=100)