django/daphne
1
1
Fork 0
mirror of https://github.com/django/daphne.git synced 2025-07-11 08:22:17 +03:00
Code Issues Packages Projects Releases Wiki Activity

Add select_for_update() to improve isolation

Browse Source
This commit is contained in:
Andrew Godwin 2016-04-05 22:18:54 -07:00
parent 732167282b
commit 4504eb6ec9
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
channels/database_layer.py
View File

@ -60,7 +60,7 @@ class DatabaseChannelLayer(object):
while True: while True:
try: try:
with transaction.atomic(): with transaction.atomic():
message = self.channel_model.objects.filter(channel__in=channels).order_by("id").first() message = self.channel_model.objects.select_for_update().filter(channel__in=channels).order_by("id").first()
if message: if message:
self.channel_model.objects.filter(pk=message.pk).delete() self.channel_model.objects.filter(pk=message.pk).delete()
return message.channel, self.deserialize(message.content) return message.channel, self.deserialize(message.content)