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annotate gpp/forums/signals.py @ 235:d302c498560e

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Fix problem when deleting multiple topics from a forum in bulk. We getting a list of topics from the database, then deleting each topic. But after you delete a topic, the forum.last_post on the remaining non-deleted topics can be stale. This was causing a weird DoesNotExist. Now just get the topics one at a time from the database.
author Brian Neal <bgneal@gmail.com>
date Thu, 26 Aug 2010 04:01:58 +0000
parents a46788862737
children 3a4bbf9c2cce
rev   line source
bgneal@75 1 """
bgneal@75 2 Signal handlers for the forums application.
bgneal@75 3 """
bgneal@75 4 from django.db.models.signals import post_save
bgneal@75 5 from django.db.models.signals import post_delete
bgneal@181 6
bgneal@181 7 from forums.models import Topic, Post
bgneal@232 8 from forums.views.subscriptions import notify_topic_subscribers
bgneal@75 9
bgneal@75 10
bgneal@75 11 def on_topic_save(sender, **kwargs):
bgneal@75 12 if kwargs['created']:
bgneal@75 13 topic = kwargs['instance']
bgneal@75 14 topic.forum.topic_count_update()
bgneal@75 15 topic.forum.save()
bgneal@75 16
bgneal@75 17
bgneal@75 18 def on_topic_delete(sender, **kwargs):
bgneal@75 19 topic = kwargs['instance']
bgneal@75 20 topic.forum.topic_count_update()
bgneal@75 21 topic.forum.save()
bgneal@75 22
bgneal@75 23
bgneal@75 24 def on_post_save(sender, **kwargs):
bgneal@75 25 if kwargs['created']:
bgneal@75 26 post = kwargs['instance']
bgneal@75 27
bgneal@75 28 # update the topic
bgneal@75 29 post.topic.post_count_update()
bgneal@75 30 post.topic.save()
bgneal@75 31
bgneal@75 32 # update the forum
bgneal@75 33 post.topic.forum.post_count_update()
bgneal@75 34 post.topic.forum.save()
bgneal@75 35
bgneal@181 36 # send out any email notifications
bgneal@181 37 notify_topic_subscribers(post)
bgneal@181 38
bgneal@75 39
bgneal@75 40 def on_post_delete(sender, **kwargs):
bgneal@75 41 post = kwargs['instance']
bgneal@75 42
bgneal@75 43 # update the topic
bgneal@75 44 post.topic.post_count_update()
bgneal@75 45 post.topic.save()
bgneal@75 46
bgneal@75 47 # update the forum
bgneal@75 48 post.topic.forum.post_count_update()
bgneal@75 49 post.topic.forum.save()
bgneal@75 50
bgneal@75 51
bgneal@75 52 post_save.connect(on_topic_save, sender=Topic)
bgneal@75 53 post_delete.connect(on_topic_delete, sender=Topic)
bgneal@75 54
bgneal@75 55 post_save.connect(on_post_save, sender=Post)
bgneal@75 56 post_delete.connect(on_post_delete, sender=Post)