Mercurial > public > sg101
comparison forums/signals.py @ 581:ee87ea74d46b
For Django 1.4, rearranged project structure for new manage.py.
| author | Brian Neal <bgneal@gmail.com> |
|---|---|
| date | Sat, 05 May 2012 17:10:48 -0500 |
| parents | gpp/forums/signals.py@82b97697312e |
| children | 5902dc5e58a3 |
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| 580:c525f3e0b5d0 | 581:ee87ea74d46b |
|---|---|
| 1 """ | |
| 2 Signal handlers & signals for the forums application. | |
| 3 | |
| 4 """ | |
| 5 from django.db.models.signals import post_save | |
| 6 from django.db.models.signals import post_delete | |
| 7 import django.dispatch | |
| 8 | |
| 9 from forums.models import Forum, Topic, Post | |
| 10 | |
| 11 | |
| 12 def on_topic_save(sender, **kwargs): | |
| 13 if kwargs['created']: | |
| 14 topic = kwargs['instance'] | |
| 15 topic.forum.topic_count_update() | |
| 16 topic.forum.save() | |
| 17 | |
| 18 | |
| 19 def on_topic_delete(sender, **kwargs): | |
| 20 topic = kwargs['instance'] | |
| 21 topic.forum.topic_count_update() | |
| 22 topic.forum.save() | |
| 23 forums.latest.notify_topic_delete(topic) | |
| 24 | |
| 25 | |
| 26 def on_post_save(sender, **kwargs): | |
| 27 if kwargs['created']: | |
| 28 post = kwargs['instance'] | |
| 29 | |
| 30 # update the topic | |
| 31 post.topic.post_count_update() | |
| 32 post.topic.save() | |
| 33 | |
| 34 # update the forum | |
| 35 post.topic.forum.post_count_update() | |
| 36 post.topic.forum.save() | |
| 37 | |
| 38 | |
| 39 def on_post_delete(sender, **kwargs): | |
| 40 post = kwargs['instance'] | |
| 41 | |
| 42 # update the topic | |
| 43 try: | |
| 44 post.topic.post_count_update() | |
| 45 post.topic.save() | |
| 46 except Topic.DoesNotExist: | |
| 47 pass | |
| 48 else: | |
| 49 # update the forum | |
| 50 try: | |
| 51 post.topic.forum.post_count_update() | |
| 52 post.topic.forum.save() | |
| 53 except Forum.DoesNotExist: | |
| 54 pass | |
| 55 | |
| 56 | |
| 57 post_save.connect(on_topic_save, sender=Topic, dispatch_uid='forums.signals') | |
| 58 post_delete.connect(on_topic_delete, sender=Topic, dispatch_uid='forums.signals') | |
| 59 | |
| 60 post_save.connect(on_post_save, sender=Post, dispatch_uid='forums.signals') | |
| 61 post_delete.connect(on_post_delete, sender=Post, dispatch_uid='forums.signals') | |
| 62 | |
| 63 | |
| 64 # Signals for the forums application. | |
| 65 # | |
| 66 # This signal is sent when a topic has had its textual content (title) changed. | |
| 67 # The provided arguments are: | |
| 68 # sender - the topic model instance | |
| 69 # created - True if the topic is new, False if updated | |
| 70 | |
| 71 topic_content_update = django.dispatch.Signal(providing_args=['created']) | |
| 72 | |
| 73 # This signal is sent when a post has had its textual content (body) changed. | |
| 74 # The provided arguments are: | |
| 75 # sender - the post model instance | |
| 76 # created - True if the post is new, False if updated | |
| 77 | |
| 78 post_content_update = django.dispatch.Signal(providing_args=['created']) | |
| 79 | |
| 80 | |
| 81 def notify_new_topic(topic): | |
| 82 """ | |
| 83 Sends the topic_content_update signal for a new topic instance. | |
| 84 | |
| 85 """ | |
| 86 topic_content_update.send_robust(topic, created=True) | |
| 87 | |
| 88 | |
| 89 def notify_updated_topic(topic): | |
| 90 """ | |
| 91 Sends the topic_content_update signal for an updated topic instance. | |
| 92 | |
| 93 """ | |
| 94 topic_content_update.send_robust(topic, created=False) | |
| 95 | |
| 96 | |
| 97 def notify_new_post(post): | |
| 98 """ | |
| 99 Sends the post_content_update signal for a new post instance. | |
| 100 | |
| 101 """ | |
| 102 post_content_update.send_robust(post, created=True) | |
| 103 | |
| 104 | |
| 105 def notify_updated_post(post): | |
| 106 """ | |
| 107 Sends the post_content_update signal for an updated post instance. | |
| 108 | |
| 109 """ | |
| 110 post_content_update.send_robust(post, created=False) | |
| 111 | |
| 112 | |
| 113 # Avoid circular imports | |
| 114 import forums.latest |