Mercurial > public > sg101
comparison gpp/potd/signals.py @ 532:ff67946fd4b0
For #242, move the updating of the POTD sequence into a new signals module.
When photos are deleted from the admin changelist in bulk, the individual
delete() functions on the photo objects is not called. However, the post_delete
signal is called for each object.
| author | Brian Neal <bgneal@gmail.com> |
|---|---|
| date | Sun, 25 Dec 2011 04:15:32 +0000 |
| parents | |
| children |
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| 531:1f92a53db575 | 532:ff67946fd4b0 |
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| 1 """ | |
| 2 Signal handlers for the potd application. | |
| 3 | |
| 4 """ | |
| 5 from django.db.models.signals import post_save, post_delete | |
| 6 | |
| 7 from potd.models import Photo, Sequence | |
| 8 | |
| 9 | |
| 10 def on_photo_save(sender, **kwargs): | |
| 11 """ | |
| 12 This function is executed when a Photo is saved. It inserts the photo into | |
| 13 the current sequence. | |
| 14 | |
| 15 """ | |
| 16 photo = kwargs['instance'] | |
| 17 Sequence.objects.insert_photo(photo.pk) | |
| 18 | |
| 19 | |
| 20 def on_photo_delete(sender, **kwargs): | |
| 21 """ | |
| 22 This function is executed when a Photo is deleted. It removes the photo from | |
| 23 the current sequence of photos. | |
| 24 | |
| 25 """ | |
| 26 photo = kwargs['instance'] | |
| 27 Sequence.objects.remove_photo(photo.pk) | |
| 28 | |
| 29 | |
| 30 post_save.connect(on_photo_save, sender=Photo, dispatch_uid='potd.signals') | |
| 31 post_delete.connect(on_photo_delete, sender=Photo, dispatch_uid='potd.signals') |