It seems to me there is an inconsistency between clear() and remove
(). After a remove() I find that the related object set no longer
contains the specified object (as expected), and the specified object
also no longer points to the related set (this also is what I'd
expect). However, in the case of clear(), I find that the related
object set is now cleared out (as I'd expect), but the objects that
used to be in the set still point to the set (not what I'd expect).
Is this difference intentional?
I also find that after exiting the shell and then going back in, now
the objects that used to be in the set no longer point to the set.
IE, the inconsistent clear behavior goes away if I exit the django
shell and then re-enter.
class Publisher(models.Model):
name = models.CharField(max_length=100)
class Book(models.Model):
title = models.CharField(max_length=100)
publisher = models.ForeignKey(Publisher, blank=True, null=True)
>>> pub = Publisher.objects.create(name="pub1")
>>> book1 = pub.book_set.create(title="title1")
>>> pub.book_set.all()
[<Book: title1>]
>>> book2 = pub.book_set.create(title="title2")
>>> pub.book_set.all()
[<Book: title1>, <Book: title2>]
>>> book1.publisher
<Publisher: pub1>
>>> book2.publisher
<Publisher: pub1>
# after using remove() to remove book1, book1.publisher is empty
>>> pub.book_set.remove(book1)
>>> book1.publisher
>>> pub.book_set.all()
[<Book: title2>]
# Now book2 references pub. After using clear(), book2.publisher
still references pub
# This seems inconsistent with the remove() behavior above.
>>> pub.book_set.clear()
>>> book2.publisher
<Publisher: pub1>
Any comments from those in-the-know?
Margie
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to
django-users+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
