Hi there,
Say I have:
class TaggedItem(models.Model):
"""A tag on an item."""
tag = models.SlugField()
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()
content_object = models.GenericForeignKey()
class Meta:
ordering = ["tag"]
def __str__(self):
return self.tag
class Book(models.Model):
writer = models.ForeignKey(User)
tags = models.GenericRelation(TaggedItem)
How do I get all Tags for books by Dostoevsky ? :-)
TaggedItem.objects.filter(content_type=ContentType.objects.get_for_model(Book),
content_object__writer="Dostoevsky")
...doesn't work... And
TaggedItem.objects.filter(content_type=ContentType.objects.get_for_model(Book),
object_id__in=[ book.id for book in
Book.objects.filter(writer="Dostoevsky")])
is pretty bad.
Should I be looking at extra( ) or is there a smarter way to go about this?
- bram
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