Hi,
I've read several descriptions (on the website and the mailinglist) on
how inheritance once worked, works now, should work, or does not work,
and I'm confused...
I have an abstract base class called File:
class File(models.Model):
user = models.ForeignKey(User)
file = models.FileField(upload_to="uploads/")
class Meta:
abstract = True
I want to have several classes that inherit from it, for example:
class BitmapImageFile(File):
width = models.IntegerField()
height = models.IntegerField()
class PdfFile(File):
num_pages = models.IntegerField()
Now, I'd like to access all the file objects. Ideally, I would write
File.objects.all()
but File does not have an objects property.
Is there a way to do this that will not kill my database performance?
Maybe an abstract base is the wrong idea...
Any help is appreciated!
-Stephan Walter
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