I think ORM should have some kind of caching. For example, in docs[1], when
we do:
>>> e = Entry.objects.get(pk=1)
>>> e.blog # Hits database
>>> e.blog # Don't hit database
But let's imagine we have a third model named Author:
class Author(models.Model):
name = models.CharField(max_length=50)
blog = models.OneToOneField(Blog)
When we do:
>>> a = Author.objects.get(pk=1)
>>> b = a.blog # Hit's database
>>> b.author # Hits database again
What do you think in saving the author value in the blog instance if it is
achieved through the author instance? It's something like telling blog who
is his author in the moment you are retrieving it from the author.
The same concept can be used in ForeignKey also. Whe we do:
>>> b = Blog.objects.get(pk=1)
>>> for entry in b.entry_set.all():
... entry.blog # hits database to retrieve the blog in each iteration.
What do you think about it?
--------
Vinícius Mendes
Engenheiro de Computação
Meio Código - A peça que faltava para o seu código!
URL http://www.meiocodigo.com
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