I'm stuck at what I think should have been one of the easiest steps of
building my magazines website: the models. :(
I really feel stupid for that, so please tell me the right way to do
this.
This is what I have: Magazines, with many Issues each, and articles,
which belong to only one Magazine, and therefore should only be allowed
to belong to the chosen Magazine's Issues.
myproj/myapp/models.py:
class Magazine(models.Model):
...
name = models.CharField(...)
class Issue(models.Model):
...
magazine = models.ForeignKey(Magazine)
...
class Article(models.Model):
...
magazine = models.ForeignKey(Magazine)
# Now I want to force the displaying of only the Issues that have
# this same Magazine as their ForeignKey relation.
# This is how I'm trying to do this:
issue = models.ForeignKey(Issue,
limit_choices_to{'magazine__id__eq': magazine.id})
Django tells me that ForeignKey fields have no id attribute. Ok, I knew
that already, but there's *got* to be some way of limiting the choice
of issues to the ones that belong to the same Magazine the user chose.
So, my question here would be:
How can I access the attributes of a ForeignKey "target" when building
my model?
If this is not possible in the model definition steps, then how do I do
this limiting in the Admin page?
Any hint would be great.
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