On May 27, 10:03 am, Lee Hinde <[email protected]> wrote:
> Hi;
>
> I have this model design:
>
> http://dpaste.com/hold/199818/
>
> class Weather(models.Model):
> weather_date = models.DateField(auto_now_add=True,db_index=True)
> zip_code = models.CharField(max_length=20,db_index=True )
> icon_data = models.CharField(max_length=80)
>
> class Store(models.Model):
> name = models.CharField(max_length=50,)
> zip_code = models.CharField(max_length=20)
>
> class UserProfile(models.Model):
> store = models.ForeignKey(Store)
> user = models.OneToOneField(User, unique=True)
> role = models.CharField(max_length=80,db_index=True,
> choices=ROLE_CHOICES)
>
> class Note(models.Model):
> created_by = models.ForeignKey(UserProfile,editable=False)
> created = models.DateField(auto_now_add=True)
>
> For a given Note, I'd like to know the weather on the day and at the
> location for the user who created the note. (the weather data is entered via
> a custom management command.)
<snip>
> I can't think of a way to express this in the ORM. This seems like an
> obvious case for "select()", but I haven't had any luck with the various
> combinations of pure select and the new paramater options.
>
> Any help would be appreciated.
>
> - Lee
Does this not work?
note=Note.objects.get(whatever)
weather=Weather.objects.filter(
weather_date=note.created,
zip_code=note.created_by__store__zip_code
)
--
DR.
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