Hi,
You'ew hitting limitation of Django ORM which prohibits overriding fields.
https://docs.djangoproject.com/en/1.3/topics/db/models/#field-name-hiding-is-not-permitted
4.4.2012 6:34, shiva kirjoitti:
Hello!
In our apps (that use Django 1.2.7) we use following models:
class BaseRegistration(models.Model):
exhibition = models.ForeignKey(...)
year = models.IntegerField(...)
user = models.ForeignKey('auth.User')
class BarcodeRegistration(BaseRegistration):
class Meta:
abstract = True
class EventRegistration(BarcodeRegistration):
event = models.ForeignKey(...)
I append *validate_unique* by *user* and *event* fields in
EventRegistration class:
class EventRegistration(BarcodeRegistration):
event = models.ForeignKey(...)
user = models.ForeignKey('auth.User')
class Meta:
unique_together = ('event', 'user')
But in django command manage.py validate fails with error:
exhibition.eventregistration: "unique_together" refers to user. This
is not in the same model as the unique_together statement.
After some "pdb'ing" of django.core.management.validation,
django.db.models.base, and django.db.models.options I found, that is
happend because:
In [13]: EventRegistration._meta.get_field('user') in
EventRegistration._meta.parents.keys()[0]._meta.local_fields
Out[13]: True
In [14]: EventRegistration._meta.get_field('user') in
EventRegistration._meta.local_fields
Out[14]: False
Is it's something wrong with our code?
Thanks
--
Shavrin Ivan
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