#7823: ForeignKey get_db_prep_lookup doesn't work for custom primary key
------------------------------+---------------------------------------------
Reporter: isagalaev | Owner: mtredinnick
Status: new | Milestone:
Component: Database wrapper | Version: SVN
Keywords: | Stage: Unreviewed
Has_patch: 0 |
------------------------------+---------------------------------------------
If a parent model has a user-defined field as a primary key:
{{{
class Parent(models.Model):
user_id = CutomUserField(primary_key=True)
class Child(models.Model):
parent = models.ForeignKey(Parent)
}}}
then this query will fail:
{{{
p = Parent(...)
Child.objects.filter(parent=p)
}}}
This happens because get_db_prep_lookup doesn't get called on p.user_id
and its value (which is a custom user class) gets passed as an sql
parameter into db.
Patch follows.
P.S. A bug is very practical: we have custom non-model user objects
instead of contrib.auth.models.User and can't reference them from models
with custom UserField because many queries using those models would break.
--
Ticket URL: <http://code.djangoproject.com/ticket/7823>
Django Code <http://code.djangoproject.com/>
The web framework for perfectionists with deadlines
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django updates" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/django-updates?hl=en
-~----------~----~----~----~------~----~------~--~---
