#7623: Multi-table inheritance does not allow linking new instance of child
model
to existing parent model instance.
-------------------------------------+-------------------------------------
Reporter: brooks.travis@… | Owner: nobody
Type: Bug | Status: reopened
Component: Database layer | Version: SVN
(models, ORM) | Resolution:
Severity: Normal | Triage Stage: Design
Keywords: model-inheritance, | decision needed
multi-table-inheritance | Needs documentation: 1
Has patch: 1 | Patch needs improvement: 1
Needs tests: 1 | UI/UX: 0
Easy pickings: 0 |
-------------------------------------+-------------------------------------
Changes (by Nan):
* status: closed => reopened
* resolution: needsinfo =>
Comment:
Here's a more reasonable example...
{{{
# models.py
class Place(models.Model):
name = models.CharField(max_length=50)
address = models.CharField(max_length=80)
class Restaurant(Place):
place = models.OneToOneField(Place, parent_link=True,
related_name='restaurant')
serves_hot_dogs = models.BooleanField()
serves_pizza = models.BooleanField()
}}}
Now, say we have a bunch of Place objects in the database, and a form
where users can inform us what sort of business a particular Place is (OK,
this is a contrived example, but I'm sure you can see that this could be a
reasonable use case for some types of data).
{{{
# somewhere in views.py
p = Place.objects.get(pk=1)
restaurant = Restaurant(**{
'place': p,
'serves_hot_dogs': False,
'serves_pizza': True,
})
restaurant.save()
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/7623#comment:13>
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