#12885: GenericRelation fails to join the related table from a inherited model
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Reporter: semenov | Owner:
Status: new | Milestone:
Component: ORM aggregation | Version: 1.1
Keywords: | Stage: Unreviewed
Has_patch: 0 |
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A minimalistic crashing example is worth thousands words:
{{{
#!python
class Car(models.Model):
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()
object = generic.GenericForeignKey()
class CarDriver(models.Model):
cars = generic.GenericRelation(Car)
class Truck(Car):
pass
class TruckDriver(models.Model):
trucks = generic.GenericRelation(Truck)
# Selecting cars for a car drivers works fine
>>> john = CarDriver.objects.create()
>>> Car.objects.filter(cardriver=john)
[]
# Selecting trucks for a truck driver crashes
>>> pete = TruckDriver.objects.create()
>>> Truck.objects.filter(truckdriver=pete)
# OperationalError: (1054, "Unknown column 'T2.object_id' in 'where
clause'")
}}}
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Ticket URL: <http://code.djangoproject.com/ticket/12885>
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