[Django] #12885: GenericRelation fails to join the related table from a inherited model

[Django]

#12885: GenericRelation fails to join the related table from a inherited model
-----------------------------+----------------------------------------------
 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'")
 }}}

-- 
Ticket URL: <http://code.djangoproject.com/ticket/12885>
Django <http://code.djangoproject.com/>
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