Opened 8 years ago

Last modified 8 years ago

#28787 closed Bug

MySQL Update fails — at Initial Version

Reported by: Paulo Owned by: nobody
Component: Database layer (models, ORM) Version: 1.11
Severity: Normal Keywords:
Cc: Mariusz Felisiak Triage Stage: Accepted
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description

Given the models below:

class House(models.Model):
    name = models.CharField(max_length=200)

class Room(models.Model):
    name = models.CharField(max_length=200)
    house = models.ForeignKey(House, on_delete=models.CASCADE)

The following query fails:

houses_with_suites = House.objects.filter(room__name__icontains='suite')
Room.objects.filter(house__in=houses_with_suites).update(name='suite')

With this error:

OperationalError: (1093, "You can't specify target table 'mysql_test_room' for update in FROM clause")

I think this has been around for a while (https://code.djangoproject.com/ticket/20300).

Change History (0)

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