Opened 7 years ago

Closed 7 years ago

#29567 closed Bug (duplicate)

It raise FieldError when the F() function uses a forign key field.

Reported by: HongWeipeng Owned by: nobody
Component: Uncategorized Version: 2.0
Severity: Normal Keywords:
Cc: Triage Stage: Unreviewed
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description (last modified by HongWeipeng) 

class B(models.Model):
    name = models.CharField(max_length=10)

class A(models.Model):
    name = models.CharField(max_length=10)
    b = models.ForeignKey('B', on_delete=models.CASCADE)

And then:

A.objects.all().update(name=F('b__name'))

raise FieldError("Joined field references are not permitted in this query")
django.core.exceptions.FieldError: Joined field references are not permitted in this query

Change History (2)

comment:1 by HongWeipeng, 7 years ago

Description: modified (diff)

comment:2 by Dan Collins, 7 years ago

Resolution: → duplicate
Status: new → closed

Duplicate of (wontfix) #14104, see also ​https://docs.djangoproject.com/en/dev/topics/db/queries/#updating-multiple-objects-at-once

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