id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
28512	save() behavior of a parent model class accessed through _ptr attribute	wckao	nobody	"Not sure if this is really a bug, but the behavior is not what I expected.
With model

{{{#!python
from django.db import models

class RelatedModel(models.Model):
    name = models.CharField(max_length=20)

class ModelA(models.Model):
    related = models.ForeignKey(RelatedModel)

    def set_related(self):
        self.related = RelatedModel.objects.get(name=""related_model2"")
        self.save()


class ModelB(ModelA):
    name = models.CharField(max_length=20)

    def set_related(self):
        self.modela_ptr.set_related()
}}}

When running the following script
{{{#!python
r1 = RelatedModel.objects.create(name=""related_model1"")
r2 = RelatedModel.objects.create(name=""related_model2"")

b1 = ModelB.objects.create(related=r1, name=""b1"")   # b1.related.name == ""related_model1""
b1.set_related()                      # b1.related.name should be ""related_model2"" now
print(b1.related.name)          # shows ""related_model1""
}}}

"	Uncategorized	closed	Uncategorized	1.11	Normal	invalid			Unreviewed	0	0	0	0	0	0