I'm using `ModelAdmin.save_model` to set some data from the `request`
object to my instance.
When I change an existing `Magasin` instance from the admin, I get an
`IntegrityError`, eg:
"Duplicate entry '220' for key 'PRIMARY'"
meaning that in Model.save, the instance is created, instead of being
updated.
When I do it programmatically, it works as expected, and the instance is
updated:
m = Magasin()
m.nom="test"
m.region_id=3
m.save()
m.nom="test_modified"
m.save() # no error
What's wrong? Anybody can help?
*models.py*
class Magasin(models.Model):
nom = models.CharField(max_length=200)
region = models.ForeignKey(Region, blank=True, null=True)
def save(self, *args, **kwargs):
if self.region_id is None:
self.region_id = args[0]
super(Magasin, self).save(*args, **kwargs)
*admin.py*
class MagasinAdmin(admin.ModelAdmin):
def save_model(self, request, obj, form, change):
# more stuff
obj.save()
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