Asked By – grep
Is it possible to refresh the state of a django object from database? I mean behavior roughly equivalent to:
new_self = self.__class__.objects.get(pk=self.pk) for each field of the record: setattr(self, field, getattr(new_self, field))
UPDATE: Found a reopen/wontfix war in the tracker: http://code.djangoproject.com/ticket/901.
Still don’t understand why the maintainers don’t like this.
Now we will see solution for issue: Reload django object from database
As of Django 1.8 refreshing objects is built in. Link to docs.
def test_update_result(self): obj = MyModel.objects.create(val=1) MyModel.objects.filter(pk=obj.pk).update(val=F('val') + 1) # At this point obj.val is still 1, but the value in the database # was updated to 2. The object's updated value needs to be reloaded # from the database. obj.refresh_from_db() self.assertEqual(obj.val, 2)