Hello, I think this behaviour is absolut normal. When you create on a databasesystem a datefield and make a insert with this field with string '2021-08-21' then databasesystem convert this string automatical into date...
So i think this has nothing to do with python/django and this behaviour i would expect. Regards 1oglop1 <[email protected]> schrieb am So., 29. Aug. 2021, 17:22: > Hello, > I have a problem that DateField or DateTime fields are `str` instead of > datetime objects after the model has been instantiated/created. > > But when the model is returned from the database it is a correct object. > How can I prevent this? > > given: > ``` > class My(models.Model): > > dt_obj = models.DateField("From", auto_now_add=True) > dt_str = models.DateField("From", blank=True, null=True) > ``` > When: > > ``` > o = My.objects.create(dt_str="2020-01-01") > > isinstance(o.dt_str, str) # True > isinstance(o.dt_obj, str) # False - is datetime > ``` > > But after > ``` > o.refresh_from_db() > > isinstance(o.dt_str, str) # False - is datetime > isinstance(o.dt_obj, str) # False - is datetime > ``` > > The conclusion is that with DateField it depends on what type has been > used to create the instance. > But when the object is returned from the database it is deserialized > correctly. > This is bizarre. > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/b2dd238c-704d-4f8b-bff2-8d9a3bedca12n%40googlegroups.com > <https://groups.google.com/d/msgid/django-users/b2dd238c-704d-4f8b-bff2-8d9a3bedca12n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAKGT9mxo4cam5pZto5-fs5i_5kf9oEzLhwCWVsygLh9aznVZWg%40mail.gmail.com.
