#36847: FileField(upload_to=...) callback no longer sees `auto_add_now` field
----------------------------+-----------------------------------------
Reporter: Ran Benita | Type: Bug
Status: new | Component: Documentation
Version: 6.0 | Severity: Normal
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
----------------------------+-----------------------------------------
In Django 5.2 and before, accessing an `auto_add_now=True` DateTimeField
in the `upload_to` callback of a `FileField` was possible, i.e. the field
was filled with the current time. In Django 6.0, the field value is now
`None` (the field is not `null=True`).
It is not a big problem for me, since I just dropped the usage of
`auto_add_now` (I try to avoid it in new code anyway). But perhaps is can
be helpful to document in the changelog.
The
[https://docs.djangoproject.com/en/6.0/ref/models/fields/#django.db.models.FileField.upload_to
documentation of `upload_to`] currently states that the PK is not
available, maybe it can mention `auto_add_now` and friends as well.
{{{#!python
from django.db import models
def upload_to_callback(instance, filename):
return str(instance.created.year) # <- Crash, obj.created is None
class MyModel(models.Model):
created = models.DateTimeField(
auto_now_add=True,
)
file = models.FileField(
max_length=9999,
upload_to=upload_to_callback,
)
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/36847>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
--
You received this message because you are subscribed to the Google Groups
"Django updates" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion visit
https://groups.google.com/d/msgid/django-updates/0107019b9421d9a4-e92b905b-6dab-4927-b1ab-16d51c2eef3b-000000%40eu-central-1.amazonses.com.
