alekosot / django-groundworks Goto Github PK
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License: Other
Utilities for django projects
License: Other
Hello. Congrats for the package!
I wanted to update my project from Django 2.2.x to 3.0.x. However, the following error occurred:
File "/django_app/src/django-groundworks/groundworks/models.py", line 7, in <module> from django.utils import six, timezone ImportError: cannot import name 'six'
Per here, django removed django.utils.six since from version >3. (python 2 was totally removed even from compatibility APIs)
six is imported and used in groundworks/models.py in WithEnforcedValues Model.
Hello!
Django version 2.2.1 used.
When a model instance is created, date_created
, date_updated
are correctly set to timezone.now().
However, when this instance is updated, date_updated
is not updating.
I think this is expected since the column in TimeStamped Model is:
date_updated = models.DateTimeField( _('date updated'), default=timezone.now)
which dictates a default value when there is none. So, when there is a value already, there will be no update.
What I had done to fix the issue was to create a custom Timestamped Model with the columns below:
date_created = models.DateTimeField(_('date_created'), default=timezone.now)
date_updated = models.DateTimeField(_('date_updated'), auto_now=True)
One thing to take into consideration is that I used default=timezone.now
, in order to be able to override the date_created
if needed. If you want the date_created
value to be irreversible, then you should use auto_now_add=True
, where the default value cannot be overridden (same goes with auto_now=True
).
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