Opened 8 years ago
Last modified 8 years ago
#27186 closed Bug
Cannot change DateTimeField with default via Admin since Django 1.10.1 — at Initial Version
| Reported by: | Michael Käufl | Owned by: | nobody |
|---|---|---|---|
| Component: | Forms | Version: | 1.10 |
| Severity: | Release blocker | Keywords: | |
| Cc: | Triage Stage: | Accepted | |
| Has patch: | yes | Needs documentation: | no |
| Needs tests: | no | Patch needs improvement: | no |
| Easy pickings: | no | UI/UX: | no |
Description
Since Django 1.10.1 (it worked in 1.10.0), it is not possible to change the value of a DateTimeField in the admin if the field has a default.
Changing the value and saving the object results in the old value still being in the database.
How to reproduce
I created a small example project to easily reproduce the problem.
It has a model ''Dummy'' with two DateTimeFields. One with and one without a default (django.utils.timezone.now). The admin is the default django.contrib.admin.ModelAdmin.
git clone https://github.com/michael-k/datetimefieldbroken.git && cd datetimefieldbroken docker-compose build --pull docker-compose run web migrate docker-compose run web createsuperuser docker-compose up -d
Head your browser to http://localhost:8023/admin/main/dummy/add/, login and create a new Dummy using Save and continue editing. Change the values all for input fields and press Save and continue editing again. The values of Dt with default are unchanged.
Patch that introduced the issue
We belive that PR 7195 (redaring issue 27039) introduced the problem, but did not validate this. Supposedly this happens because DateTimeField is split into two fields (date + time) in the admin.
We tried it however with Django 1.10.0 and it works just fine.