#26060: Regression in reverse one-to-one field when in readonly_fields
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Reporter: damycra | Owner: nobody
Type: Bug | Status: new
Component: contrib.admin | Version: 1.8
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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When upgrading from 1.7 to 1.8(.8) I started encountering errors in the
admin with a reverse one to one relationship when it was in
readonly_fields. I assume this is a regression. Naturally, I am happy to
help fix it (if it is not by design), given a steer!
Tested with Python 2.7.10, the project template was created with Django
1.8.8.
cd /tmp
git clone https://github.com/damycra/django-readonly-onetoone.git
cd django-readonly-onetoone/
mkvirtualenv dj_onetoone
# make sure virtualenv is activated, then:
pip install -r requirements.txt
./manage.py migrate
./manage.py createsuperuser
./manage.py runserver
# open http://127.0.0.1:8000/admin/simple/a/add/
# create an A object
# create a B object referencing the A
http://127.0.0.1:8000/admin/simple/b/add
# return to original A object http://127.0.0.1:8000/admin/simple/a/1/
# now upgrade to Django 1.8.8
pip install Django==1.8.8
./manage.py migrate
./manage.py runserver
# return to http://127.0.0.1:8000/admin/simple/a/1/
''' AttributeError at /admin/simple/a/1/
OneToOneRel object has no attribute 'rel''''
# now upgrade to Django 1.9.1
pip install Django==1.9.1
./manage.py migrate
./manage.py runserver
# go to http://127.0.0.1:8000/admin/simple/a/1/change/
''' AttributeError at /admin/simple/a/1/change/
'OneToOneRel' object has no attribute 'flatchoices''''
A simple workaround is to use a method on ModelAdmin
{{{
class WorkingAAdmin(admin.ModelAdmin):
readonly_fields = ['working_b']
def working_b(self, instance):
return instance.b
working_b.short_description = 'working'
}}}
See also [https://code.djangoproject.com/ticket/24851#comment:8
https://code.djangoproject.com/ticket/24851#comment:8]
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Ticket URL: <https://code.djangoproject.com/ticket/26060>
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