#24418: refresh_from_db is breaking on null foreign keys
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Reporter: ppp23 | Owner: nobody
Type: Uncategorized | Status: new
Component: Database layer (models, ORM) | Version: 1.8alpha1
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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If i try to call refresh_from_db on a model instance that has a foreignkey
set to null, i get an error:
{{{
Traceback:
File "/home/johannes/formonauts/donation/.env/local/lib/python2.7/site-
packages/django/core/handlers/base.py" in get_response
112. response = wrapped_callback(request,
*callback_args, **callback_kwargs)
File "/home/johannes/formonauts/donation/.env/local/lib/python2.7/site-
packages/django/contrib/admin/options.py" in wrapper
465. return self.admin_site.admin_view(view)(*args,
**kwargs)
File "/home/johannes/formonauts/donation/.env/local/lib/python2.7/site-
packages/django/utils/decorators.py" in _wrapped_view
99. response = view_func(request, *args, **kwargs)
File "/home/johannes/formonauts/donation/.env/local/lib/python2.7/site-
packages/django/views/decorators/cache.py" in _wrapped_view_func
52. response = view_func(request, *args, **kwargs)
File "/home/johannes/formonauts/donation/.env/local/lib/python2.7/site-
packages/django/contrib/admin/sites.py" in inner
198. return view(request, *args, **kwargs)
File "/home/johannes/formonauts/donation/.env/local/lib/python2.7/site-
packages/django/utils/decorators.py" in _wrapper
29. return bound_func(*args, **kwargs)
File "/home/johannes/formonauts/donation/.env/local/lib/python2.7/site-
packages/django/utils/decorators.py" in _wrapped_view
99. response = view_func(request, *args, **kwargs)
File "/home/johannes/formonauts/donation/.env/local/lib/python2.7/site-
packages/django/utils/decorators.py" in bound_func
25. return func(self, *args2, **kwargs2)
File "/home/johannes/formonauts/donation/.env/local/lib/python2.7/site-
packages/django/db/transaction.py" in inner
371. return func(*args, **kwargs)
File "/home/johannes/formonauts/donation/.env/local/lib/python2.7/site-
packages/django/contrib/admin/options.py" in add_view
1164. self.save_model(request, new_object, form, False)
File "/home/johannes/formonauts/donation/server/django-
donut/donut/admin.py" in save_model
36. obj.save()
File "/home/johannes/formonauts/donation/server/django-
donut/nanny/models.py" in save
109. self.refresh_from_db()
File "/home/johannes/formonauts/donation/server/django-
donut/donut/basemodels.py" in refresh_from_db
80. related_val = getattr(rel_instance,
field.related_field.attname)
Exception Type: AttributeError at /admin/nanny/team/add/
Exception Value: 'NoneType' object has no attribute 'id'
}}}
here rel_instance is assigned:
https://github.com/django/django/blob/stable/1.8.x/django/db/models/base.py#L630
if it is None (foreignkey not set, as it is nullable in this model) the
getattr function will complain that it can not get 'id' from 'NoneType'
--
Ticket URL: <https://code.djangoproject.com/ticket/24418>
Django <https://code.djangoproject.com/>
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