#28944: Queryset cannot handle select_for_update and values/values_list at the
same
time
-------------------------------------+-------------------------------------
Reporter: Thierry | Owner: nobody
Bastian |
Type: Bug | Status: new
Component: Database | Version: 2.0
layer (models, ORM) |
Severity: Normal | Keywords:
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
With any of my models, if I do the following:
{{{
model.objects.select_for_update(of=('self',)).values_list('pk')
}}}
I'm getting the following exception:
{{{
Traceback (most recent call last):
File "<console>", line 2, in <module>
File "/usr/local/filewave/python/lib/python3.6/site-
packages/django/db/models/query.py", line 272, in __iter__
self._fetch_all()
File "/usr/local/filewave/python/lib/python3.6/site-
packages/django/db/models/query.py", line 1179, in _fetch_all
self._result_cache = list(self._iterable_class(self))
File "/usr/local/filewave/python/lib/python3.6/site-
packages/django/db/models/query.py", line 139, in __iter__
return compiler.results_iter(tuple_expected=True,
chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)
File "/usr/local/filewave/python/lib/python3.6/site-
packages/django/db/models/sql/compiler.py", line 1014, in results_iter
results = self.execute_sql(MULTI, chunked_fetch=chunked_fetch,
chunk_size=chunk_size)
File "/usr/local/filewave/python/lib/python3.6/site-
packages/django/db/models/sql/compiler.py", line 1050, in execute_sql
sql, params = self.as_sql()
File "/usr/local/filewave/python/lib/python3.6/site-
packages/django/db/models/sql/compiler.py", line 507, in as_sql
of=self.get_select_for_update_of_arguments(),
File "/usr/local/filewave/python/lib/python3.6/site-
packages/django/db/models/sql/compiler.py", line 961, in
get_select_for_update_of_arguments
', '.join(_get_field_choices()),
File "/usr/local/filewave/python/lib/python3.6/site-
packages/django/db/models/sql/compiler.py", line 928, in
_get_field_choices
for klass_info in klass_info.get('related_klass_infos', [])
AttributeError: 'NoneType' object has no attribute 'get'
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/28944>
Django <https://code.djangoproject.com/>
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