#29257: If creation of a db cursor fails, the resulting traceback is misleading
-------------------------------------+-------------------------------------
Reporter: Jerome Leclanche | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 2.0
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 1 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Jacob Walls):
What about something like this? With postgres you can disable server side
cursors and then attempt to use them. I haven't made it as far as to set
up postgres so I can run this test, but if you decide to give it a shot
let me know what you see.
Also I don't know what type of error we are expecting to get back.
{{{
diff --git a/tests/backends/postgresql/test_server_side_cursors.py
b/tests/backends/postgresql/test_server_side_cursors.py
index 0cc3423a9b..1b0e4484a3 100644
--- a/tests/backends/postgresql/test_server_side_cursors.py
+++ b/tests/backends/postgresql/test_server_side_cursors.py
@@ -4,6 +4,7 @@ from collections import namedtuple
from contextlib import contextmanager
from django.db import connection, models
+from django.db.utils import DatabaseError
from django.test import TestCase
from ..models import Person
@@ -87,3 +88,9 @@ class ServerSideCursorsPostgres(TestCase):
with self.override_db_setting(DISABLE_SERVER_SIDE_CURSORS=True):
self.asserNotUsesCursor(Person.objects.iterator())
+
+ def test_close_nonexistent_cursor(self):
+ persons = Person.objects.iterator()
+ with self.override_db_setting(DISABLE_SERVER_SIDE_CURSORS=True):
+ # Attempt to create server-side cursor
+ self.assertRaises(DatabaseError, next(persons))
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/29257#comment:5>
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