Ich aktualisiere ein mittelgroßes Projekt auf Django 3.0 und stoße bei meinen Tests auf mehrere Fehler, nachdem ich lediglich die Django-Version von 2.3 gestoßen habe.
Die gesamte Testsuite läuft seit Jahren ordnungsgemäß und ich konnte keine relevante Änderung im Änderungsprotokoll finden, die auf die Ursache dieses Problems hinweisen könnte. Anscheinend löst ein einzelner Testfehler aus, dass jeder verbleibende Test in derselben TestCase-Klasse mit der folgenden Ausnahme fehlschlägt:
Traceback (most recent call last):
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/backends/base/base.py", line 238, in _cursor
return self._prepare_cursor(self.create_cursor(name))
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/utils/asyncio.py", line 24, in inner
return func(*args, **kwargs)
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/backends/postgresql/base.py", line 231, in create_cursor
cursor = self.connection.cursor()
psycopg2.InterfaceError: connection already closed
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/Users/federicobond/code/forks/core/apps/participants/tests/test_views.py", line 40, in setUp
self.client.force_login(self.user)
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/test/client.py", line 602, in force_login
self._login(user, backend)
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/test/client.py", line 611, in _login
if self.session:
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/test/client.py", line 461, in session
session.save()
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/contrib/sessions/backends/db.py", line 81, in save
return self.create()
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/contrib/sessions/backends/db.py", line 51, in create
self._session_key = self._get_new_session_key()
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/contrib/sessions/backends/base.py", line 162, in _get_new_session_key
if not self.exists(session_key):
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/contrib/sessions/backends/db.py", line 47, in exists
return self.model.objects.filter(session_key=session_key).exists()
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/models/query.py", line 777, in exists
return self.query.has_results(using=self.db)
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/models/sql/query.py", line 534, in has_results
return compiler.has_results()
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/models/sql/compiler.py", line 1107, in has_results
return bool(self.execute_sql(SINGLE))
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/models/sql/compiler.py", line 1135, in execute_sql
cursor = self.connection.cursor()
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/utils/asyncio.py", line 24, in inner
return func(*args, **kwargs)
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/backends/base/base.py", line 260, in cursor
return self._cursor()
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/backends/base/base.py", line 238, in _cursor
return self._prepare_cursor(self.create_cursor(name))
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/utils.py", line 90, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/backends/base/base.py", line 238, in _cursor
return self._prepare_cursor(self.create_cursor(name))
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/utils/asyncio.py", line 24, in inner
return func(*args, **kwargs)
File "/Users/federicobond/code/forks/core/env/lib/python3.7/site-packages/django/db/backends/postgresql/base.py", line 231, in create_cursor
cursor = self.connection.cursor()
django.db.utils.InterfaceError: connection already closed
Ich habe keine Ahnung, was hier vor sich gehen könnte.
connection already closed
auslösen, wird für alle verbleibenden Tests in der TestCase-Klasse ausgelöst.