python - django.db.utils.InterfaceError: 更新到 Django 3.0 时连接已关闭失败

问题描述

我正在将一个中型项目更新到 Django 3.0，并且在我的测试中遇到了几个错误，只是将 Django 版本从 2.3 升级。

整个测试套件多年来一直正常运行，我在更改日志中找不到任何可能指向此问题原因的相关更改。显然，单个测试失败会触发同一 TestCase 类中的所有剩余测试失败，但有以下异常：

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

我对这里可能发生的事情一无所知。

标签： pythondjangopsycopg2

python - django.db.utils.InterfaceError: 更新到 Django 3.0 时连接已关闭失败

问题描述

解决方案

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