如何解决这个 django-private-chat 错误？

Posted 2023-02-16

【中文标题】如何解决这个 django-private-chat 错误？

【英文标题】：How do I solve this django-private-chat error?

【发布时间】：2020-04-25 10:58:21

【问题描述】：

所以我一直在尝试将 django-private-chat 实施到现有问题中，但总是遇到错误。因此，我尝试运行在 Github 上的 django-private-chat 下找到的示例项目，我收到了同样的错误。感谢您的帮助！

    25.04.20 10:45:49:ERROR:Error in connection handler
Traceback (most recent call last):
  File "/opt/anaconda3/envs/testEnv/lib/python3.7/site-packages/websockets/server.py", line 191, in handler
    await self.ws_handler(self, path)
  File "/opt/anaconda3/envs/testEnv/lib/python3.7/site-packages/django_private_chat/handlers.py", line 259, in main_handler
    user_owner = get_user_from_session(session_id)
  File "/opt/anaconda3/envs/testEnv/lib/python3.7/site-packages/django_private_chat/utils.py", line 15, in get_user_from_session
    session = Session.objects.get(session_key=session_key)
  File "/opt/anaconda3/envs/testEnv/lib/python3.7/site-packages/django/db/models/manager.py", line 82, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/opt/anaconda3/envs/testEnv/lib/python3.7/site-packages/django/db/models/query.py", line 411, in get
    num = len(clone)
  File "/opt/anaconda3/envs/testEnv/lib/python3.7/site-packages/django/db/models/query.py", line 258, in __len__
    self._fetch_all()
  File "/opt/anaconda3/envs/testEnv/lib/python3.7/site-packages/django/db/models/query.py", line 1261, in _fetch_all
    self._result_cache = list(self._iterable_class(self))
  File "/opt/anaconda3/envs/testEnv/lib/python3.7/site-packages/django/db/models/query.py", line 57, in __iter__
    results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size)
  File "/opt/anaconda3/envs/testEnv/lib/python3.7/site-packages/django/db/models/sql/compiler.py", line 1142, in execute_sql
    cursor = self.connection.cursor()
  File "/opt/anaconda3/envs/testEnv/lib/python3.7/site-packages/django/utils/asyncio.py", line 24, in inner
    raise SynchronousOnlyOperation(message)
django.core.exceptions.SynchronousOnlyOperation: You cannot call this from an async context - use a thread or sync_to_async.
25.04.20 10:45:49:DEBUG:server ! failing OPEN WebSocket connection with code 1011
25.04.20 10:45:49:DEBUG:server - state = CLOSING
25.04.20 10:45:49:DEBUG:server > Frame(fin=True, opcode=8, data=b'\x03\xf3', rsv1=False, rsv2=False, rsv3=False)
25.04.20 10:45:49:DEBUG:server x half-closing TCP connection
25.04.20 10:45:49:DEBUG:server - event = connection_lost(None)
25.04.20 10:45:49:DEBUG:server - state = CLOSED
25.04.20 10:45:49:DEBUG:server x code = 1006, reason = [no reason]

【问题讨论】：

显示您的代码。

因为我自己的项目和在 github 上找到的示例都遇到了这个问题，所以这里是示例链接，因为它是不太复杂的项目：link to github

这看起来像 django_private_chat 中的一个错误，可能他们不完全支持 django3+（这就是引发此错误的原因）。

已经8天了，你解决了这个问题吗？

【参考方案1】：

在 Django 3 之后不支持 Django 私人聊天。尝试在您的 settings.py 文件中输入此内容

os.environ["DJANGO_ALLOW_ASYNC_UNSAFE"] = "true"

【参考方案2】：

Django Private Chat2 最高支持 django 4