简单的 django 频道应用程序未与 daphne 一起运行

问题描述

我试图让 django 频道与 daphne 一起运行，但我总是以这个结束

x8/backback/mysite » daphne mysite.asgi:application                                                                                 1 ↵
Traceback (most recent call last):
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/bin/daphne",line 8,in <module>
    sys.exit(CommandLineInterface.entrypoint())
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/daphne/cli.py",line 170,in entrypoint
    cls().run(sys.argv[1:])
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/daphne/cli.py",line 232,in run
    application = import_by_path(args.application)
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/daphne/utils.py",line 12,in import_by_path
    target = importlib.import_module(module_path)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/importlib/__init__.py",line 127,in import_module
    return _bootstrap._gcd_import(name[level:],package,level)
  File "<frozen importlib._bootstrap>",line 1014,in _gcd_import
  File "<frozen importlib._bootstrap>",line 991,in _find_and_load
  File "<frozen importlib._bootstrap>",line 975,in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>",line 671,in _load_unlocked
  File "<frozen importlib._bootstrap_external>",line 783,in exec_module
  File "<frozen importlib._bootstrap>",line 219,in _call_with_frames_removed
  File "./mysite/asgi.py",line 11,in <module>
    from channels.auth import AuthMiddlewareStack
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/channels/auth.py",in <module>
    from django.contrib.auth.models import AnonymousUser
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/django/contrib/auth/models.py",line 2,in <module>
    from django.contrib.auth.base_user import AbstractBaseUser,BaseUserManager
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/django/contrib/auth/base_user.py",line 48,in <module>
    class AbstractBaseUser(models.Model):
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/django/db/models/base.py",line 108,in __new__
    app_config = apps.get_containing_app_config(module)
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/django/apps/registry.py",line 253,in get_containing_app_config
    self.check_apps_ready()
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/django/apps/registry.py",line 135,in check_apps_ready
    settings.INSTALLED_APPS
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/django/conf/__init__.py",line 82,in __getattr__
    self._setup(name)
  File "/Users/me/.local/share/virtualenvs/backback-jdouan2y/lib/python3.8/site-packages/django/conf/__init__.py",line 63,in _setup
    raise ImproperlyConfigured(
django.core.exceptions.ImproperlyConfigured: Requested setting INSTALLED_APPS,but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

我有

Django==3.1.7

达芙妮==3.0.1

频道==3.0.3

我从他们的网站 https://channels.readthedocs.io/en/stable/tutorial/part_1.html

成功完成了频道设置

但是当我尝试一个简单的时，它最终不适用于达芙妮：

daphne mysite.asgi:application

或

daphne -p 8001 mysite.asgi:application

这是我当前的 asgi.py

import os
import django
from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter,URLRouter
from django.core.asgi import get_asgi_application
import chat.routing

os.environ.setdefault("DJANGO_SETTINGS_MODULE","mysite.settings")
django.setup()
application = ProtocolTypeRouter({
  "http": get_asgi_application(),"websocket": AuthMiddlewareStack(
        URLRouter(
            chat.routing.websocket_urlpatterns
        )
    ),})

在 runserver 之前我也尝试过：

export DJANGO_SETTINGS_MODULE=mysite.settings

在做频道教程时，他们要求我们确保频道层可以与 Redis 通信（教程的第 2 部分）

$ python3 manage.py shell
>>> import channels.layers
>>> channel_layer = channels.layers.get_channel_layer()
>>> from asgiref.sync import async_to_sync
>>> async_to_sync(channel_layer.send)('test_channel',{'type': 'hello'})
>>> async_to_sync(channel_layer.receive)('test_channel')
{'type': 'hello'}

如果我直接使用 python3 shell 而不是 python3 manage.py shell，我会遇到与现在尝试运行 daphne 时遇到的类似错误。我想可能有联系，但我不知道在哪里以及为什么。我已经花了几天的时间，做和重做，请帮忙~

解决方法

是的，在你的 asgi.py 中，你必须在你之前移动以下代码 “从channels.auth 导入AuthMiddlewareStack”：

os.environ.setdefault('DJANGO_SETTINGS_MODULE','****.settings')
django.setup()

看图 https://imgur.com/a/ejBW3VZ

channels daphne django django server server