Channels 3 Daphne Uvicorn Error AppRegistryNotReady

Django 在使用 Channels 3 时,使用 Daphne 或者 Uvicorn 启动会出现 AppRegistryNotReady 错误

这个主要的原因是在项目启动前未初始化,我尝试自行解决了一下

如果你的 asgi.py 是如下形式

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"""
ASGI config for homados project.

It exposes the ASGI callable as a module-level variable named ``application``.

For more information on this file, see
https://docs.djangoproject.com/en/3.1/howto/deployment/asgi/
"""

import os

from channels.routing import ProtocolTypeRouter
from django.core.asgi import get_asgi_application
from homados.middleware.wsmw import QueryXTokenAuthMiddleware
from channels.routing import ProtocolTypeRouter, URLRouter
import apps.duplex.routing
import apps.synergy.routing

os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'homados.settings.dev_micro')

application = ProtocolTypeRouter({
"http": get_asgi_application(),
# Just HTTP for now. (We can add other protocols later.)
'websocket': QueryXTokenAuthMiddleware(
URLRouter(
apps.duplex.routing.websocket_urlpatterns +
apps.synergy.routing.websocket_urlpatterns
)
),
})

那么应该是会报另外一个错误,在项目设置 DJANGO_SETTINGS_MODULE 前调用settings,这个错误只需要把设置环境变量前提即可

但是前提后还是会有 AppRegistryNotReady 的错误,这个错误查询了一下,这个Issue 已经提出了解决方案,原因是因为django还未初始化时调用了channels路由注册,可以通过下面形式的代码来解决

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"""
ASGI config for homados project.

It exposes the ASGI callable as a module-level variable named ``application``.

For more information on this file, see
https://docs.djangoproject.com/en/3.1/howto/deployment/asgi/
"""

import os

from channels.routing import ProtocolTypeRouter
from django.core.asgi import get_asgi_application
from channels.routing import ProtocolTypeRouter, URLRouter


os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'homados.settings.dev_micro')

django_asgi_app = get_asgi_application()


from homados.middleware.wsmw import QueryXTokenAuthMiddleware
import apps.duplex.routing
import apps.synergy.routing

application = ProtocolTypeRouter({
"http": django_asgi_app,
# Just HTTP for now. (We can add other protocols later.)
'websocket': QueryXTokenAuthMiddleware(
URLRouter(
# msf 执行结果推送
apps.duplex.routing.websocket_urlpatterns +
# 聊天室
apps.synergy.routing.websocket_urlpatterns
)
),
})

Channels 3 Daphne Uvicorn Error AppRegistryNotReady

http://hacktech.cn/2020/12/03/channels_daphne_uvicorn_error.html

Author

Akkuman

Posted on

2020-12-03

Updated on

2021-07-20

Licensed under

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