'Cannot import ASGI_APPLICATION module while runserver using channels 2

I have followed the channels tutorial but while running these error throw

Version of the packages is channels==2.1.2 Django==2.0.4

what I missed ? in settings.py

INSTALLED_APPS = [
   "channels"
    ....
]

ROOT_URLCONF = 'myapp.urls'
ASGI_APPLICATION = "myapp.routing.application"

added file mayapp/routing.py

from channels.routing import ProtocolTypeRouter 

application = ProtocolTypeRouter({
    # Empty for now (http->django views is added by default)
})

this is the error log

System check identified no issues (0 silenced).
August 01, 2018 - 13:11:42
Django version 2.0.4, using settings 'myapp.local_settings'
Starting ASGI/Channels version 2.1.2 development server at http://127.0.0.1:8080/
Quit the server with CONTROL-C.
Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x7f71ecfb6400>
Traceback (most recent call last):
  File "/home/vkchlt0192/myapp/lib/python3.5/site-packages/channels/routing.py", line 33, in get_default_application
    module = importlib.import_module(path)
  File "/home/vkchlt0192/myapp/lib/python3.5/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 956, in _find_and_load_unlocked
ImportError: No module named 'myapp.routing'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/vkchlt0192/myapp/lib/python3.5/site-packages/django/utils/autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "/home/vkchlt0192/myapp/lib/python3.5/site-packages/channels/management/commands/runserver.py", line 80, in inner_run
    application=self.get_application(options),
  File "/home/vkchlt0192/myapp/lib/python3.5/site-packages/channels/management/commands/runserver.py", line 105, in get_application
    return StaticFilesWrapper(get_default_application())
  File "/home/vkchlt0192/myapp/lib/python3.5/site-packages/channels/routing.py", line 35, in get_default_application
    raise ImproperlyConfigured("Cannot import ASGI_APPLICATION module %r" % path)
django.core.exceptions.ImproperlyConfigured: Cannot import ASGI_APPLICATION module 'myapp.routing'

Solution 1:^[1]

In my case it was wrong import in different file.

What you should do is

python manage.py shell
from mysite.routing import application

Look what exact error it produces and try to fix that

Solution 2:^[2]

Just change

ASGI_APPLICATION = mysite.routing.application

ASGI_APPLICATION = "routing.application"

Solution 3:^[3]

Check for any potential errors (maybe import error) in consumers.py. Also, try to put channels as the first item in INSTALLED_APPS in settings.py.

As stated in channels document:

The Channels development server will conflict with any other third-party apps that require an overloaded or replacement runserver command. An example of such a conflict is with whitenoise.runserver_nostatic from whitenoise. In order to solve such issues, try moving channels to the top of your INSTALLED_APPS or remove the offending app altogether.

Solution 4:^[4]

This helped me: Everything with ASGI_APPLICATION was fine (thanks to all the previous answers given here). But I read logs a bit further and it appeared, there was an import error somewhere else:

ImportError: cannot import name 'channel_session_user_from_http' from 'channels.auth'

Once I got rid of it, everything came back on track.

Solution 5:^[5]

You need to put your routing.py file inside mayapp/mayapp/routing.py instead of mayapp/routing.py

Solution 6:^[6]

In case anybody comes along this. Remember: ASGI_APPLICATION = "myapp.routing.application" should go at the bottom of settings.py to ensure nothing get snagged in production!

mysite/myapp/routing.py

from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter, URLRouter
import myapp.routing

application = ProtocolTypeRouter({
    # (http->django views is added by default)
    'websocket': AuthMiddlewareStack(
        URLRouter(
            myapp.routing.websocket_urlpatterns
        )
    ),
})

myapp/routing.py

from django.urls import path
from . import consumers

websocket_urlpatterns = [
    path('chatroompage', consumers.ChatConsumer),
]

Solution 7:^[7]

in my case there were unresolved packages in consumer.py check if you have any unresolved packages in your channels .py files

Solution 8:^[8]

I am also facing the same problem.
Make sure:
=> The routing.py file should be inside the project root folder(i.e. django server, one that has settings.py, wsgi.py,..)
=> In settings.py include, ASGI_APPLICATION = "yourprojectrootname.routing.application"

=>Sometimes, the coding inside routing.py file may generate this error, to check if this is the case remove all the coding and enter the general template coding,

from channels.routing import ProtocolTypeRouter

application = ProtocolTypeRouter({
    # Empty for now (http->django views is added by default)
})

then run the 'python manage.py runserver'. This time if you didn't get any error then problem lies in coding inside routing.py. Debug and fix the issue.

=>In other cases this may be of version problem, downgrading to channels==2.1.2 works

Solution 9:^[9]

I was also having the same issue i did everything to resolve it, creating another virtual environment and installing older version of Django but after 2 days of hardware i came to realize that my consumers.py file was missing with just a 's' in consumer's' and after that i also corrected in my routing.py file. May be this could be your problem also please do check all the file names first.

Solution 10:^[10]

I've recently faced to this problem, and quickly solved it. After checking the configurations in settings.py and routing.py, I found the problem is in this line:

from channels.auth import AuthMiddlewareStack

the problem is the version compatibility. Then, I upgraded the requirements.txt to the below and it works quiet well.

channels==2.4.0
channels-redis==2.4.2
daphne==2.5.0

Solution 11:^[11]

When importing your app with absolute path in myapp/routing make sure it is imported like:

import myapp.routing

from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter, URLRouter
import myapp.routing

application = ProtocolTypeRouter({
    # (http->django views is added by default)
    'websocket': AuthMiddlewareStack(
        URLRouter(
            myapp.routing.websocket_urlpatterns
        )
    ),
})

It may give you warning as error in PyCharm but you will have working Django channels. I reported it as bug to PyCharm. I hope no one else will spend 3-4 hours on it like me)

Solution 12:^[12]

You should put routing.py inside mysite/mysite/ not mysite/ otherwise you won't be able to use ASGI_APPLICATION = mysite.routing.application in the settings file and you get that error.

Solution 13:^[13]

I have written the below code in asgi.py file, websocket_urlpatterns is imported from routing.py file. This is worked for me.

import os

from django.core.asgi import get_asgi_application

from channels.routing import ProtocolTypeRouter,URLRouter
from channels.auth import AuthMiddlewareStack
from .routing import websocket_urlpatterns


os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myApp.settings')



application = ProtocolTypeRouter({
    'http': get_asgi_application(),
    'websocket': AuthMiddlewareStack(URLRouter(websocket_urlpatterns))
})

Solution 14:^[14]

try

python3 manage.py shell
>>> from your_project import asgi

if you see below

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/your_project/asgi.py", line 14, in <module>
    from django.core.asgi import get_asgi_application
ModuleNotFoundError: No module named 'django.core.asgi'

your django version is lower than 3.x. asgi is supported after 3.x

found it from here

Django application: No module named 'django.core.asgi'

Solution 15:^[15]

This problem is course by not importing the get_asgi_application in asgi.py file in settings.py actually had the same issue when i was trying to deploy my app but was able to resolve it by importting get_asgi_application and using it as a traditional http request fallback like so in the asgi.py file :

mport os

from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter, URLRouter
from channels.security.websocket import AllowedHostsOriginValidator
from django.core.asgi import get_asgi_application
from django.urls import path

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
# Initialize Django ASGI application early to ensure the AppRegistry
# is populated before importing code that may import ORM models.
django_asgi_app = get_asgi_application()

from chat.consumers import AdminChatConsumer, PublicChatConsumer

application = ProtocolTypeRouter({
    # Django's ASGI application to handle traditional HTTP requests
    "http": django_asgi_app,

    # WebSocket chat handler
    "websocket": AllowedHostsOriginValidator(
        AuthMiddlewareStack(
            URLRouter([
                path("chat/admin/", AdminChatConsumer.as_asgi()),
                path("chat/", PublicChatConsumer.as_asgi()),
            ])
        )
    ),
})

Solution 16:^[16]

I solved my problem by:

python manage.py migrate
python manage.py makemigrations
python manage.py migrate

Also check if you have put the routing.py file in the wrong directory. It should be 'myproject/routing.py'

Solution 17:^[17]

Changing define ASGI_APPLICATION variable and CHANNEL_LAYERS.default.ROUTING variable from

<project_name>.routing.application

routing.application

With this, I can run properly

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Voilin
Solution 2	Shersha Fn
Solution 3	Bharat Rajani
Solution 4	Lev Slinsen
Solution 5	wint3rmute
Solution 6
Solution 7	Mawardy
Solution 8	Jerome
Solution 9	Engineering Projects
Solution 10	Hosein Basafa
Solution 11	Ergash Masharipov
Solution 12	cristian
Solution 13	Biswajit Mishra
Solution 14	Jaewon.A.C
Solution 15	Godda
Solution 16	Ritik Jain
Solution 17	Ahmet Onur Solmaz

'Cannot import ASGI_APPLICATION module while runserver using channels 2

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]

Solution 6:[6]

Solution 7:[7]

Solution 8:[8]

Solution 9:[9]

Solution 10:[10]

Solution 11:[11]

Solution 12:[12]

Solution 13:[13]

Solution 14:[14]

Solution 15:[15]

Solution 16:[16]

Solution 17:[17]