Getting error when trying to run to server with Channels - django

Question

I'm having a problem running python manage.py runserver, to better exemplify, see my code inspired by the book Django 3 by Example.
settings.py:
"""
Django settings for educa project.
Generated by 'django-admin startproject' using Django 4.1.
For more information on this file, see
https://docs.djangoproject.com/en/4.1/topics/settings/
For the full list of settings and their values, see
https://docs.djangoproject.com/en/4.1/ref/settings/
"""
from pathlib import Path
# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/4.1/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'XXX'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = [
'channels',
'courses.apps.CoursesConfig',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'students.apps.StudentsConfig',
'embed_video',
'debug_toolbar',
'redisboard',
'chat.apps.ChatConfig',
]
MIDDLEWARE = [
'debug_toolbar.middleware.DebugToolbarMiddleware',
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
# 'django.middleware.cache.UpdateCacheMiddleware',
'django.middleware.common.CommonMiddleware',
# 'django.middleware.cache.FetchFromCacheMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'educa.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
ASGI_APPLICATION = 'educa.routing.application'
WSGI_APPLICATION = 'educa.wsgi.application'
# Database
# https://docs.djangoproject.com/en/4.1/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': BASE_DIR / 'db.sqlite3',
}
}
# Password validation
# https://docs.djangoproject.com/en/4.1/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
# Internationalization
# https://docs.djangoproject.com/en/4.1/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/4.1/howto/static-files/
STATIC_URL = 'static/'
MEDIA_URL = 'media/'
MEDIA_ROOT = BASE_DIR / 'media'
# Default primary key field type
# https://docs.djangoproject.com/en/4.1/ref/settings/#default-auto-field
DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
from django.urls import reverse_lazy
LOGIN_REDIRECT_URL = reverse_lazy('student_course_list')
'''CACHES = {
'default': {
'BACKEND': 'django.core.cache.backends.redis.RedisCache',
'LOCATION': 'redis://127.0.0.1:6379',
}
}
CACHE_MIDDLEWARE_ALIAS = 'default'
CACHE_MIDDLEWARE_SECONDS = 60 * 15 # 15 minutes
CACHE_MIDDLEWARE_KEY_PREFIX = 'educa'
INTERNAL_IPS = [
'127.0.0.1',
]
'''
project/urls.py:
from django.contrib import admin
from django.urls import path, include
from django.conf import settings
from django.conf.urls.static import static
from django.contrib.auth import views as auth_views
from courses.views import CourseListView
urlpatterns = [
path('accounts/login/', auth_views.LoginView.as_view(),
name='login'),
path('accounts/logout/', auth_views.LogoutView.as_view(),
name='logout'),
path('admin/', admin.site.urls),
path('course/', include('courses.urls')),
path('', CourseListView.as_view(), name='course_list'),
path('students/', include('students.urls')),
path('__debug__/', include('debug_toolbar.urls')),
path('chat/', include('chat.urls', namespace='chat')),
]
if settings.DEBUG:
urlpatterns += static(settings.MEDIA_URL,
document_root=settings.MEDIA_ROOT)
chat/views.py:
from django.shortcuts import render, get_object_or_404
from django.http import HttpResponseForbidden
from django.contrib.auth.decorators import login_required
#login_required
def course_chat_room(request, course_id):
try:
# retrieve course with given id joined by the current user
course = request.user.courses_joined.get(id=course_id)
except:
# user is not a student of the course or course does not exist
return HttpResponseForbidden()
return render(request, 'chat/room.html', {'course': course})
chat/urls.py:
from django.urls import path
from . import views
app_name = 'chat'
urlpatterns = [
path('room/<int:course_id>/', views.course_chat_room,
name='course_chat_room'),
]
chat/consumers.py:
import json
from channels.generic.websocket import AsyncWebsocketConsumer
from asgiref.sync import async_to_sync
from django.utils import timezone
class ChatConsumer(AsyncWebsocketConsumer):
async def connect(self):
self.user = self.scope['user']
self.id = self.scope['url_route']['kwargs']['course_id']
self.room_group_name = 'chat_%s' % self.id
# join room group
await self.channel_layer.group_add(
self.room_group_name,
self.channel_name
)
# accept connection
await self.accept()
async def disconnect(self, close_code):
# leave room group
await self.channel_layer.group_discard(
self.room_group_name,
self.channel_name
)
# receive message from WebSocket
async def receive(self, text_data):
text_data_json = json.loads(text_data)
message = text_data_json['message']
now = timezone.now()
# send message to room group
await self.channel_layer.group_send(
self.room_group_name,
{
'type': 'chat_message',
'message': message,
'user': self.user.username,
'datetime': now.isoformat(),
}
)
# receive message from room group
async def chat_message(self, event):
# send message to WebSocket
await self.send(text_data=json.dumps(event))
chat/routing.py:
from django.urls import re_path
from . import consumers
websocket_urlpatterns = [
re_path(r'ws/chat/room/(?P<course_id>\d+)/$', consumers.
ChatConsumer),
]
project/routing.py:
from channels.auth import AuthMiddlewareStack
from channels.routing import ProtocolTypeRouter, URLRouter
import chat.routing
application = ProtocolTypeRouter({
'websocket': AuthMiddlewareStack(
URLRouter(
chat.routing.websocket_urlpatterns
)
),
})
ERROR:
Watching for file changes with StatReloader
Performing system checks...
System check identified no issues (0 silenced).
October 27, 2022 - 15:50:38
Django version 4.1.2, using settings 'educa.settings'
Starting ASGI/Channels version 2.4.0 development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
Exception in thread django-main-thread:
Traceback (most recent call last):
File "C:\Users\Sagittarius Infiny A\Desktop\educa2\env\lib\site-packages\channels\routing.py", line 29, in get_default_application
module = importlib.import_module(path)
File "C:\Users\Sagittarius Infiny A\AppData\Local\Programs\Python\Python310\lib\importlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 883, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "C:\Users\Sagittarius Infiny A\Desktop\educa2\educa\routing.py", line 1, in <module>
from channels.auth import AuthMiddlewareStack
File "C:\Users\Sagittarius Infiny A\Desktop\educa2\env\lib\site-packages\channels\auth.py", line 15, in <module>
from django.utils.translation import LANGUAGE_SESSION_KEY
ImportError: cannot import name 'LANGUAGE_SESSION_KEY' from 'django.utils.translation' (C:\Users\Sagittarius Infiny A\Desktop\educa2\env\lib\site-packages\django\utils\translation\__init__.py)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\Sagittarius Infiny A\AppData\Local\Programs\Python\Python310\lib\threading.py", line 1016, in _bootstrap_inner
self.run()
File "C:\Users\Sagittarius Infiny A\AppData\Local\Programs\Python\Python310\lib\threading.py", line 953, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\Sagittarius Infiny A\Desktop\educa2\env\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "C:\Users\Sagittarius Infiny A\Desktop\educa2\env\lib\site-packages\channels\management\commands\runserver.py", line 101, in inner_run
application=self.get_application(options),
File "C:\Users\Sagittarius Infiny A\Desktop\educa2\env\lib\site-packages\channels\management\commands\runserver.py", line 126, in get_application
return StaticFilesWrapper(get_default_application())
File "C:\Users\Sagittarius Infiny A\Desktop\educa2\env\lib\site-packages\channels\routing.py", line 31, in get_default_application
raise ImproperlyConfigured("Cannot import ASGI_APPLICATION module %r" % path)
django.core.exceptions.ImproperlyConfigured: Cannot import ASGI_APPLICATION module 'educa.routing'
When trying the interactive module and trying to import the application from the project's routing.py, I get this error.
$ python manage.py shell
>> from educa.routing import application
Traceback (most recent call last): File "<console>", line 1, in <module>
File "C:\Users\Sagittarius Infiny A\Desktop\educa2\educa\routing.py", line 1, in <module>
from channels.auth import AuthMiddlewareStack
File "C:\Users\Sagittarius Infiny A\Desktop\educa2\env\lib\site-packages\channels\auth.py", line 15, in <module>
from django.utils.translation import LANGUAGE_SESSION_KEY
ImportError: cannot import name 'LANGUAGE_SESSION_KEY' from 'django.utils.translation' (C:\Users\Sagittarius Infiny A\Desktop\educa2\env\lib\site-packages\django\utils\translation\__init__.py)