Traté de hacer una aplicación de chat con django-channels . Pero ocurre un RuntimeError cuando creo un nuevo proyecto django-chanels y edito datos en el sitio de administración.

No estoy seguro de pensar que el error ocurrió porque hice varios proyectos django-channels .

Cuando construí mi primer proyecto, WebSocket no funciona, así que hice otro segundo, tercero y cuarto proyecto con django-channels . Ahora WebSocket está conectado, pero tengo problemas con RuntimeError (mensaje de error: el ejecutor de un solo subproceso ya es usuario, se interbloquearía)

¿Qué puedo hacer para arreglar esto?

miproyecto/configuraciones.py

 import os 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/3.2/howto/deployment/checklist/ # SECURITY WARNING: keep the secret key used in production secret! SECRET_KEY = "django-insecure-is!$&voe3y058!2sus9egmxh@d!$)=l&o8_vl=m8zz!ap+d#a#" # SECURITY WARNING: don't run with debug turned on in production! DEBUG = True ALLOWED_HOSTS = [] # Application definition INSTALLED_APPS = [ "django.contrib.admin", "django.contrib.auth", "django.contrib.contenttypes", "django.contrib.sessions", "django.contrib.messages", "django.contrib.staticfiles", "users.apps.UsersConfig", "channels", "core.apps.CoreConfig", "broadcasts.apps.BroadcastsConfig", ] MIDDLEWARE = [ "django.middleware.security.SecurityMiddleware", "django.contrib.sessions.middleware.SessionMiddleware", "django.middleware.common.CommonMiddleware", "django.middleware.csrf.CsrfViewMiddleware", "django.contrib.auth.middleware.AuthenticationMiddleware", "django.contrib.messages.middleware.MessageMiddleware", "django.middleware.clickjacking.XFrameOptionsMiddleware", ] ROOT_URLCONF = "busker.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", ], }, }, ] WSGI_APPLICATION = "busker.wsgi.application" # Database # https://docs.djangoproject.com/en/3.2/ref/settings/#databases DATABASES = { "default": { "ENGINE": "django.db.backends.sqlite3", "NAME": BASE_DIR / "db.sqlite3", } } # Password validation # https://docs.djangoproject.com/en/3.2/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/3.2/topics/i18n/ LANGUAGE_CODE = "en-us" TIME_ZONE = "UTC" USE_I18N = True USE_L10N = True USE_TZ = True # Static files (CSS, JavaScript, Images) # https://docs.djangoproject.com/en/3.2/howto/static-files/ STATIC_URL = "/static/" STATICFILES_DIRS = [os.path.join(BASE_DIR, "static")] # Default primary key field type # https://docs.djangoproject.com/en/3.2/ref/settings/#default-auto-field DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField" ASGI_APPLICATION = "busker.asgi.application" CHANNEL_LAYERS = {"default": {"BACKEND": "channels.layers.InMemoryChannelLayer"}} AUTH_USER_MODEL = "users.User"

miproyecto/asgi.py

 import os from channels.routing import ProtocolTypeRouter, URLRouter from django.core.asgi import get_asgi_application from channels.auth import AuthMiddlewareStack import broadcasts.routing os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings") application = ProtocolTypeRouter( { "http": get_asgi_application(), # Just HTTP for now. (We can add other protocols later.) "websocket": AuthMiddlewareStack( URLRouter(broadcasts.routing.websocket_urlpatterns) ), } )

miaplicación/consumidores.py

 import json from channels.generic.websocket import AsyncWebsocketConsumer class ChatConsumer(AsyncWebsocketConsumer): async def connect(self): self.room_group_name = "Test-Room" await self.channel_layer.group_add(self.room_group_name, self.channel_name) await self.accept() async def disconnect(self, close_code): await self.channel_layer.group_discard(self.room_group_name, self.channel_name) print("Disconnected!") async def receive(self, text_data): receive_dict = json.loads(text_data) message = receive_dict["message"] await self.channel_layer.group_send( self.room_group_name, {"type": "send.message", "message": message} ) async def send_message(self, event): message = event["message"] await self.send(text_data=json.dumps({"message": message}))

miaplicación/routing.py

 from django.urls import re_path from . import consumers websocket_urlpatterns = [ re_path(r"", consumers.ChatConsumer.as_asgi()), ]