我知道还有其他类似的问题,但我相信我已经解决了所有问题,但没有一个能够解决我的问题。当我使用 WSGI 服务器时,一切正常。只有当我使用 ASGI 服务器时才会发生这种情况,但是我必须使用 ASGI 服务器,因为没有它我的项目功能会受到限制。我正在使用 postgres 数据库。
另外,我相信在 localhost 上运行项目时没有问题,因为我检查了到我的数据库(在我的机器上进行开发)的连接数,我只看到了 1。那个 1 连接也不是来自 django 项目我的数据库,但这是我自己用来显式访问数据库的连接。我不知道为什么我的项目与数据库之间甚至没有一个连接。
Procfile
web: daphne aretheycoming.asgi:application --port $PORT --bind 0.0.0.0 -v2
aretheycomingworker: python manage.py runworker --settings=aretheycoming.settings -v2
asgi.py
import os
import django
from channels.routing import get_default_application
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "aretheycoming.settings")
django.setup()
application = get_default_application()
settings.py
import django_heroku
import os
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = hidden
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = [
'channels',
.
.
.
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
]
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 = 'aretheycoming.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 = 'aretheycoming.wsgi.application'
ASGI_APPLICATION = 'aretheycoming.routing.application'
CHANNEL_LAYERS = {
'default': {
'BACKEND': 'channels_redis.core.RedisChannelLayer',
'CONFIG': {
"hosts": [('127.0.0.1', 6379)],
"hosts": [os.environ.get('REDIS_URL', 'redis://localhost:6379')]
},
},
}
# Database
# https://docs.djangoproject.com/en/2.2/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql',
'NAME': hidden,
'USER': hidden,
'PASSWORD': hidden,
'HOST': '127.0.0.1',
'PORT': '5432',
}
}
# Password validation
# https://docs.djangoproject.com/en/2.2/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/2.2/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/2.2/howto/static-files/
STATIC_ROOT = ''
STATIC_URL = '/static/'
STATICFILES_DIRS = [
os.path.join(BASE_DIR, 'static'),
]
# Activate Django-Heroku.
django_heroku.settings(locals())
我尝试使用 django.db.close_all_connections() 但它不起作用,并且该项目在 wsgi 服务器上运行良好,所以我认为这不是问题。我对这些东西没有很好的理解,所以如果你能多做一点解释,我将不胜感激。
我在 Heroku 上设置了环境变量 ASGI_THREADS = 1。