無法定義默認緩存Django

Question

我想在Django中設置緩存，但它不會讓我定義默認緩存。 我不是太在意我使用什麼類型的緩存

但是，即使複製粘貼+他們的榜樣代碼中的錯誤檢查器告訴我（我曾經嘗試Filesystem和Database緩存）：

?: (caches.E001) You must define a 'default' cache in your CACHES setting. 

我也嘗試將CACHES設置放在settings.py文件的底部，以確保CACHES設置可能依賴的任何內容都被初始化。

我的代碼如下：

CACHES = { 
    'default': { 
     'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache', 
     'LOCATION': '/var/tmp/django_cache', 
    } 
} 

完整的錯誤信息是：

Unhandled exception in thread started by <function check_errors. 

<locals>.wrapper at 0x0436A300> 
Traceback (most recent call last): 
    File "C:\Users\Kasper\Documents\kasperfred-blog\kasperfred-blog\lib\site-packages\django\utils\autoreload.py", line 226, in wrapper 
    fn(*args, **kwargs) 
    File "C:\Users\Kasper\Documents\kasperfred-blog\kasperfred-blog\lib\site-packages\django\core\management\commands\runserver.py", line 116, in inner_run 
    self.check(display_num_errors=True) 
    File "C:\Users\Kasper\Documents\kasperfred-blog\kasperfred-blog\lib\site-packages\django\core\management\base.py", line 472, in check 
    raise SystemCheckError(msg) 
django.core.management.base.SystemCheckError: SystemCheckError: System check identified some issues: 

ERRORS: 
?: (caches.E001) You must define a 'default' cache in your CACHES setting. 

大部分的設置文件（編輯了祕密密鑰）

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/1.9/howto/deployment/checklist/ 

# SECURITY WARNING: keep the secret key used in production secret! 
SECRET_KEY = 'Sorry' 

# 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', 

    'posts', 

    # Third party 
    'trumbowyg', 
    'crispy_forms', 
    'taggit', 
    'imagefit', 
] 

CRISPY_TEMPLATE_PACK = 'bootstrap3' 
TAGGIT_CASE_INSENSITIVE = True 

# Image fit settings 
IMAGEFIT_ROOT = "public" 
IMAGEFIT_PRESETS = { 
    'card_small': {'width': 64, 'height': 64, 'crop': True}, 
    'my_preset1': {'width': 300, 'height': 220}, 
    'my_preset2': {'width': 100}, 
} 

MIDDLEWARE_CLASSES = [ 
    'django.middleware.security.SecurityMiddleware', 
    'django.contrib.sessions.middleware.SessionMiddleware', 
    'django.middleware.common.CommonMiddleware', 
    'django.middleware.csrf.CsrfViewMiddleware', 
    'django.contrib.auth.middleware.AuthenticationMiddleware', 
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 
    'django.contrib.messages.middleware.MessageMiddleware', 
    'django.middleware.clickjacking.XFrameOptionsMiddleware', 
] 

ROOT_URLCONF = 'kasperfred_blog.urls' 

TEMPLATES = [ 
    { 
     'BACKEND': 'django.template.backends.django.DjangoTemplates', 
     'DIRS': [os.path.join(BASE_DIR, 'templates')], 
     '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 = 'kasperfred_blog.wsgi.application' 


# Database 
# https://docs.djangoproject.com/en/1.9/ref/settings/#databases 

DATABASES = { 
    'default': { 
     'ENGINE': 'django.db.backends.sqlite3', 
     'NAME': os.path.join(BASE_DIR, 'db.sqlite3'), 
    } 
} 

# Password validation 
# https://docs.djangoproject.com/en/1.9/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/1.9/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/1.9/howto/static-files/ 

STATIC_URL = '/static/' 
MEDIA_URL = "/media/" 

STATICFILES_DIRS = [ 
    os.path.join(BASE_DIR, "static"), 
    #'/var/www/static/', 
] 

STATIC_ROOT = os.path.join(os.path.dirname(BASE_DIR), "static_cdn") 
MEDIA_ROOT = os.path.join(os.path.dirname(BASE_DIR), "media_cdn") 

# Cache 
CACHES = { 
    'default': { 
     'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache', 
     'LOCATION': '/var/tmp/django_cache', 
    } 

} 

Answer 1

這個問題是由imagefit造成的，它將覆蓋CACHES設置爲1時oaded：

settings.CACHES = { 
    IMAGEFIT_CACHE_BACKEND_NAME: { 
     'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache', 
     'LOCATION': os.path.join(tempfile.gettempdir(), 'django_imagefit') 
    } 
} 

顯然的問題是recently fixed - 所以它應該工作，如果你能得到的最新版本。

我無法從Github存儲庫中知道在進行此更改後PyPi中是否有新版本發佈。