" RuntimeError: Model class wagtail.core.models.Site doesn't declare an explicit app_label and isn

Question

我在鹡鸰网站上关注了布伦特·克拉克。我试图在后端添加鹡鸰 cms 来使用 GraphQL 和 Python+Django 来响应应用程序。当我尝试迁移时，出现此错误：

RuntimeError: Model class wagtail.core.models.Site doesn't declare
an explicit app_label and isn't in an application in INSTALLED_APPS

点冻结给出：

aniso8601==3.0.2 
beautifulsoup4==4.6.3 
certifi==2018.8.13 
chardet==3.0.4 
Django==2.0.8 
django-modelcluster==4.2 
django-taggit==0.23.0 
django-treebeard==4.3 
django-webpack-loader==0.6.0 
djangorestframework==3.8.2 
draftjs-exporter==2.1.2 
graphene==2.1.3 
graphene-django==2.1.0 
graphql-core==2.1 
graphql-relay==0.4.5 
html5lib==1.0.1 
idna==2.7 
iso8601==0.1.12 
Pillow==5.2.0 
promise==2.1 
psycopg2==2.7.5 
pytz==2018.5 
requests==2.19.1 
Rx==1.6.1 
singledispatch==3.4.0.3 
six==1.11.0 
typing==3.6.4 
Unidecode==0.4.21 
urllib3==1.23 
wagtail==2.1.2 
webencodings==0.5.1 
Willow==1.1 

Answer 1

它接缝您没有在 settings.py 文件中安装该应用程序。

您需要将其添加到设置"INSTALLED_APPS"中：

INSTALLED_APPS = [
...
'django.contrib.sites',
]

此外，您需要添加正在配置的站点的 ID：

SITE_ID = 1