settings.py

import os
from pathlib import Path

os.environ["DJANGO_ALLOW_ASYNC_UNSAFE"] = "true"
SECRET_KEY = os.environ.get('SECRET_KEY', '1234verysecret')

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = Path(__file__).resolve().parent.parent

if os.environ.get('DEBUG'):
    DEBUG = True
else:
    DEBUG = False

ADD_ALLOWED_HOST = os.environ.get('ALLOWED_HOST', '*')
ALLOWED_HOSTS = [
    "127.0.0.1",
    "0.0.0.0",
    ADD_ALLOWED_HOST,
]

if os.environ.get('SQLITE'):
    DATABASES = {
        'default': {
            'ENGINE': 'django.db.backends.sqlite3',
            'NAME': BASE_DIR / 'db.sqlite3',
        }
    }
else:
    DATABASES = {
        'default': {
            'ENGINE': os.environ.get('DB_TYP', 'django.db.backends.postgresql'),
            'NAME': os.environ.get('DB_NAME', 'vocabseditor'),
            'USER': os.environ.get('DB_USER', 'postgres'),
            'PASSWORD': os.environ.get('DB_PASSWORD', 'postgres'),
            'HOST': os.environ.get('DB_HOST', 'localhost'),
            'PORT': os.environ.get('DB_PORT', '5432')
        }
    }

# Application definition

INSTALLED_APPS = [
    'dal',
    'dal_select2',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'reversion',
    'guardian',
    'crispy_forms',
    'django_celery_results',
    'django_filters',
    'django_tables2',
    'rest_framework',
    'webpage',
    'browsing',
    'vocabs',
    'mptt',
    'drf_yasg',
    # 'django_extensions',
]
if DEBUG:
    INSTALLED_APPS = INSTALLED_APPS + ['django_extensions']

SWAGGER_SETTINGS = {
    'LOGOUT_URL': '/logout/',
    'SECURITY_DEFINITIONS': {
        'basic': {
            'type': 'basic'
        }
    },
}

CRISPY_TEMPLATE_PACK = "bootstrap4"

REST_FRAMEWORK = {
    'DEFAULT_PERMISSION_CLASSES': ('rest_framework.permissions.IsAuthenticatedOrReadOnly',),
}

AUTHENTICATION_BACKENDS = [
    'django.contrib.auth.backends.ModelBackend',
    'guardian.backends.ObjectPermissionBackend',
]

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',
    'reversion.middleware.RevisionMiddleware',
]

ROOT_URLCONF = 'vocabseditor.urls'

SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')

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',
                'webpage.webpage_content_processors.installed_apps',
                'webpage.webpage_content_processors.is_dev_version',
                'webpage.webpage_content_processors.get_db_name',
            ],
        },
    },
]

WSGI_APPLICATION = 'vocabseditor.wsgi.application'

AUTHENTICATION_BACKENDS = (
    'django.contrib.auth.backends.ModelBackend',  # this is default
    'guardian.backends.ObjectPermissionBackend',
)

# Password validation
# https://docs.djangoproject.com/en/1.11/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/1.11/topics/i18n/

LANGUAGE_CODE = 'en'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.11/howto/static-files/

STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles/')
STATIC_URL = 'static/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media/')
MEDIA_URL = 'media/'


REDMINE_ID = os.environ.get('REDMINE_ID', '12305')
PROJECT_NAME = os.environ.get('PROJECT_NAME', 'vocabseditor')
VOCABS_DEFAULT_PEFIX = os.environ.get('VOCABS_DEFAULT_PEFIX', 'vocabseditor')
VOCABS_SEPARATOR = os.environ.get('VOCABS_SEPARATOR', '/')
BASE_URL = f"https://{PROJECT_NAME}.acdh.oeaw.ac.at"

VOCABS_SETTINGS = {
    'default_prefix': VOCABS_DEFAULT_PEFIX,
    'default_ns': "http://www.vocabs/{}/".format(VOCABS_DEFAULT_PEFIX),
    'default_lang': "en"
}

CELERY_RESULT_BACKEND = 'django-db'
CELERY_BROKER_URL = os.environ.get('amqp://')
CELERY_TASK_TRACK_STARTED = True
CELERY_RESULT_EXTENDED = True

GHPAT = os.environ.get('GHPAT')
GHREPO = os.environ.get('GHREPO', 'acdh-oeaw/vocabseditor-dumps')


# Django guardian settings

# ANONYMOUS_USER_NAME = 'public'

# if ANONYMOUS_USER_NAME is set to None, anonymous user object permissions-are disabled.