sites.py 文件源码

def check_dependencies(self):
        """
        Check that all things needed to run the admin have been correctly installed.

        The default implementation checks that LogEntry, ContentType and the
        auth context processor are installed.
        """
        from django.contrib.contenttypes.models import ContentType

        if not ContentType._meta.installed:
            raise ImproperlyConfigured("Put 'django.contrib.contenttypes' in "
                                       "your INSTALLED_APPS setting in order to use the admin application.")
        if not ('django.contrib.auth.context_processors.auth' in settings.TEMPLATE_CONTEXT_PROCESSORS or
                'django.core.context_processors.auth' in settings.TEMPLATE_CONTEXT_PROCESSORS):
            raise ImproperlyConfigured("Put 'django.contrib.auth.context_processors.auth' "
                                       "in your TEMPLATE_CONTEXT_PROCESSORS setting in order to use the admin application.")