object() takes no parameters in django 1.10

Question

I'm trying to allow CORS in my app, so that my cross-domain javascript client can access my API, I've installed django-cors-headers. And I'm now trying to add the middleware:

MIDDLEWARE = [
    'corsheaders.middleware.CorsMiddleware', # Remove this and it works
    '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',
]

However this gives me a TypeError:

TypeError: object() takes no parameters

This worked fine before the django 1.10 update. Any ideas?

Answer 1

If you have custom middleware and you've moved from MIDDLEWARE_CLASSES to MIDDLEWARE, then you need to update your middleware. Details on: this Django documentation page. TL;DR, subclass from MiddlewareMixin instead of object:

from django.utils.deprecation import MiddlewareMixin
class FOOMiddleware(MiddlewareMixin):
    pass