Setting up Django app on Heroku + Amazon S3 - django

Question

I've successfully deployed a live Django app on Heroku for the first time. However, I didn't realize that Heroku doesn't store media files - I want the admin to be able to upload images to the app - so I am trying to setup Amazon S3. This is my first time doing this setup.
1)My settings.py file includes this...
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
'NAME': "os.path.join(BASE_DIR, 'db.sqlite3')", # Or path to database file if using sqlite3.
# The following settings are not used with sqlite3:
'USER': '',
'PASSWORD': '',
'HOST': '', # Empty for localhost through domain sockets or '127.0.0.1' for localhost through TCP.
'PORT': '', # Set to empty string for default.
}
}
MEDIA_ROOT = '/media/'
MEDIA_URL = S3_URL + MEDIA_ROOT
STATIC_ROOT = 'staticfiles'
STATIC_URL = '/static/'
STATICFILES_DIRS = (
os.path.join(BASE_DIR, 'static'),
)
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
STATICFILES_FINDERS = (
'django.contrib.staticfiles.finders.FileSystemFinder',
'django.contrib.staticfiles.finders.AppDirectoriesFinder',
# 'django.contrib.staticfiles.finders.DefaultStorageFinder',
)
# List of callables that know how to import templates from various sources.
TEMPLATE_LOADERS = (
'django.template.loaders.filesystem.Loader',
'django.template.loaders.app_directories.Loader',
# 'django.template.loaders.eggs.Loader',
)
MIDDLEWARE_CLASSES = (
'django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
# Uncomment the next line for simple clickjacking protection:
# 'django.middleware.clickjacking.XFrameOptionsMiddleware',
)
ROOT_URLCONF = 'listing.urls'
# Python dotted path to the WSGI application used by Django's runserver.
WSGI_APPLICATION = 'listing.wsgi.application'
TEMPLATE_DIRS = (
# Put strings here, like "/home/html/django_templates" or "C:/www/django/templates".
# Always use forward slashes, even on Windows.
# Don't forget to use absolute paths, not relative paths.
)
INSTALLED_APPS = (
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
# Uncomment the next line to enable the admin:
'django.contrib.admin',
'noticeboard',
'django_extensions',
'south',
'PIL',
'storages',
'boto',
# Uncomment the next line to enable admin documentation:
# 'django.contrib.admindocs',
)
# Honor the 'X-Forwarded-Proto' header for request.is_secure()
DATABASES['default'] = dj_database_url.config()
SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https')
AWS_ACCESS_KEY_ID = os.environ['AWS_ACCESS_KEY_ID']
ASW_SECRET_ACCESS_KEY = os.environ['AWS_SECRET_ACCESS_KEY']
S3_BUCKET_NAME = os.environ['S3_BUCKET_NAME']
STATICFILES_STORAGE = 'storages.backends.s3boto.s3BotoStorage'
DEFAULT_FILE_STORAGE = 'storages.backends.s3boto.s3BotoStorage'
S3_URL = 'http://s3.amazonaws.com/%s' % S3_BUCKET_NAME
2) I've updated my requirements.txt file to include the boto and storages modules
3) I've setup my Heroku config file to include my bucket name, AWS Key and secret key.
This is the error I'm getting when I upload an image from the admin, it seems as if it's still trying to access the files on Heroku and not S3:
Exception Type: OSError
Exception Value:
[Errno 30] Read-only file system: '/Users'
Exception Location: /app/.heroku/python/lib/python2.7/os.py in makedirs, line 157
Python Executable: /app/.heroku/python/bin/python
Python Version: 2.7.4
I've read a few blog posts about this that say the same thing but I'm stuck as to why this isn't working!