heroku - django images wont work in heroku but works fine locally

I am new to Django and Heroku. My installation works fine locally but when its pushed to Heroku im not able to see css, js or images in my site.

This is my url patterns:

urlpatterns = patterns('',
    # Examples:
    # url(r'^$', 'blog.views.home', name='home'),
    # url(r'^blog/', include('blog.foo.urls')),

    # Uncomment the admin/doc line below to enable admin documentation:
    url(r'^admin/doc/', include('django.contrib.admindocs.urls')),

    # Uncomment the next line to enable the admin:
    url(r'^admin/', include(admin.site.urls)),
    url(r'^comments/', include('django.contrib.comments.urls')),
    url(r'^blog/', include('zinnia.urls')),
    url(r'^', include('cms.urls')),
)

if settings.DEBUG:
    urlpatterns = patterns('',
        (r'^' + settings.MEDIA_URL.lstrip('/'), include('appmedia.urls')),
    ) + urlpatterns

And this is my settings.py

STATIC_ROOT = os.path.join(PROJECT_PATH, "static")

# URL prefix for static files.
# Example: "http://media.lawrence.com/static/"
STATIC_URL = '/static/'

# Additional locations of static files
STATICFILES_DIRS = (
    # Put strings here, like "/home/html/static" or "C:/www/django/static".
    # Always use forward slashes, even on Windows.
    # Don't forget to use absolute paths, not relative paths.
)

Please let me know where i am going wrong. Thanks in advance.

Cheers S

Solution

To serve staticfiles on Heroku, you will need to use an additional app like whitenoise. I followed these steps and was able to serve images on Heroku.

This link is the main guide: https://github.com/codingforentrepreneurs/Guides/blob/master/all/Heroku_Django_Deployment_Guide.md

These would be references (I would recommend going through the references also):

1) http://whitenoise.evans.io/en/stable/django.html

2) https://docs.djangoproject.com/en/3.0/howto/static-files/

3) https://docs.djangoproject.com/en/3.0/ref/templates/builtins/#std:templatetag-static

I ran into the same problem you ran into. Following the steps in the guide and references worked well for me.