Django Heroku Server Error (500) when I set Debug - False on True it is working fine

Question

I know that there are a lot of questions about that, but to be honest most of them stays unanswered or the solutions do not work.

I have "simple" problem. When I set Debug to False and push it to heroku I get "Server Error (500)". I read those topics:

Heroku server error (500) when Debug = False , whitenoise could not find style.css

Whenever debug=False in django, Heroku gives Server Error (500) and when debug=True no error

https://www.reddit.com/r/djangolearning/comments/acj65x/why_am_i_getting_a_500_server_error_when/

https://teamtreehouse.com/community/heroku-bad-request-500

And I tried their solutions but it still don't work. Only solution that I didn't test and is supposed to help is to get rid of whitenoise. This one is kinda "no go" for me.

What Can I do about this error?

Thanks and Cheers!

EDIT:

Here is my log. I tried to comment out white noise but It didn't help.

I was looking in my code but I don't have any reference to "favicon.ico". Also, I tried to run collectstatic because I found some topics related to that but it didn't work for me.

First it asked me:

You have requested to collect static files at the destination
location as specified in your settings:

    /app/staticfiles

And then I got error:

FileNotFoundError: [Errno 2] No such file or directory: '/app/static'

Which is weird, because first it confirmed with me that I overrited this folder from static to staticfiles. In my main directory I have folder "staticfiles". In my app folder I have folder "static". And with Debug off everything is working.

    2020-05-19T05:15:40.192943+00:00 heroku[router]: at=info method=GET path="/favicon.ico" host=robotbuilder.herokuapp.com request_id=eeaf4fd1-b73b-4e84-aacd-7e701d3e8932 fwd="83.26.255.146" dyno=web.1 connect=1ms service=3ms status=404 bytes=388 protocol=http

2020-05-19T05:15:39.991705+00:00 app[web.1]: [2020-05-19 05:15:39 +0000] [11] [ERROR] Error handling request /

2020-05-19T05:15:39.991725+00:00 app[web.1]: Traceback (most recent call last):

2020-05-19T05:15:39.991726+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/sync.py", line 134, in handle

2020-05-19T05:15:39.991734+00:00 app[web.1]:     self.handle_request(listener, req, client, addr)

2020-05-19T05:15:39.991734+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/gunicorn/workers/sync.py", line 175, in handle_request

2020-05-19T05:15:39.991735+00:00 app[web.1]:     respiter = self.wsgi(environ, resp.start_response)

2020-05-19T05:15:39.991735+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/wsgi.py", line 133, in __call__

2020-05-19T05:15:39.991735+00:00 app[web.1]:     response = self.get_response(request)

2020-05-19T05:15:39.991736+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/base.py", line 75, in get_response

2020-05-19T05:15:39.991736+00:00 app[web.1]:     response = self._middleware_chain(request)

2020-05-19T05:15:39.991736+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 36, in inner

2020-05-19T05:15:39.991737+00:00 app[web.1]:     response = response_for_exception(request, exc)

2020-05-19T05:15:39.991739+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception

2020-05-19T05:15:39.991740+00:00 app[web.1]:     response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

2020-05-19T05:15:39.991741+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner

2020-05-19T05:15:39.991741+00:00 app[web.1]:     response = get_response(request)

2020-05-19T05:15:39.991741+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/whitenoise/middleware.py", line 58, in __call__

2020-05-19T05:15:39.991742+00:00 app[web.1]:     response = self.get_response(request)

2020-05-19T05:15:39.991746+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 36, in inner

2020-05-19T05:15:39.991747+00:00 app[web.1]:     response = response_for_exception(request, exc)

2020-05-19T05:15:39.991747+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception

2020-05-19T05:15:39.991747+00:00 app[web.1]:     response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

2020-05-19T05:15:39.991747+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner

2020-05-19T05:15:39.991748+00:00 app[web.1]:     response = get_response(request)

2020-05-19T05:15:39.991748+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/deprecation.py", line 94, in __call__

2020-05-19T05:15:39.991748+00:00 app[web.1]:     response = response or self.get_response(request)

2020-05-19T05:15:39.991748+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 36, in inner

2020-05-19T05:15:39.991749+00:00 app[web.1]:     response = response_for_exception(request, exc)

2020-05-19T05:15:39.991749+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception

2020-05-19T05:15:39.991749+00:00 app[web.1]:     response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

2020-05-19T05:15:39.991750+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner

2020-05-19T05:15:39.991750+00:00 app[web.1]:     response = get_response(request)

2020-05-19T05:15:39.991750+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/deprecation.py", line 94, in __call__

2020-05-19T05:15:39.991750+00:00 app[web.1]:     response = response or self.get_response(request)

2020-05-19T05:15:39.991751+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 36, in inner

2020-05-19T05:15:39.991751+00:00 app[web.1]:     response = response_for_exception(request, exc)

2020-05-19T05:15:39.991751+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception

2020-05-19T05:15:39.991752+00:00 app[web.1]:     response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

2020-05-19T05:15:39.991752+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner

2020-05-19T05:15:39.991752+00:00 app[web.1]:     response = get_response(request)

2020-05-19T05:15:39.991752+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/deprecation.py", line 94, in __call__

2020-05-19T05:15:39.991753+00:00 app[web.1]:     response = response or self.get_response(request)

2020-05-19T05:15:39.991753+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 36, in inner

2020-05-19T05:15:39.991753+00:00 app[web.1]:     response = response_for_exception(request, exc)

2020-05-19T05:15:39.991753+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception

2020-05-19T05:15:39.991754+00:00 app[web.1]:     response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

2020-05-19T05:15:39.991754+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner

2020-05-19T05:15:39.991755+00:00 app[web.1]:     response = get_response(request)

2020-05-19T05:15:39.991763+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/deprecation.py", line 94, in __call__

2020-05-19T05:15:39.991763+00:00 app[web.1]:     response = response or self.get_response(request)

2020-05-19T05:15:39.991763+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 36, in inner

2020-05-19T05:15:39.991764+00:00 app[web.1]:     response = response_for_exception(request, exc)

2020-05-19T05:15:39.991764+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception

2020-05-19T05:15:39.991764+00:00 app[web.1]:     response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

2020-05-19T05:15:39.991764+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner

2020-05-19T05:15:39.991765+00:00 app[web.1]:     response = get_response(request)

2020-05-19T05:15:39.991765+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/deprecation.py", line 94, in __call__

2020-05-19T05:15:39.991765+00:00 app[web.1]:     response = response or self.get_response(request)

2020-05-19T05:15:39.991765+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 36, in inner

2020-05-19T05:15:39.991766+00:00 app[web.1]:     response = response_for_exception(request, exc)

2020-05-19T05:15:39.991766+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception

2020-05-19T05:15:39.991766+00:00 app[web.1]:     response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

2020-05-19T05:15:39.991766+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner

2020-05-19T05:15:39.991767+00:00 app[web.1]:     response = get_response(request)

2020-05-19T05:15:39.991767+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/deprecation.py", line 94, in __call__

2020-05-19T05:15:39.991767+00:00 app[web.1]:     response = response or self.get_response(request)

2020-05-19T05:15:39.991767+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 36, in inner

2020-05-19T05:15:39.991768+00:00 app[web.1]:     response = response_for_exception(request, exc)

2020-05-19T05:15:39.991768+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception

2020-05-19T05:15:39.991768+00:00 app[web.1]:     response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

2020-05-19T05:15:39.991768+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner

2020-05-19T05:15:39.991769+00:00 app[web.1]:     response = get_response(request)

2020-05-19T05:15:39.991769+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/utils/deprecation.py", line 94, in __call__

2020-05-19T05:15:39.991769+00:00 app[web.1]:     response = response or self.get_response(request)

2020-05-19T05:15:39.991769+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 36, in inner

2020-05-19T05:15:39.991770+00:00 app[web.1]:     response = response_for_exception(request, exc)

2020-05-19T05:15:39.991770+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception

2020-05-19T05:15:39.991770+00:00 app[web.1]:     response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

2020-05-19T05:15:39.991771+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner

2020-05-19T05:15:39.991771+00:00 app[web.1]:     response = get_response(request)

2020-05-19T05:15:39.991771+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/whitenoise/middleware.py", line 58, in __call__

2020-05-19T05:15:39.991771+00:00 app[web.1]:     response = self.get_response(request)

2020-05-19T05:15:39.991772+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 36, in inner

2020-05-19T05:15:39.991772+00:00 app[web.1]:     response = response_for_exception(request, exc)

2020-05-19T05:15:39.991772+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 90, in response_for_exception

2020-05-19T05:15:39.991772+00:00 app[web.1]:     response = handle_uncaught_exception(request, get_resolver(get_urlconf()), sys.exc_info())

2020-05-19T05:15:39.991780+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner

2020-05-19T05:15:39.991781+00:00 app[web.1]:     response = get_response(request)

2020-05-19T05:15:39.991781+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/base.py", line 115, in _get_response

2020-05-19T05:15:39.991782+00:00 app[web.1]:     response = self.process_exception_by_middleware(e, request)

2020-05-19T05:15:39.991782+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/core/handlers/base.py", line 113, in _get_response

2020-05-19T05:15:39.991782+00:00 app[web.1]:     response = wrapped_callback(request, *callback_args, **callback_kwargs)

2020-05-19T05:15:39.991783+00:00 app[web.1]:   File "/app/builder/views.py", line 8, in home

2020-05-19T05:15:39.991783+00:00 app[web.1]:     return render(request, "builder/home.html")

2020-05-19T05:15:39.991783+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/shortcuts.py", line 19, in render

2020-05-19T05:15:39.991784+00:00 app[web.1]:     content = loader.render_to_string(template_name, context, request, using=using)

2020-05-19T05:15:39.991790+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/template/loader.py", line 62, in render_to_string

2020-05-19T05:15:39.991790+00:00 app[web.1]:     return template.render(context, request)

2020-05-19T05:15:39.991791+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/template/backends/django.py", line 61, in render

2020-05-19T05:15:39.991791+00:00 app[web.1]:     return self.template.render(context)

2020-05-19T05:15:39.991791+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/template/base.py", line 171, in render

2020-05-19T05:15:39.991792+00:00 app[web.1]:     return self._render(context)

2020-05-19T05:15:39.991792+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/template/base.py", line 163, in _render

2020-05-19T05:15:39.991792+00:00 app[web.1]:     return self.nodelist.render(context)

2020-05-19T05:15:39.991792+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/template/base.py", line 936, in render

2020-05-19T05:15:39.991793+00:00 app[web.1]:     bit = node.render_annotated(context)

2020-05-19T05:15:39.991793+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/template/base.py", line 903, in render_annotated

2020-05-19T05:15:39.991798+00:00 app[web.1]:     return self.render(context)

2020-05-19T05:15:39.991798+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/template/loader_tags.py", line 150, in render

2020-05-19T05:15:39.991798+00:00 app[web.1]:     return compiled_parent._render(context)

2020-05-19T05:15:39.991799+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/template/base.py", line 163, in _render

2020-05-19T05:15:39.991799+00:00 app[web.1]:     return self.nodelist.render(context)

2020-05-19T05:15:39.991799+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/template/base.py", line 936, in render

2020-05-19T05:15:39.991799+00:00 app[web.1]:     bit = node.render_annotated(context)

2020-05-19T05:15:39.991800+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/template/base.py", line 903, in render_annotated

2020-05-19T05:15:39.991800+00:00 app[web.1]:     return self.render(context)

2020-05-19T05:15:39.991800+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/templatetags/static.py", line 106, in render

2020-05-19T05:15:39.991800+00:00 app[web.1]:     url = self.url(context)

2020-05-19T05:15:39.991804+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/templatetags/static.py", line 103, in url

2020-05-19T05:15:39.991804+00:00 app[web.1]:     return self.handle_simple(path)

2020-05-19T05:15:39.991804+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/templatetags/static.py", line 118, in handle_simple

2020-05-19T05:15:39.991805+00:00 app[web.1]:     return staticfiles_storage.url(path)

2020-05-19T05:15:39.991805+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/staticfiles/storage.py", line 153, in url

2020-05-19T05:15:39.991805+00:00 app[web.1]:     return self._url(self.stored_name, name, force)

2020-05-19T05:15:39.991806+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/staticfiles/storage.py", line 132, in _url

2020-05-19T05:15:39.991806+00:00 app[web.1]:     hashed_name = hashed_name_func(*args)

2020-05-19T05:15:39.991806+00:00 app[web.1]:   File "/app/.heroku/python/lib/python3.6/site-packages/django/contrib/staticfiles/storage.py", line 423, in stored_name

2020-05-19T05:15:39.991806+00:00 app[web.1]:     raise ValueError("Missing staticfiles manifest entry for '%s'" % clean_name)

2020-05-19T05:15:39.991807+00:00 app[web.1]: ValueError: Missing staticfiles manifest entry for 'builder/logo.png'

2020-05-19T05:15:39.992027+00:00 app[web.1]: 10.95.191.28 - - [19/May/2020:05:15:39 +0000] "GET / HTTP/1.1" 500 0 "-" "-"

2020-05-19T05:15:40.192825+00:00 app[web.1]: 10.95.191.28 - - [19/May/2020:05:15:40 +0000] "GET /favicon.ico HTTP/1.1" 404 179 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0"

2020-05-19T05:15:39.996509+00:00 heroku[router]: at=info method=GET path="/" host=robotbuilder.herokuapp.com request_id=de877e93-558a-40ab-bf11-b6de261cb707 fwd="83.26.255.146" dyno=web.1 connect=1ms service=57ms status=500 bytes=244 protocol=http

EDIT2:

    import os
import django_heroku
from decouple import config
import dj_database_url

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/3.0/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = config('SECRET_KEY')

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = False

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'builder',
]

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',
    # Simplified static file serving.
    # https://warehouse.python.org/project/whitenoise/
    'whitenoise.middleware.WhiteNoiseMiddleware',
]

ROOT_URLCONF = 'robot_builder.urls'

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',
            ],
        },
    },
]

WSGI_APPLICATION = 'robot_builder.wsgi.application'


# Database
# https://docs.djangoproject.com/en/3.0/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
    }
}
# If you want to work with your remote database on your local machine, you need to paste link from heroku lower:
# DATABASES['default'] = dj_database_url.config(default='postgres://qkwlkrkahynyik:21a1420ab5820795f3a0c736ebb607419fc7a111f093924dcfc4567dfd906b9f@ec2-54-147-209-121.compute-1.amazonaws.com:5432/d2v01dp40p4er2')

db_from_env = dj_database_url.config(conn_max_age=600)
DATABASES['default'].update(db_from_env)

# Password validation
# https://docs.djangoproject.com/en/3.0/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/3.0/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.0/howto/static-files/

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


# Simplified static file serving.
# https://warehouse.python.org/project/whitenoise/
STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'


 # Debugging in heroku live
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'verbose': {
            'format': ('%(asctime)s [%(process)d] [%(levelname)s] ' +
                       'pathname=%(pathname)s lineno=%(lineno)s ' +
                       'funcname=%(funcName)s %(message)s'),
            'datefmt': '%Y-%m-%d %H:%M:%S'
        },
        'simple': {
            'format': '%(levelname)s %(message)s'
        }
    },
    'handlers': {
        'null': {
            'level': 'DEBUG',
            'class': 'logging.NullHandler',
        },
        'console': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',
            'formatter': 'verbose'
        }
    },
    'loggers': {
        'testlogger': {
            'handlers': ['console'],
            'level': 'INFO',
        }
    }
}

DEBUG_PROPAGATE_EXCEPTIONS = True
COMPRESS_ENABLED = os.environ.get('COMPRESS_ENABLED', False)


# Activate Django-Heroku.
django_heroku.settings(locals())

My folder structure:

robot_builder
    > builder
        >> migrations
        >> static
            >>> css
            >>> builder
                >>>> my images, including logo.png used as favicon
        >> templates
        >> models.py etc.
    > media
    > robot_builder
        >> settings.py etc.
    > staticfiles

Answer 1

I think I got it. The solution is working. But I think that it's also very weird. I would appreciate if someone could comment why is it like that.

You can leave whitenoise, you can make a little bit tidying up with static files dirs. Make it look like that:

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


STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage'

But it isn't necessary I think. (It is also best to keep your "static" folder in your main project folder).

But The big fix is (working on django 3):

You need to run

python manage.py collectstatic

Locally ! And then submit it to heroku. And then, everything is working with Debug set to False. I tried to keep collectstatic just with .keep file. I tried to commit only .json hoping that it will be repopulated with new collectstatic files. But no. It is working only if I run collectstatic locally and then commit EVERYTHING to heroku.

If someone have more understanding of this issue and could explain it to me I would be really grateful.

In the mean time I hope that someone else will also benefit from this solution.

I found answer on this question - ValueError: Missing staticfiles manifest entry for 'favicon.ico' . Thank you very much emazzotta, also I didn't have to get rid of whitenoise and It is working in django3.

Answer 2

Debug your django app by logs by typing this, heroku logs --tail -a your_herokuapp_name or https://dashboard.heroku.com/apps/your_herokuapp_name/logs.

Before that add this in your settings.py:

 # Debugging in heroku live
LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'formatters': {
        'verbose': {
            'format': ('%(asctime)s [%(process)d] [%(levelname)s] ' +
                       'pathname=%(pathname)s lineno=%(lineno)s ' +
                       'funcname=%(funcName)s %(message)s'),
            'datefmt': '%Y-%m-%d %H:%M:%S'
        },
        'simple': {
            'format': '%(levelname)s %(message)s'
        }
    },
    'handlers': {
        'null': {
            'level': 'DEBUG',
            'class': 'logging.NullHandler',
        },
        'console': {
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',
            'formatter': 'verbose'
        }
    },
    'loggers': {
        'testlogger': {
            'handlers': ['console'],
            'level': 'INFO',
        }
    }
}

DEBUG_PROPAGATE_EXCEPTIONS = True
COMPRESS_ENABLED = os.environ.get('COMPRESS_ENABLED', False)

This will show you error with debug=False in heroku logs.

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