Run Django database migrations after deploy to Heroku. This file must live at `bin/post_compile` within your root project directory.

post_compile.sh

# !/usr/bin/env bash
# File path should be ./bin/post_compile
# (.sh extension added in Gist just to enable shell syntax highlighting.
# https://discussion.heroku.com/t/django-automaticlly-run-syncdb-and-migrations-after-heroku-deploy-with-a-buildpack-or-otherwise/466/7

echo "=> Performing database migrations..."
python manage.py migrate

I may state the obvious, but to help anyone who gets here looking to solve No such file or directory error…

Make sure you have LF line endings!

This solution may be outdated with the release option of the Procfile.

See StackOverflow answer or Heroku doc.

git push heroku ersatz-model:master 

(…)

remote: Compressing source files... done.
remote: Building source:
remote: 
remote: -----> Python app detected
remote:        Using supported version of Python 3.6 (python-3.6.6)
remote: -----> Installing requirements with pip
remote: 
remote: -----> $ python manage.py collectstatic --noinput
remote:        120 static files copied to '/tmp/…/staticfiles', 376 post-processed.
remote: 
remote: -----> Discovering process types
remote:        Procfile declares types -> release, web
remote: 
remote: -----> Compressing...
remote:        Done: 56.5M
remote: -----> Launching...
remote:  !     Release command declared: this new release will not be available until the command succeeds.
remote:        Released v41
remote:        https://….herokuapp.com/ deployed to Heroku
remote: 
remote: Verifying deploy... done.
remote: Running release command...
remote: 
remote: Operations to perform:
remote:   Apply all migrations: admin, auth, contenttypes, ersatz, sessions
remote: Running migrations:
remote:   Applying ersatz.0006_auto_20181020_0053... OK
remote: Waiting for release.... done.

i think you can just use the release command in your Procfile
for exemple to migrate :

release: python manage.py migrate
web: gunicorn django_proj.wsgi --log-file -

or runs a script :

release: ./ post_compile.sh
web: gunicorn django_proj.wsgi --log-file -

the command release runs after :

• A successful app build
• A change to the value of a config var (unless the config var is associated with an add-on)
• A pipeline promotion
• A rollback
• A release via the platform API
• Provisioning a new add-on

Just do:

release: python manage.py migrate --no-input
web: gunicorn project_name.wsgi

and you will be fine.