How heroku run python manage.py migrate?

Make sure you have committed migrations file. then run

heroku run python manage.py migrate

You can specify the app name in the following way:

heroku run python manage.py migrate -a <app-name>

Please see this documentation.

Either

heroku run python manage.py migrate

or

heroku run python3 manage.py migrate

If needed to specify app name:

heroku run python3 manage.py migrate -a <app-name>

Your migration files should be committed to your source control, and never run makemigrations on heroku.

With committed migration files, this problem becomes non existant.

The Heroku filesystem is read-only as per the documentation.

This means that when you disconnect from the dyno the files created by the makemigrations command will be destroyed.

To solve your issue you can:

1. Commit your migration files to Github(or your source control system) and then run the migrate command on the Heroku shell - recommended
2. Create the migration files and then run the migration on the heroku bash shell. - NOT RECOMMENDED on production