1//to create migration files
2python manage.py makemigrations
3
4//to migrate migration files
5python manage.py migrate
6
1$ python manage.py makemigrations && python manage.py migrate
2$ git add --all
3$ git commit -m "fixed migrate error"
4$ git push heroku master
5$ heroku run python manage.py makemigrations
6$ heroku run python manage.py migrate
7--- Done ___