Answers for "how to clear a database in migration in deployment on django postgresql"

delete all migrations django

### Source: https://simpleisbetterthancomplex.com/tutorial/2016/07/26/how-to-reset-migrations.html

# Delete migrations
find . -path "*/migrations/*.py" -not -name "__init__.py" -delete
find . -path "*/migrations/*.pyc"  -delete

# Drop database
# (delete db.sqlite3 or see https://stackoverflow.com/questions/34576004/simple-way-to-reset-django-postgresql-database

# Create migrations and generate DB schema
./manage.py makemigrations
./manage.py migrate