sqlalchemy - Alembic Django Flask migrate database -


i have database shared between django , flask.

in flask app, use sqlalchemy , use alembic migrate database. when migrate database , use command:

$ alembic revision --autogenerate -m "some message"

it automatically remove tables django had created:

info  [alembic.migration] context impl mysqlimpl. info  [alembic.migration] assume non-transactional ddl. info  [alembic.autogenerate] detected removed table u'django_content_type' info  [alembic.autogenerate] detected removed table u'auth_group' info  [alembic.autogenerate] detected removed table u'auth_user' info  [alembic.autogenerate] detected removed table u'auth_user_groups' info  [alembic.autogenerate] detected removed table u'django_session' info  [alembic.autogenerate] detected removed table u'auth_permission' info  [alembic.autogenerate] detected removed table u'auth_user_user_permissions' info  [alembic.autogenerate] detected removed table u'account_userprofile' info  [alembic.autogenerate] detected removed table u'south_migrationhistory' info  [alembic.autogenerate] detected removed table u'django_site'

how configure alembic database migration not remove tables of django?

i resolved problem self:

in env file, function:

def run_migrations_online():     target_metadata.reflect(engine, only=[ "django_content_type", "auth_group", ...])

put tables here. define engine tables existed , not drop them.


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