Alembic trying to delete my tables

Question

Alembic beginner here. I'm having some issues with Alembic trying to delete my tables that are already created. I have no idea what is going on. Right now I have a database that looks like this:

If I run alembic upgrade head, I get this as my result:

INFO  [alembic.runtime.migration] Context impl PostgresqlImpl.
INFO  [alembic.runtime.migration] Will assume transactional DDL.

If I run alembic history, I get this result, which is correct:

c2659db918a9 -> 765c30f7078c (head), creat table views
c4a0cac54f89 -> c2659db918a9, Made last_update not null for all tables
19dd9f3d1d16 -> c4a0cac54f89, Added last_update field defaulted to now
77c03ebb393b -> 19dd9f3d1d16, Added indexes to each table
0737825277d8 -> 77c03ebb393b, Change foreign key columns to non-nullable
5eb3c5f7f599 -> 0737825277d8, Rename a column in daily_etf_underlying table
0da0b2a43172 -> 5eb3c5f7f599, Add extra_info column to daily_etf_underlying
c181fe8bcfa9 -> 0da0b2a43172, Make daily_etf id columns nullable
8fba2675104b -> c181fe8bcfa9, added fixing table
074563d69c3b -> 8fba2675104b, Modify daily_etf tables
2c9de57e43f0 -> 074563d69c3b, Add fund_family columns
80de6fb0a104 -> 2c9de57e43f0, Modify daily_etf table
a970af9bb117 -> 80de6fb0a104, Add daily_etf_basket, daily_etf_fx_forward tables
 -> a970af9bb117, Add daily_etf table

But if I run alembic revision --autogenerate -m "<>", I get this!

alembic revision --autogenerate -m "Raw fidessa client trade table"
INFO  [alembic.runtime.migration] Context impl PostgresqlImpl.
INFO  [alembic.runtime.migration] Will assume transactional DDL.
INFO  [alembic.ddl.postgresql] Detected sequence named 'daily_etf_fx_forward_id_seq' as owned by integer column 'daily_etf_fx_forward(id)', assuming SERIAL and omitting
INFO  [alembic.autogenerate.compare] Detected removed table 'daily_etf_fx_forward'
INFO  [alembic.autogenerate.compare] Detected removed table 'daily_etf'
INFO  [alembic.ddl.postgresql] Detected sequence named 'daily_fx_fixing_rate_id_seq' as owned by integer column 'daily_fx_fixing_rate(id)', assuming SERIAL and omitting
INFO  [alembic.autogenerate.compare] Detected removed table 'daily_fx_fixing_rate'
INFO  [alembic.ddl.postgresql] Detected sequence named 'daily_etf_underlying_id_seq' as owned by integer column 'daily_etf_underlying(id)', assuming SERIAL and omitting
INFO  [alembic.autogenerate.compare] Detected removed table 'daily_etf_underlying'
Generating C:\dev\Projects\stark_database\stark_database\migrations\versions\86174c06e59e_raw_fidessa_client_trade_table.py ... done

And my autogenerated file is just trying to remove all my tables :(

def upgrade():
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_table('daily_fx_fixing_rate')
    op.drop_table('daily_etf_underlying')
    op.drop_table('daily_etf')
    op.drop_table('daily_etf_fx_forward')
    # ### end Alembic commands ###

What is going on here? Why is alembic trying to delete everything?

Thanks for your help.

EDIT: alembic.ini:

[alembic]
script_location = migrations
sqlalchemy.url = postgresql://stark_admin:hpt@localhost/stark

env.py is exactly textbook to alembic init alembic

Alembic trying to delete my tables

1 Answers