Add a --preview option to upgrade/downgrade commands to list the migrations that will be applied

[eliasdorneles]

What do you think about adding a --preview option to the commands alembic upgrade and alembic downgrade to list the migrations that would be applied?

Right now, if I want to know what will happen if I run alembic upgrade, I have to run alembic history -i and "calculate" it in my head.

It would be super handy to have a --preview option.

[zzzeek]

--sql option? you mean you just want to show the revision identifiers. You can do "alembic history -r current:head" right now, hows that?

[zzzeek]

https://alembic.sqlalchemy.org/en/latest/tutorial.html?highlight=range#viewing-history-ranges

[eliasdorneles]

Ahh yes, thank you, alembic history -r current:head does what i want!!
Okay, I think I really need to give it a closer read at the documentation! 😅