On Thu, Mar 5, 2020, at 8:08 AM, Daniel Cardin wrote:
> I am attempting to write a library which invokes alembic commands, while
> referencing the migrations of a separate package which has installed said
> library.
>
> The intent here, is for the library to invoke the alembic commands with an
> env.py defined in that package. This seems to work through
> config.get("script_location", "package_name:foldername")
> but then obviously expects the actual migrations to be colocated at the same
> location.
>
> My guess would be, if this is possible at all, that there'd be something I
> could put in the env.py which would reconfigure it to execute the
> `context.run_migrations()` migration context (and therefore search path, back
> at the original call site.
>
> I realize that this won't always work, given that env.py is often likely
> customized enough such that a generic one wouldn't be able to execute them,
> but per your cookbook suggestions about programmatic invocation of commands,
> this sort of thing requires the user to opt into changing their env.py to use
> connectable = context.config.attributes.get("connection", None)
> in order to make use of a connection handed to it.
I'm not following all the moving pieces here, like when you say "commands", i
assume you mean the commands in alembic.command, , like
alembic.command.upgrade(). when you say "an env.py defined in that package", I
guess you mean in the separate package that is using your library.
this doesn't seem different from what Alembic itself does, "that package" would
have a directory where the env.py and its migration files are present? So...
I'm not really sure what you're trying to do beyond call an Alembic command
that is against a particular directory.
if OTOH by "commands" you mean migration operations, like you want to call
op.create_table() yourself, OK, but I don't really understand enough to
formulate an answer for you.
>
> --
> You received this message because you are subscribed to the Google Groups
> "sqlalchemy-alembic" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to sqlalchemy-alembic+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/sqlalchemy-alembic/5612f1d1-9e93-46ed-9be7-0db362b815a8%40googlegroups.com
>
> <https://groups.google.com/d/msgid/sqlalchemy-alembic/5612f1d1-9e93-46ed-9be7-0db362b815a8%40googlegroups.com?utm_medium=email&utm_source=footer>.
--
You received this message because you are subscribed to the Google Groups
"sqlalchemy-alembic" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to sqlalchemy-alembic+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/sqlalchemy-alembic/68640cf0-9297-4a55-9c26-7c54d7edae62%40www.fastmail.com.
