Index with jsonb and int8?

[mahdiyari]

I have read that rum can help with my problem but I can't actually see how.

I'm trying to create a jsonb_path_ops GIN index on a JSONB field and be able to also have sorting by another int8 column. I read that RUM can help with soring in multi column GIN indexes but I guess that wasn't including jsonb since I wasn't able to create an index or find any information.

Sorry, I had to ask somewhere.