pg_search: :associated_against queries don't use indexes

Hi fellows,

I’ve created a couple of gin indexes to speed up my pg_search scopes. All works fine and the generated queries use the indexes if I do simple against (Ex. :against => :load_number,).

But as soon as I add :associated_against indexes don’t get used anymore (or at least this is what postgres explain shows)

I do have indexes on the table/column that show in :associated_against

Any ideas what is going on here?

Regards,