Rails/ActiveRecord/Postgres

Has anyone managed to get typeid-ruby and typeid-sql working with rails/activerecord/postgres?

Despite hours and hours of trying, I cannot get past this error:

```
PG::UndefinedFunction: ERROR:  operator is only a shell: character varying = typeid
LINE 1: ...rnal_metadata" WHERE "ar_internal_metadata"."key" = $1 LIMIT...
```