Thanks.

I knew I was missing something.

So if I follow jeffa's suggestion of merging the sessions and sessions_metadata tables so that I have a single sessions table with a (non-primary-key) foreign key to the users table then all should be fluffy and I can stop banging my head off the desk...?

...or I could use might_have, which works fine. Sigh. that'll teach me to read docs properly...

Cheers guys,

Cxx