I'm seeing collisions between tempids generated by the transactor, and tempids generated by my process. I understand why it happens, but it is a scary trap to fall into.

I could do something like this:

(some #(when (even? (:idx %)) %)
        (repeatedly #(d/tempid :db.part/user)))

and replace even? with odd? on the transactor

but is that really the best way to do it?