<FromGitter>
<anamba> for now, i'm just doing `optional(:age) { true }`
<FromGitter>
<anamba> also i must be missing something, but when the params don't validate, how do i get a copy of the invalid params anyway, so that the user doesn't have to input everything again from scratch? for now, to make it work, i created a duplicate call to `params.validate` with all params set to `optional { true }`.