I'm implementing a reputation system similar to reddit on a personal project, and have a time decay formula I'm wanting to use for it. I'm wondering:
are you able to use a time-based decay formula for weighting within the activerecord reputation system? the examples I've seen show simple weighting like ":weight => 0.8"
if not, how should I store and update those values? I obviously don't want to run that calculation on every record on every request, but it needs to update itself fairly frequently. what's the best approach for doing that?
UPDATE: the formula I'm trying to use:
time_diff = ((Time.now - @item.created_at) / 3600).round
score = (@item.reputation_for(:votes).to_i) / (time_diff + 2)**1.5
