What is the best way of storing session geolocation results from an IP using rails? -

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i'm working on location based app , i'd store location of user ip address in rails. i'm using geokit , i'm able location via ip of user i'm wondering best way store information without storing database (so first time/unregistered users can benefit location features without being registered/logged in).

the best example can give how groupon or livingsocial "know" first time visit apps. location via ip , store in session. best way? if so, how go using rails/geokit?

let me know if need more info. thanks!

is there reason can't push user session , refer in absence of registration? create caching table associates physical ips locations , refer well.


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