# Validation - Credit Card Validation **URL:** \ **Category:** Rails\ **Created:** [February 3, 2009, 9:47am UTC](https://www.ruby-forum.com/t/validation-credit-card-validation/159295 "2009-02-03T09:47:09Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![cyrus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ac91a4/32.png) [@cyrus](https://www.ruby-forum.com/u/cyrus)\ **Post date:** [February 3, 2009, 9:47am UTC](https://www.ruby-forum.com/t/validation-credit-card-validation/159295/1 "2009-02-03T09:47:09Z")
Hello Everyone any one know how to validate credit card information in rails ? please help me thanks in advance ---
**Author:** ![cyrus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ac91a4/32.png) [@cyrus](https://www.ruby-forum.com/u/cyrus)\ **Post date:** [February 3, 2009, 9:50am UTC](https://www.ruby-forum.com/t/validation-credit-card-validation/159295/2 "2009-02-03T09:50:11Z")
I doubt anyone will give step-by-step instructions but checkout active merchant gem. I’ve found the active merchant pdf in peepcode to be quite helpful. Ramon T. On Tue, Feb 3, 2009 at 4:47 PM, Cyrus D. ---
**Author:** ![cyrus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ac91a4/32.png) [@cyrus](https://www.ruby-forum.com/u/cyrus)\ **Post date:** [February 3, 2009, 10:01am UTC](https://www.ruby-forum.com/t/validation-credit-card-validation/159295/3 "2009-02-03T10:01:16Z")
Hello Thanks , is also do payment gateways processsing ? this plugin ? ---
**Author:** ![cyrus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ac91a4/32.png) [@cyrus](https://www.ruby-forum.com/u/cyrus)\ **Post date:** [February 3, 2009, 9:16pm UTC](https://www.ruby-forum.com/t/validation-credit-card-validation/159295/4 "2009-02-03T21:16:05Z")
Cyrus, You gotta check out Amy Hoy’s cheatsheet! [http://www.slash7.com/articles/2008/12/29/jump-start-credit-card-processing](http://www.slash7.com/articles/2008/12/29/jump-start-credit-card-processing) [http://jumpstartcc.com/](http://jumpstartcc.com/) Cheers, SAzima ---
**Author:** ![cyrus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ac91a4/32.png) [@cyrus](https://www.ruby-forum.com/u/cyrus)\ **Post date:** [February 3, 2009, 10:15pm UTC](https://www.ruby-forum.com/t/validation-credit-card-validation/159295/5 "2009-02-03T22:15:53Z")
Look at [Luhn algorithm - Wikipedia](http://en.wikipedia.org/wiki/Luhn_algorithm). It’s a good screen against flat-out invalid numbers. After that, it’s between you and your credit card payment acceptor. ---
**Author:** ![cyrus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ac91a4/32.png) [@cyrus](https://www.ruby-forum.com/u/cyrus)\ **Post date:** [February 3, 2009, 10:24pm UTC](https://www.ruby-forum.com/t/validation-credit-card-validation/159295/6 "2009-02-03T22:24:07Z")
active merchant comes w/ somr luhn javascript validation too On Tue, Feb 3, 2009 at 1:15 PM, s.ross [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > Hello Everyone > > > – Available for Ruby on Rails development opportunities ---
**Author:** ![cyrus](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ac91a4/32.png) [@cyrus](https://www.ruby-forum.com/u/cyrus)\ **Post date:** [February 3, 2009, 9:17pm UTC](https://www.ruby-forum.com/t/validation-credit-card-validation/159295/7 "2009-02-03T21:17:17Z")
yes active merchant does gateways and also paypal stuff (my usage so far). there is a very good cheat sheet on how to use it for gateways: [http://jumpstartcc.com/](http://jumpstartcc.com/) On Tue, Feb 3, 2009 at 1:01 AM, Cyrus D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)wrote: > Hello > > Thanks , is also do payment gateways processsing ? this plugin ? > > – > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/). > > > – Available for Ruby on Rails development opportunities