Encrypted ID in URLs

Posted by Eric on Stack Overflow See other posts from Stack Overflow or by Eric
Published on 2010-03-15T19:17:16Z Indexed on 2010/03/15 19:19 UTC
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ruby-on-rails

I am trying to hash or encrypt a record's ID for URL's such that people can't view various records simply by guessing different integer ID's.

Essentially, my URL's would be something like this: /plans/0AUTxwoGkOYfiZGd2 instead of /plans/304.

Would the best way to do this just be to use SHA-1 to hash the plan's id and store it in a hashed_id column for plans? Then, overwrite to_param and add a finder to find by hashed_id?

How do you ensure that the characters generated are 0-9, a-z, or A-Z?

Thanks!

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