floating point precision in ruby on rails model validations

Posted by Chris Allison on Stack Overflow See other posts from Stack Overflow or by Chris Allison
Published on 2010-05-04T16:09:25Z Indexed on 2010/05/04 17:18 UTC
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ruby

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rails

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validation

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floating-point

Hello I am trying to validate a dollar amount using a regex: ^[0-9]+\.[0-9]{2}$

This works fine, but whenever a user submits the form and the dollar amount ends in 0(zero), ruby(or rails?) chops the 0 off. So 500.00 turns into 500.0 thus failing the regex validation.

Is there any way to make ruby/rails keep the format entered by the user, regardless of trailing zeros?

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