Ruby validator with Regex is not working

Question

Hi I have a ruby regex I made usinig Rubular http://rubular.com/r/RRc8twB6NL which is meant to check for a decimal 10.00 for pricing. I get it to work on Rubular, but in my application this code does not work:

validates_format_of :price, :with=>/^([0-9]{1,}\.{0,}[0-9]{0,2})$/

Thanks for any help

Your regular expression (which could be rewritten as /^\d+\.*\d?\d?/) matches any string consisting of 3 or more digits and any string consisting of 1 or more digits, then some dots and then 0 to 2 digits (any string containing such a line, in fact). This includes "0007", "0...." and other non-prices. What do you really want to validate? — michael_wu
– michael_wu, Commented Aug 27, 2011 at 1:36
@undur_gongor I just wanted to validate that it would be in format of a price such as $1.00, $10.00, $200.00, etc. — Travis Pessetto
– Travis Pessetto, Commented Aug 30, 2011 at 1:59

michael_wu · Accepted Answer · 2011-08-30 07:42:37Z

1

In case you only want to have prices with one digit and then zeros you need the regex

/\A[1-9]0*\.\d\d\z/

If any number is allowed before the decimal dot it is

/\A[1-9]\d*\.\d\d\z/

If the fraction part is optional it is either of

/\A[1-9]0*(\.\d\d)?\z/
/\A[1-9]\d*(\.\d\d)?\z/

If you want to allow for the dollar sign (maybe with spaces in between) it is either of

/\A(\$\s*)?[1-9]0*\.\d\d\z/
/\A(\$\s*)?[1-9]\d*\.\d\d\z/
/\A(\$\s*)?[1-9]0*(\.\d\d)?\z/
/\A(\$\s*)?[1-9]\d*(\.\d\d)?\z/

answered Aug 30, 2011 at 7:42

michael_wu

16k5 gold badges66 silver badges77 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Peter DeWeese · Accepted Answer · 2012-08-03 13:07:13Z

0

To check for 10.00:

/^10\.00$/

To check for 10.00 - 99.99:

/^[1-9]\d\.\d{2}$/

edited Aug 3, 2012 at 13:07

Peter DeWeese

18.4k8 gold badges83 silver badges104 bronze badges

answered Aug 26, 2011 at 18:26

zellio

32.8k1 gold badge46 silver badges64 bronze badges

Collectives™ on Stack Overflow

Ruby validator with Regex is not working

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related