ruby on rails - Regex to validate string having only characters (not special characters), blank spaces and numbers -

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i using ruby on rails 3.0.9 , validate string can have characters (not special characters - case insensitive), blank spaces , numbers.

in validation code have:

validates :name,   :presence   => true,   :format     => { :with => regex } # here should set 'regex'

how should state regex?

there couple ways of doing this. if want allow ascii word characters (no accented characters Ê or letters other alphabets Ӕ or ל), use this:

/^[a-za-z\d\s]*$/

if want allow numbers , letters other languages ruby 1.8.7, use this:

/^(?:[^\w_]|\s)*$/u

if want allow numbers , letters other languages ruby 1.9.x, use this:

^[\p{word}\w\s-]*$

also, if planning use 1.9.x regex unicode support in ruby on rails, add line @ beginning of .rb file:

# coding: utf-8

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