How to validate text input so that it only allows a-z, A-Z, 0-9, ();:?!,.[]{}- characters(also space) and in Rails?

Question

How to validate text input so that it only allows a-z, A-Z, 0-9, ();:?!,.[]{}- characters(also space)?

I added something like in my model

class Oder < ApplicationRecord
   ......
   ......
   validates :text, presence: true, format: { with: /[0-9\w]*[\(\;\:\-\?\!\,\.\[\]\{\}\,\.)]*/ }
   ......
 end
end

But it is not working. It allows other characters(wïth ûmlauts) also. Thanks in advance.

Answer 1

At the moment the regexp matches when one or more characters are in your text somewhere. You need to change the regexp to only match when the characters are the only characters between the start of the string (\A) and its end (\z).

Change your regexp to:

/\A[0-9\w\s\(\;\:\-\?\!\,\.\[\]\{\}\,\.)]*\z/

Answer 2

validates_format_of :text, without: /[-0-9\w ;:,.?!\[\]{}()]*/