app/validators/invalid_url_chars_validator.rb

   1 class InvalidUrlCharsValidator < ActiveModel::EachValidator
   2   INVALID_URL_CHARS = "/;.,?%#".freeze
   3
   4   def validate_each(record, attribute, value)
   5     record.errors[attribute] << (options[:message] || I18n.t("validations.invalid chars", :invalid_chars => INVALID_URL_CHARS)) if value =~ /[#{INVALID_URL_CHARS}]/
   6   end
   7 end