Add http(s) to URL if it's not there?

Question

I\'m using this regex in my model to validate an URL submitted by the user. I don\'t want to force the user to type the http part, but would like to add it myself if it\'s n

Answer 1

The accepted answer is quite okay. But if the field (url) is optional, it may raise an error such as undefined method + for nil class. The following should resolve that:

def smart_add_url_protocol
  if self.url && !url_protocol_present?
    self.url = "http://#{self.url}"
  end
end

def url_protocol_present?
  self.url[/\Ahttp:\/\//] || self.url[/\Ahttps:\/\//]
end