Rails Custom URL validator

url_validator.rb

# Use this validator like this
#
# class User < ApplicationRecord 
#   validates :profile_link, url: true
# end 

class UrlValidator < ActiveModel::EachValidator
  def validate_each(record, attribute, value)
    unless valid_url?(value)
      record.errors.add(attribute, :invalid_url)
    end
  end

  private

  def valid_url?(url)
    uri = URI.parse(url)
    uri.is_a?(URI::HTTP) && !uri.host.nil?
  rescue URI::InvalidURIError
    false
  end
end