current_location.rb

  def current_location
    geoip = GeoIP.new('GeoLiteCity.dat').city(self.ip)
    if defined? geoip and geoip
      self.latitude = geoip.latitude
      self.longitude = geoip.longitude
      if latitude and longitude
        geocoder = Geocoder.search("#{latitude}, #{longitude}").first
        if geocoder and geocoder.formatted_address
          self.address = geocoder.formatted_address
        end
      end
    end
    get_zip if self.zip_code.nil?
  end