def show
@item = Item.find(params[:id])
respond_to do |format|
  format.html
  format.js { render 'show.js.erb' }
end
@hash = Gmaps4rails.build_markers(@item) do |item, marker|
  marker.lat item.latitude
  marker.lng item.longitude
  marker.picture({
                     :url => "https://www.google.com/mapfiles/dd-end.png",
                     :width   => 32,
                     :height  => 32
                 })
  marker.infowindow render_to_string(:partial => 'pages/info_page')
end
append_cur_location
end

# method to show current location marker on goggle maps
def append_cur_location
@hash << {
    :lat=>action[0],
    :lng=>action[1],
    :picture=> {
        :url=> "https://www.google.com/mapfiles/dd-start.png",
        :width=>  32,
        :height=> 32
        }
    }
  end

#method that gets html5 geolocation cookies and splits it
def action
  @lat_lng = cookies[:lat_lng].split("|") unless cookies[:lat_lng] == nil
end

<div id="map"></div>

<script>
handler = Gmaps.build('Google');
handler.buildMap({ provider: {}, internal: {id: 'map'}}, function(){
    markers = handler.addMarkers(<%=raw @hash.to_json %>);
    handler.bounds.extendWith(markers);
    handler.fitMapToBounds();
    handler.getMap().setZoom(15);
});
</script>

<script>
var handler = Gmaps.build('Google');
handler.buildMap({ internal: {id: 'map'}}, function(){

    var start_point = [43.2423, 5.323452];
    var end_point   = [44.2423, 5.323452];

    var directionsService = new google.maps.DirectionsService();
    var directionsDisplay = new google.maps.DirectionsRenderer();

    directionsDisplay.setMap(handler.getMap());
    var request = {
        origin:      new google.maps.LatLng(start_point[0], start_point[1]),
        destination: new google.maps.LatLng(end_point[0], end_point[1]),
        travelMode:  google.maps.TravelMode.DRIVING
    };

    directionsService.route(request, function(response, status) {
        if (status === google.maps.DirectionsStatus.OK) {
            directionsDisplay.setDirections(response);
        }
    });
});

</script>