Saving google map polygon as rails record - google-maps

Question

As rails 3.2.18 postGIS enabled application needs to capture polygon data from google maps API.
The js is as follows:
var poly, map;
var markers = [];
var path = new google.maps.MVCArray;
function initialize() {
var roma = new google.maps.LatLng(41.877, 12.480);
map = new google.maps.Map(document.getElementById("map"), {
zoom: 7,
center: roma,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
poly = new google.maps.Polygon({
strokeWeight: 3,
fillColor: '#5555FF'
});
poly.setMap(map);
poly.setPaths(new google.maps.MVCArray([path]));
google.maps.event.addListener(map, 'click', addPoint);
}
function addPoint(event) {
path.insertAt(path.length, event.latLng);
var marker = new google.maps.Marker({
position: event.latLng,
map: map,
draggable: true
});
markers.push(marker);
marker.setTitle("#" + path.length);
google.maps.event.addListener(marker, 'click', function() {
marker.setMap(null);
for (var i = 0, I = markers.length; i < I && markers[i] != marker; ++i);
markers.splice(i, 1);
path.removeAt(i);
}
);
google.maps.event.addListener(marker, 'dragend', function() {
for (var i = 0, I = markers.length; i < I && markers[i] != marker; ++i);
path.setAt(i, marker.getPosition());
}
);
}
While the map generates the polygon, I would like to, in a first instance view the LatLng points (to track what is being generated), but ultimately save the points.
A first issue is LatLng (Google) vs Lon/Lat (PostGIS). While there is always the possibility of flipping the data, I'd just assume avoid it. THis would imply some parsing of the data.
So how can the polygon points get captured to the database, individually or as a LonLat-formatted polygon? [Bear in mind I'm really not proficient in js...]

Answer 1

I'd probably want to make an AJAX request to a ruby script that would then save the details to the DB. You can access the individual latitude and longitude values from your event like so:
event.latLng.lat()
event.latLng.lng()
Or indeed use the lat() and lng() functions on anything that returns a LatLng object. See the docs: https://developers.google.com/maps/documentation/javascript/reference#LatLng