maxZoom undefined in markerclusterer_compiled.js

[hameno]

Hi I'm trying to display some markers but since a few days I'm getting this error and no markers are shown:

markerclusterer_compiled.js:1  Uncaught TypeError: Cannot read property 'maxZoom' of undefined

My gem version: gmaps4rails (1.1.5)

[apneadiving]

Hi,

That's annoying.. I'll try today...

What's your code please?

[hameno]

I'm currently on the way to work. Code is nothing special, will post it when I'm at work.

[eetteri]

Same problem started to occur to me too suddenly. Problem is in the google utility library markerclusterer.js. I'm getting the error below when creating the map

markerclusterer.js:90TypeError: 'undefined' is not an object (evaluating 'that.map_.mapTypes[that.map_.getMapTypeId()].maxZoom')

and the related js

// Add the map event listeners
  var that = this;
  google.maps.event.addListener(this.map_, 'zoom_changed', function() {
    var maxZoom = that.map_.mapTypes[that.map_.getMapTypeId()].maxZoom;
    var zoom = that.map_.getZoom();
    if (zoom < 0 || zoom > maxZoom) {
      return;
    }

While looking at this, I noticed that google utility library has markerclustererplus, which is backward compatible with the version 1.0 and when I tried it, it solved the above problem but also another problem I was having when using gmap4rails replaceMarkers() call on AJAX updates. Any change to move to that library?

[hameno]

So here's the code:

<%= gmaps({
    :map_options => { :detect_location => false, :center_on_user => false, :zoom => 6},
    :markers => { :data => @json },
    :polylines => { :data => @line_json , :options => { :strokeColor => "#000" }},
    :circles    => { :data => @circles_json }
    }) %>

Controller:

@routes = current_user.routes
@route = @routes.find(params[:id])
routepoints = @route.route_points.order("fixed_at ASC")
points = Array.new
lines = Array.new
circles = Array.new
routepoints.each do |rp|
  points << rp
  circles << { "lng" => rp.longitude, "lat" => rp.latitude, "radius" => rp.accuracy }
end
0.upto(points.length-2) do |i|
  line = Array.new
  line << {"lat" => points[i].latitude, "lng" => points[i].longitude}
  line << {"lat" => points[i+1].latitude, "lng" => points[i+1].longitude}
  lines << line
end

logger.info points
@json = points.to_gmaps4rails
@line_json = lines.to_json
@circles_json = circles.to_json

(It's certainly not very clean or good code - just starting with ruby and rails)

[eetteri]

Well, the problem is definitely on googles utility library end, all their examples are broken also

[apneadiving]

@eetteri:

Ok sounds like a problem unrelated to the gem then.

I'll move to markerClustererPlus in a release tonight.

Thanks for the tip

[hdkmraf]

Seems like this is related to the problem: http://groups.google.com/group/google-maps-js-api-v3/browse_thread/thread/703b11a00d964c4e

"The function hasn't been exported for compiling. I can export it if needed but you can set the maxZoom in the options when you create the object:

var mymarkerclusterer = new MarkerClusterer(map, null, { maxZoom: 11

}); "

[hdkmraf]

Yep, the problem was markerClusterer

Replaced:

<script type="text/javascript" src="http://google-maps-utility-library-v3.googlecode.com/svn/tags/markerclusterer/1.0/src/markerclusterer_compiled.js"></script>

for:

<script type="text/javascript" src="http://google-maps-utility-library-v3.googlecode.com/svn/tags/markerclustererplus/2.0.1/src/markerclusterer.js"></script>

in app/views/gmaps4rails/_gmaps4rails.html.erb

and it is rolling again!

Thanks!

[apneadiving]

Few things here:

1. I'm impressed by the reactivity of you all: answer came really quickly. Big thanks :)
2. No bug for me but since the other script works fine too, I'll replace the former.

Cheers!

[eetteri]

Yeah, you are right, the original 1.0 library seems to be working again. There definitely was something funky going on with that library earlier today as seen in Google Maps email group thread from this day

Thanks for the library upgrade anyway, since that solves another problem I just recently pumped into and had not been able to solve.