Rails - Feb 2007 - Ajax-based Google Map Not Updating

I am working on building a Google Map application that lets a user
search a database by clicking on several check boxes to filter
results.  I have attached an observe_form call that sends the selected
checkboxes to my controller.  The controller then searches the
database and re-renders the Google map (rendered as a partial).  The
map is rendered and I call the initialize method on the map again.

The issue I am having is that when I perform the new search and update
the map, it update the points that are on the map.

Any help is appreciated.

The search results code and RJS is here:

    @tutors = Tutor.find(:all, :conditions => ["work_lat !=
'''' and
work_long != '''' and id in (select tutor_id from
subjects_tutors where
subject_id in (#{@query}))"])

    respond_to do |format|
    format.js {
    render :update do |page|
      page.replace ''mapresults'', :partial =>
"map", :locals =>
{:tutors => @tutors}
      page.call "initialize"
    end
  }
end





Here''s the map rendering code:

<script type="text/javascript">
	if (window.addEventListener) {
		window.addEventListener("load", initialize, false);
	}

	function createMarker(point,html) {
		var marker1 = new GMarker(point);
		GEvent.addListener(marker1, "click", function() {
			marker1.openInfoWindowHtml(html);
		});

		return marker1;
	}

	function initialize() {
		var map = new GMap(document.getElementById("map"));
		map.addControl(new GSmallMapControl());

		<% unless params[:student_lat] and params[:student_long] %>
			map.centerAndZoom(new GPoint(-122.443882, 37.769079), 5);
		<% else %>
			map.centerAndZoom(new GPoint(<%= params[:student_long].to_f %>,
<%params[:student_lat].to_f %>), 5);
		<% end %>

		<% unless @tutors.size == 0 %>
			<% @tutors.each do |tutor|%>
				var point = new GPoint(<%=tutor[:work_long]%>,<%=tutor[:work_lat]
%>);
				var marker = createMarker(point,''<div><h3><%=
link_to
h(tutor[:first] + " " + tutor[:last]), edit_tutor_path(tutor) %>
</
h3><p><%= mail_to tutor.emails.primary.address %><br
/><%tutor.phones.primary.digits %><br
/><strong>Rating</strong>: <%tutor.rating %>/5
stars</p></div>'');
				map.addOverlay(marker);
			<% end %>
		<% end %>
	}

</script>

-
Justin Williams
Owner, Second Gear
http://secondgearllc.com/


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