Is it possible to replace one marker using gmaps4rails?

Question

Using Gmaps.map.replaceMarkers() I can replace entire marker set. But in my application I will use more than 3000 markers.

How to replace one marker or subset of markers?

Answer 1

This is definitely possible but because there is no rule, there is custom code to write.

Here is how I proceed generally:

• I add some custom data in the marker's json, the id of the active record's object generally

• I sort my markers client side in javascript variables, say you have the ids of markers you want to remove in a js array called toClear

• I remove useless markers:

Coffeescript:

for marker in Gmaps.map.markers
  if marker.id in toClear
    Gmaps.map.clearMarker marker

• I add the new one Gmaps.addMarkers new_markers_array