Google Maps in Ruby on Rails
Comments (31) To generate google maps in ruby on rails is so easy and simple. I had recently generated a few maps in my projects by YM4R/GM plugin.
Note: to support rails 3 application, certain changes are required in plugin. Those changes listed out here
There are few steps that you need to follow to generate simple gmap.
1. Install YM4R/GM plugin in your rails app.
ruby script/plugin install svn://rubyforge.org/var/svn/ym4r/Plugins/GM/trunk/ym4r_gm
2. Copy the javascripts files from YM4R/GM plugin to public/javascript folder
3. Copy the gmaps_api_key.yml.example file to config folder and rename to gmaps_api_key.yml. Set the api key in that YML file.
If application is in development mode then no necessary to change it.
4. Add below code in your controller.
def gmap
@map = GMap.new("map_div")
@map.control_init(:large_map => true,:map_type => true)
@map.center_zoom_init([22.792388,79.497070],4)
@map.overlay_init(GMarker.new([22.792388,79.497070],:title =>"India", :info_window =>"India"))
@map.record_init @map.add_overlay(GMarker.new([22.792388, 72.421875],:title =>"Ahmedabad", :info_window =>"Ahmedabad"))
end
#control_init : By default false.
:large_map: true means you can get options of zoom in /zoom out of map on left side of map.
:map_type: true means you can change the type of map.
#center_zoom_init: Set the center point of map.
#overlay_init: Mark the position on map.
#record_init @map.add_overlay: Mark more position on map.
5. Add below code in your view.
<html><head><title>Test</title> <%= GMap.header %> <%= @map.to_html %> </head><body> <%= @map.div(:width => 600, :height => 400) %> </body></html>
#You will get following output
Themocracy