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YM4R Configuration With Multiple Domains
Need to put domains in config/gmaps_api_key.yml
production: host.com: longapikeythatmakesnosense anotherhost.com: jsdkfljskfljsgklsjgkl
When printing out the header information you need to pass the param :host. request.host should do the job.
<%= GMap.header(:host => request.host) %>