Rails: asynchronous pusher clientside initialisation snippet

_client_.coffee

# ... somewhere in your Backbone app init function, after initialising the "@things" collection:
  pusher_async pusher_or_key, (pusher)=>
    pusher.connection.bind 'connected', => @things.fetch()
    new Backpusher pusher.subscribe(channel), @things
# ... where channel's value is being rendered in the caller template like this:
  "#{ENV['FAKE_PUSHER']? PusherFake.javascript : Pusher.key.to_json}"