Backbone fetch limiting.

gistfile1.coffee

#define @fetch in your initializer.

fetch: (options) ->
    options.success = =>
      @fetching[@url] = undefined
    options.error = =>
      @fetching[@url] = undefined
    if JSON.stringify(@fetching[@url]) == JSON.stringify(options)
      console.log "old fetch in progress for #{@url}"
    else
      console.log "Going to fetch for #{@url}"
      @fetching[@url] = options
      super options