 
   @fetchRandomUsers = (callback)-> JAccount.some {}, {limit:10}, callback
 
-  @fetchRandomTopics = (callback)-> JTag.some {}, {limit:10}, callback
+  @fetchRandomTopics = (callback)->
+    {select: selector} = nameMapping.topic
+    JTag.some selector, {limit:10}, callback
 
   @_fetchUsers = (options={}, callback)->
     {client}   = options

    topic   :
      klass : JTag
      as    : ["developer", "follower", "post"]

  # Returns topics in following order:
  #   * Active topics in the last day

    [callback, options] = [options, callback]  unless callback
    {name, nin} = options
    mapping     = nameMapping[name]
    {klass, as, select} = mapping

    greater = (new Date(Date.now() - 1000*60*60*24))

