ruby on rails - How to pass values from controller to javascript? -

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my controller queries database , organizes values. need pass these values javascript(jquery) use values fullfill ui features. how pass values controller javascript???

  1. pass data through view.
  2. use ajax. pass need respond_to block, or through rjs file
  3. organize comet server. , push javascript right controllers. (for example, http://juggernaut.rubyforge.org/)

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