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Editorial Team
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Asked: 2026-05-22T02:24:09+00:00

when an user click on my display link, it goes to my display page,

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when an user click on my display link, it goes to my display page, a javascript runs after the page load and render the display. something like below:

...
display_data_hash = {}

function display() {
// use display_data_hash here
}
...

is it possible to populate “display_data_hash” in my javascript on the server side? or should i just add tag to my view and populate display_data_hash inside my html. i really don’t want mix javascript with html.

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1 Answer

  1. Editorial Team

    First approach using AJAX

    you could retrieve your display_data_hash using AJAX (jQuery here) like:

    $.getJSON('/yourcontroller/youraction.json', function(data) {

   display(data);

});

    and in your controller you render a json response like:

    class YourController < ApplicationController
   def your_display_action

      @my_data = .....

      respond_to do |format|
        format.json{ render :json => @my_data }
      end
   end
end

    Second Approach without AJAX

    If you don’t want to fire an AJAX request you could do something like:

    In your layout view add a section:

    <html>
<head>
....
<script type="text/javascript">
    <%= yield :inline_js %>
</script>
....
</head>
<body>
....
</body>
</html>

    then create a helper method like:

    def insert_display_data(display_data) {

  # convert hash to json
  data_json = display_data.to_json

  content_for :inline_js do
     "display('#{data_json}');"
  end
}

    and in your display JavaScript function do:

    function display(data) {

  if(data instanceof String) { 
     // parse JSON using jquery
     data = $.parseJSON(data);
  }

  // your code...
}
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