ruby hash calling through javascript

Question

Below file is in .html.erb i want to call mash again and again how i do it.I tried many times through setInterval but it getting old value of data.I am getting new value in mesh data.but when i see second time calling it takes old.

    <%

        mash = {
          "id" => id, "legends" => legends, "x_units" => x_units, "y_units" => y_units, "data" => data, "alertPoints" => alert_points, "time_mode" => time_mode, 
          "colors" => colors, "x_label" => x_label, "y_label" => y_label, "tipColors" => tipColors, "dateformat" => @dateformat, "timeformat" => @timeformat, 
          "chart_url" => chart_url, "x_label_date_format" => x_label_date_format, "turn_series" => turn_series, "y_ticks_array" => y_ticks_array, "y_label_width" => y_label_width,
          "series_type" => series_type,"vertical_threshold" => vertical_threshold, "x_label_suffix" => x_label_suffix, "y_tick_on" => y_tick_on, "xmin" => xmin, "xmax" => xmax
          }
        %>


            <script type="javascript">

                  setInterval(    function ()
                 {
                 onDataReceived(<%=mash.to_json.html_safe%>);



                 }, 5000);
              </script>

how are you fetching your data? What's your ajax callback like? Kinda hard to tell whats wrong without anymore details... — Abraham P
– Abraham P, Commented Feb 2, 2013 at 6:26
if use put command to see mash[data] it dynamically change.but <%=mash.to_json.html_safe%> it getting old value .can i call above mash again and again — aiyaz ahmad
– aiyaz ahmad, Commented Feb 2, 2013 at 6:40

Community · Accepted Answer · 2017-05-23 12:27:01Z

1

The issue is that mash is evaluated once when the page is rendered, so using the erb again and again will always produce the same result. If you want new data, you probably need to request it with AJAX.

In Rails, how do you render JSON using a view?

Docs to make ajax calls with jQuery: http://api.jquery.com/jQuery.ajax/

Ex:

setInterval(function() { 
  $.get('route/to/mash.json', function(data) {
     onDataReceived(data);
  });
}, 5000);

edited May 23, 2017 at 12:27

CommunityBot

11 silver badge

answered Feb 2, 2013 at 9:05

AJcodez

34.5k21 gold badges88 silver badges119 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

ruby hash calling through javascript

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related