Ruby on Rails

Your using a $.ajax call but not handling the response in any way.  It also seems that the data for your charts is being driven by instance variables from the controller.  This means that the data is set for the chart once, when the page is rendered and then never again.

I think what you want to do here is have your front-end charts populated through an ajax call, wrapped in a method.  This same method is used when you need to refresh the data on the page.  Essentially the HTML is rendered to give you the page structure and populate this with data using the ajax call, as opposed to using iVars from the controller.  Take a look at the jQuery documentation to get an idea on how to handle the ajax response.  You will want to write handler code for error responses as well to improve your debugging experience.

Does this make sense/help you out?  If not I can toss a small example of what I'm talking about here.

On Monday, February 15, 2016 at 11:50:47 AM UTC-8, Ruby-Forum.com User wrote:

I have a chart page with 12 charts on it. Each chart is in a self
contained partial. Each chart is a different group of data however the
common filter is a date range which I pass into the partial.

I implemented a jQRangeSlider to select the date range and pass that to
the controller which in turn re-renders the page.

I can't seem to get the charts to refresh showing the new data. I can
see in the terminal window the queries being called and they have the
right date however the chart is not refreshing.

HELP !!!

John

Part of the Controller
-------------------
class ChartsController < ApplicationController
  def charts
    if params.has_key?(:startdate)
      @startdate = params[:startdate]
      @enddate = params[:enddate]
    end
    @displaystartdate = @startdate.to_date.strftime("%m/%d/%Y")
    @displayenddate = @enddate.to_date.strftime("%m/%d/%Y")
    respond_to do |format|
      format.html
      format.js
    end
  end
end

Primary Chart View
----------------------
<br />
<div id="slider"></div>
<br />
<script>
  function pad2(number) {
       return (number < 10 ? '0' : '') + number
  };

  function datachanged(displaystart,displayend) {
    $("#date_display h2").text('Dates from '+displaystart+' to
'+displayend);
  };

  $("#slider").dateRangeSlider({
    arrows: false,
    bounds:{
      min: <%= first_training_jq %>,
      max: <%= last_training_jq %>
    },
    defaultValues:{
      min: <%= date_to_jq_date(@startdate) %>,
      max: <%= date_to_jq_date(@enddate) %>
    },
    });

  $("#slider").bind("userValuesChanged", function(e, data){
    var startdate = data.values.min;
    var enddate = data.values.max;
    var displaystart =
pad2(startdate.getMonth()+1)+'/'+pad2(startdate.getDate())+'/'+startdate.getFullYear();
    var displayend =
pad2(enddate.getMonth()+1)+'/'+pad2(enddate.getDate())+'/'+enddate.getFullYear();;

    var
newstartdate=startdate.getFullYear()+'-'+pad2(startdate.getMonth()+1)+'-'+pad2(startdate.getDate());
    var
newenddate=enddate.getFullYear()+'-'+pad2(enddate.getMonth()+1)+'-'+pad2(enddate.getDate());

    $("#date_display h2").text('Dates from '+displaystart+' to
'+displayend);

    $.ajax({
          url: "/charts",
          type: 'POST',
          data: { startdate: newstartdate, enddate : newenddate},
          cache: false,
          dataType: 'json'
      });
  });

</script>

<div class="navigation">
  <table>
    <tr>
      <td><%= link_to 'Back to Main Menu', :controller => 'home',
:action => 'menu' %></td>
    </tr>
  </table>
  <br>
</div>

<div id="date_display" align="center"><h2>Dates from <%=
@displaystartdate %> to <%= @displayenddate %></h2></div>

<div id="chart_list" align="center"><table>
  <tr>
    <td>
      <%= render partial: 'chart8', :locals => {:startdate =>
@startdate, :enddate => @enddate} %>
    </td>
  </tr>
</div>

And finally _chart8 partial
-----------------------
<script type="text/javascript" charset="utf-8">
  $(function() {
    new Highcharts.Chart({
      chart: {
        defaultSeriesType: "column",
        type: "column",
        renderTo: "charts8"
      },
      title: {
        text: "Test/Test"
      },
      xAxis: {
        type: 'category',
        labels: {
            rotation: -45,
            style: {
                fontSize: '13px',
                fontFamily: 'Verdana, sans-serif'
            }
        }
      },

      yAxis: {
        title: {
          text: "Counts"
        }
      },
      tooltip: {
        pointFormat: '<tr><td
style="color:{series.color};padding:0">{series.name}: </td>' +
            '<td style="padding:0"><b>{point.y}</b></td></tr>',
      },
    legend: {
      enabled: false
      },
      series: [{
        name: "Counts",
        data: <%= raw test_count_by_initiative(startdate, enddate)
%>
      }],
    dataLabels: {
        enabled: true,
        rotation: -90,
        color: '#FFFFFF',
        align: 'right',
        format: '{point.y:.1f}', // one decimal
        y: 10, // 10 pixels down from the top
        style: {
            fontSize: '13px',
            fontFamily: 'Verdana, sans-serif'
        }
    }
    });
  });
</script>
<div id="charts8"></div>

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