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POUsing JSON in amcharts - How to modify a JSON output (Ruby on Rails)
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  1. POUsing JSON in amcharts - How to modify a JSON output (Ruby on Rails)
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    copied!<p>I am trying to use <a href="http://www.amcharts.com/" rel="nofollow">amcharts</a> and I want to use JSON to format the data for my chart. However, it seems that the syntax that amcharts accepts is not valid JSON. </p> <p>Here is the javascript code for the data for a hardcoded amchart chart:</p> <pre><code> var chartData = [{ country: "Czech Republic", litres: 301.90 }]; </code></pre> <p>Here is the code if I want to create the same chart with embedded ruby:</p> <p>Controller</p> <pre><code> @chart_data = [{"country": "Czech Republic", "litres": 301.90}] </code></pre> <p>View</p> <pre><code> var chartData = &lt;%= @chart_data.to_json %&gt;; </code></pre> <p>The <a href="http://jsonlint.com/" rel="nofollow">valid JSON</a> output:</p> <pre><code> [{"country": "Czech Republic", "litres": 301.90}] </code></pre> <p>However, what amcharts accepts is:</p> <pre><code> [{country: "Czech Republic", litres: 301.90}] </code></pre> <p>Therefore my chart is not working because amcharts doesn't accept the valid JSON. So is there a way to create "invalid" JSON without the double quotes around country and litres? Or is there a better way to get the data in the form amcharts accepts? Any help would be greatly appreciated.</p> <p>Here is the full javascript:</p> <pre><code> &lt;script type="text/javascript"&gt; var chart; var legend; var chartData = [{ country: "Czech Republic", litres: 301.90 }, { country: "Ireland", litres: 201.10 }, { country: "Germany", litres: 165.80 }, { country: "Australia", litres: 139.90 }, { country: "Austria", litres: 128.30 }, { country: "UK", litres: 99.00 }, { country: "Belgium", litres: 60.00 }]; AmCharts.ready(function () { // PIE CHART chart = new AmCharts.AmPieChart(); chart.dataProvider = chartData; chart.titleField = "country"; chart.valueField = "litres"; chart.outlineColor = "#FFFFFF"; chart.outlineAlpha = 0.8; chart.outlineThickness = 2; // WRITE chart.write("chartdiv"); }); &lt;/script&gt; </code></pre>
 

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