Hi
I'm trying to create a chart from a sql query which gets encoded into json.
I'm quite certain that my json format is correct:
[["Dato","Kilo"],["04-14",90],["04-15",90],["04-14",85],["04-15",85],["04-14",10],["04-15",10],["04-14",12],["04-15",12]]
SQL and PHP code:
<?php
global $wpdb;
$user_ID = get_current_user_id();
$sql="SELECT $wpdb->postmeta.meta_value as Kilo, $wpdb->posts.post_date
as Dato FROM $wpdb->posts, $wpdb->postmeta
WHERE post_type = 'workout'
AND post_author = $user_ID
AND meta_key = 'vægt'
AND post_status = 'publish'
";
$posts = $wpdb->get_results($sql);
$result = mysql_query($sql);
$num = mysql_num_rows($result);
# set heading
$data[0] = array('Dato','Kilo');
for ($i=1; $i<($num+1); $i++)
{
$data[$i] = array(substr(mysql_result($result, $i-1, "Dato"), 5, 5),
(int) mysql_result($result, $i-1, "Kilo"));
}
echo json_encode($data);
?>
Google chart code:
<script type="text/javascript" src="https://www.google.com/jsapi";></script>
<script type="text/javascript">
google.load('visualization', '1', { packages: ['corechart'] });
google.setOnLoadCallback(drawChart);
function drawChart() {
var jsonData = $.ajax({
url: "getData.php",
dataType: "json",
async: false
}).responseText;
var obj = window.JSON.stringify(jsonData);
var data = google.visualization.arrayToDataTable(obj);
var options = {
title: 'Test'
};
var chart = new google.visualization.LineChart(
document.getElementById('chart_div'));
chart.draw(data, options);
}
</script></head>
<div id="chart_div" style="width: 900px; height: 500px;"></div>
The chart is simply not showing up, and I can't figure out why. Any
suggestions?
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