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I have the following controller which picks data from my DBase :
function chart_js() {
$rows = '';
$query = "SELECT clnt_id,date_added FROM job_card ORDER BY date_added DESC LIMIT 0, 5";
$result = $this->db->query($query);
$total_rows = $result->num_rows;
if ($result) {
$rows = $result->result_array();
}
print json_encode($rows, JSON_NUMERIC_CHECK);
}
And passes it to json_encode in the following format :
[{"clnt_id": 10, "date_added": "2015-11-02 12:28:01"}, {"clnt_id": 11, "date_added": "2015-11-01 07:06:56"} , {"clnt_id": 9, "date_added": "2015-10-30 22:14:48"}, {"clnt_id": 7, "date_added": "2015-10-30 06:15:55"}, {"clnt_id": 10, "date_added": "2015-10-30 06:03:50"}]
The data above is the exact format of how the data is returned. I have used the above data to plot a static line graph and it worked very well. Below is my view :
<body class="nav-md">
<div class="panel panel-default">
<div class="panel-heading">
<i class="fa fa-bar-chart-o fa-fw"></i> Account Registrations Past 7 days
</div>
<!-- /.panel-heading -->
<div class="panel-body">
<div id="acctregs" style="height: 300px;"></div>
</div>
<!-- /.panel-body -->
</div>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/morris.js/0.5.1/morris.css">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael-min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/morris.js/0.5.1/morris.min.js"></script>
<script>
$(document).ready(function () {
var acct_regs = [{"clnt_id": 10, "date_added": "2015-11-02 12:28:01"}, {"clnt_id": 11, "date_added": "2015-11-01 07:06:56"}
, {"clnt_id": 9, "date_added": "2015-10-30 22:14:48"}, {"clnt_id": 7, "date_added": "2015-10-30 06:15:55"}, {"clnt_id"
: 10, "date_added": "2015-10-30 06:03:50"}];
var acctregs = new Morris.Line({
// ID of the element in which to draw the chart.
element: 'acctregs',
// Chart data records -- each entry in this array corresponds to a point on
// the chart.
data: acct_regs,
// The name of the data record attribute that contains x-values.
xkey: 'date_added',
// A list of names of data record attributes that contain y-values.
ykeys: ['clnt_id'],
// Labels for the ykeys -- will be displayed when you hover over the
// chart.
labels: ['Value'],
dateFormat: function (x) {
return new Date(x).toString().split("00:00:00")[0];
}
});
});
</script>
</body>
However when I try to retrieve this data from the controller which interacts with the Dbase by replacing the var acct_regs to :
var acct_regs = "<?php echo site_url('operations/char_js'); ?>";
I get the following error :
TypeError: a is undefined
...,h,i,j,k,l;return"number"==typeof a?a:(c=a.match(/^(\d+) Q(\d)$/),e=a.match(/^(\...
from morris.min.js. What is the best way to pass this data from controller to view so that it can display dynamic graphs?
You need to ajax the data use
$.getJSONTry: