Question

我有以下控制器将数据从mysql数据库传递到json

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();
        }

        echo json_encode($rows);
    }

该数据应该用于使用morris.js在我的视图上绘制/绘制线图。以下是我的脚本和HTML代码：

<div class="panel panel-default">
            <div class="panel-heading">
                <i class="fa fa-bar-chart-o fa-fw"></i> Client Jobs 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>



            var acct_regs = "<?php echo base_url(); ?>/operations/chart_js";
            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>

应该从上面提到的函数chart_js获取数据并使用它来绘制图形。但我不断收到错误：

TypeError: a is undefined


...,h,i,j,k,l;return"number"==typeof a?a:(c=a.match(/^(\d+) Q(\d)$/),e=a.match(/^(\...

问题在于用于从数据库获取数据的url，因为当我使用静态数据时，它的工作原理是什么，传递这个url的方法是什么：

var acct_regs = "<?php echo base_url(); ?>/operations/chart_js";

Javascript Morris.js TypeError：a是未定义的Codeigniter

0 个答案: