Question

我有以下控制器从我的DBase中选择数据：

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);

}

并按以下格式将其传递给json_encode：

[{"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"}]

以上数据是数据返回方式的确切格式。我已经使用上面的数据绘制了一个静态线图，它运行得很好。以下是我的观点：

<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>

然而，当我尝试通过将var acct_regs替换为以下内容从与Dbase交互的控制器中检索此数据时：

var acct_regs = "<?php echo site_url('operations/char_js'); ?>";

我收到以下错误：

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

来自morris.min.js。将此数据从控制器传递到视图以便它可以显示动态图形的最佳方法是什么？

Answer 1

您需要使用$.getJSON

来使用数据

尝试：

$.getJSON("<?php echo site_url('operations/char_js'); ?>", function (json) { 
            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: json,
                        // 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];
                        }
                    });
        });

Morris Js和Codeigniter从控制器传递数据

1 个答案: