Morris Js 和 Codeigniter 从控制器传递数据答案

【问题标题】：Morris Js and Codeigniter pass data from a controllerMorris Js 和 Codeigniter 从控制器传递数据
【发布时间】：2015-11-03 09:41:57
【问题描述】：

我有以下控制器从我的 DBase 中挑选数据：

函数 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);

}

并以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"}]

上面的数据是返回数据的确切格式。我用上面的数据绘制了一个静态折线图，效果很好。以下是我的看法：

<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>

但是，当我尝试通过将 var acct_regs 替换为：

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。将这些数据从控制器传递到视图以便它可以显示动态图的最佳方法是什么？

【问题讨论】：

尝试在chart_js() 中添加header('Content-Type: application/json');
How do JavaScript closures work?的可能重复

标签： javascript php jquery codeigniter morris.js

【解决方案1】：

你需要ajax数据使用$.getJSON

试试：

$.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];
                        }
                    });
        });

【讨论】：