Question

请帮助我如何从我的数据库数据动态填充此chartjs饼图，以便用饼图显示它。我的意思是从我的数据库中获取查询并将我的数据库提供的数据转换为与chartjs格式的数据需求兼容。请帮帮我。

我正在使用ajax从我的db中获取值：

function getpieclinic() {
    $.ajax({
       url: siteurl+"patients_report/piedataclinic",
       type: "GET",
       dataType: "JSON",
        success:function(response) {
            alert(response);
        }
    });
}

以下代码的值为JSON OBJECT WITH THESE QUERY RESULT（响应值）：

[{"clinic_name":"Clinic 1","total_checked_up":"4"},{"clinic_name":"Clinic 2","total_checked_up":"0"},{"clinic_name":"Clinic 3","total_checked_up":"0"},{"clinic_name":"Clinic 4","total_checked_up":"0"}]

以下是来自饼图样本的数据：

var pieChartCanvas = $("#pieChart").get(0).getContext("2d");
    var pieChart = new Chart(pieChartCanvas);
    var PieData = [
      {
        value: 700,
        color: "#f56954",
        highlight: "#f56954",
        label: "Chrome"
      },
      {
        value: 500,
        color: "#00a65a",
        highlight: "#00a65a",
        label: "IE"
      },
      {
        value: 400,
        color: "#f39c12",
        highlight: "#f39c12",
        label: "FireFox"
      },
      {
        value: 600,
        color: "#00c0ef",
        highlight: "#00c0ef",
        label: "Safari"
      },
      {
        value: 300,
        color: "#3c8dbc",
        highlight: "#3c8dbc",
        label: "Opera"
      },
      {
        value: 100,
        color: "#d2d6de",
        highlight: "#d2d6de",
        label: "Navigator"
      }
    ];
    var pieOptions = {
      //Boolean - Whether we should show a stroke on each segment
      segmentShowStroke: true,
      //String - The colour of each segment stroke
      segmentStrokeColor: "#fff",
      //Number - The width of each segment stroke
      segmentStrokeWidth: 2,
      //Number - The percentage of the chart that we cut out of the middle
      percentageInnerCutout: 50, // This is 0 for Pie charts
      //Number - Amount of animation steps
      animationSteps: 100,
      //String - Animation easing effect
      animationEasing: "easeOutBounce",
      //Boolean - Whether we animate the rotation of the Doughnut
      animateRotate: true,
      //Boolean - Whether we animate scaling the Doughnut from the centre
      animateScale: false,
      //Boolean - whether to make the chart responsive to window resizing
      responsive: true,
      // Boolean - whether to maintain the starting aspect ratio or not when responsive, if set to false, will take up entire container
      maintainAspectRatio: true,
      //String - A legend template
      legendTemplate: "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<segments.length; i++){%><li><span style=\"background-color:<%=segments[i].fillColor%>\"></span><%if(segments[i].label){%><%=segments[i].label%><%}%></li><%}%></ul>"
    };
    //Create pie or douhnut chart
    // You can switch between pie and douhnut using the method below.
    pieChart.Doughnut(PieData, pieOptions);

Answer 1

我认为你坚持为图表形式JSON创建Piedata。这是解决方案：

您的JSON字符串：

ERROR! 'yum' is not a valid attribute for a Play

首先将其转换为数组：

$json = '[{"clinic_name":"Clinic 1","total_checked_up":"4"},{"clinic_name":"Clinic 2","total_checked_up":"0"},{"clinic_name":"Clinic 3","total_checked_up":"0"},{"clinic_name":"Clinic 4","total_checked_up":"0"}]';

声明Empty变量：

$array = json_decode($json);

循环抛出数组：

$string_array = '';

再次将数组转换为JSON以获得所需的PieData：

foreach($array as $single_array){

    $string_array[] = array(
    'value'=>$single_array->total_checked_up,
    'color'=>'#f56954',
    'highlight'=>'#f56954',
    'label'=>$single_array->clinic_name
    );  
}

这就是你的PieData数据的样子。

var PieData  = json_encode($string_array);

如何动态填充我的chartjs饼图

1 个答案: