如何传递 Morris Donut 值中的字符串

How to pass the string in Morris Donut value

如何在数据数组值下传递莫里斯甜甜圈中的字符串。我有一个像这样的莫里斯甜甜圈 Donut 1 And this is my code. I want like this Donut. Donut 2

Morris.Donut({
  element: 'donut-example',
  data: [
    <?php foreach ($pay as $r_pay): ?>
      {label: 'Level Name: <?= $r_pay['level_id']; ?>',value: '<?=$r_pay['total']; ?>'},
    <?php endforeach; ?>
  ]
});

Morris Documentation中表示除了elementdata还可以加上formatter其中

will translate a y-value into a label for the centre of the donut.

这是一个例子:

Morris.Donut({
  element: 'donut-example',
    data: [
      {label: "Download Sales", value: 12},
      {label: "In-Store Sales", value: 30},
      {label: "Mail-Order Sales", value: 20}
    ],
  formatter: function (y, data) { return 'Due Amount: ' + y }
});

产生这个: