我是新的php和javascript，我正在做一个项目，我需要在我的网页中实现图形，但我得到这个错误morris. min. js：6 Uncaught TypeError: Cannot read properties of undefined (reading 'length')，我无法找到解决方案
html code
<!DOCTYPE html><html lang="en">
<head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><link rel="stylesheet" href="../Css/AdminDashboard.css"><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/morris.js/0.5.1/morris.css">2 <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>3 <script src="//cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael-min.js"></script>4 <script src="//cdnjs.cloudflare.com/ajax/libs/morris.js/0.5.1/morris.min.js">
</script>
</head>
<body><div class="bookingsGraph">
<div id="chart">
</div>
</div>
</body>
</html><script>
Morris.Line({
element: 'chart',
data: [<?php echo $chart_data; ?>],
xkey: 'date',
ykey: ['bookings'],
labels: ['Bookings'],
// hideHover: 'auto',
// stacked: true
});
</script>php代码
<?php
$connect = mysqli_connect("localhost", "root", "", "movietime");
$query = "SELECT COUNT(BookingId),BookingDate
FROM bookings
WHERE BookingDate='2019/12/13'";
$result = mysqli_query($connect, $query);
$chart_data = '';
while($row = mysqli_fetch_array($result))
{
$chart_data .= "{ date:'".$row["BookingDate"]."', bookings:".$row["COUNT(BookingId)"]."}, ";
}
$chart_data = substr($chart_data, 0, -2);
?>完全误差
morris.min.js:6 Uncaught TypeError: Cannot read properties of undefined (reading 'length')
at c.<anonymous> (morris.min.js:6:4567)
at c.<anonymous> (morris.min.js:6:4834)
at d.setData (morris.min.js:6:4865)
at c.d [as constructor] (morris.min.js:6:1739)
at new c (morris.min.js:6:13513)
at Object.c [as Line] (morris.min.js:6:13534)
at AdminDashboard.php:114:12我试过了
Morris.Line({
element: 'chart',
data: [{date:'2019/12/13',bookings:'6'}],
xkey: 'date',
ykey: ['bookings'],
labels: ['Bookings'],
// hideHover: 'auto',
// stacked: true
});
1条答案
按热度按时间w8f9ii691#
需要一个名为“length”的值
我不知道它为什么要这样做，但是给它一个名为length的值可能会让你通过这个问题。一旦代码运行，Length将变得不言自明。我希望这会有所帮助。