我目前正在尝试在我的 django 应用程序中显示一个条形图，该图表应该代表我在数据库中拥有的所有医院的总死亡率。当我在浏览器中键入 url 或在控制台中打印时，我可以看到数据，并且我得到了我期望的输出。现在的问题是图表没有显示在页面布局上，我没有收到任何错误或警告。我这里有代码
window.addEventListener('DOMContentLoaded', () => {
// Get the data from the server
fetch('/measures_data')
.then(response => response.json())
.then(data => {
// Process the data to get the mortality rates by hospital
console.log(data)
const labels = [];
const mortalityRates = [];
data.forEach(measure => {
labels.push(measure.hospital__name);
mortalityRates.push(measure.total_mortality_rate);
});
// Create a bar chart
const ctx = document.getElementById('motalityRate').getContext('2d');
const chart = new Chart(ctx, {
type: 'bar',
data: {
labels: labels,
datasets: [{
label: 'Total Mortality Rate',
data: mortalityRates,
backgroundColor: 'rgba(54, 162, 235, 0.2)',
borderColor: 'rgba(54, 162, 235, 1)',
borderWidth: 1
}],
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
}
});
});
})views.py
@require_http_methods(['GET'])
def measures_data(request):
measures = Measures.objects.values('hospital__name').annotate(
total_mortality_rate=Sum('mortality_rate')
).order_by('hospital__name')
return JsonResponse(list(measures), safe=False){% load static %}
<!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" />
<link rel="stylesheet" href="{% static '/dashboard/css/index.css' %}" />
<title>Dashboard</title>
</head>
<body>
<div class="chart census">
<h3 class="title">Mortality rate</h3>
<canvas id="motalityRate"></canvas>
</div>
<script type="text/javascript" src="{% static '/dashboard/js/main.js' %}"></script>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.10.0.min.js"></script>
<script type="text/javascript" src="{% static 'js/Chart.min.js' %}"></script>
</body>我尝试使用 chartjs CDN 库，但仍然无法正常工作。如有任何帮助，我们将不胜感激