Django、Echarts异步请求、动态更新

前端页面

<!DOCTYPE html>
<html><head><meta charset="utf-8"><title>echarts示例</title>		<script src="jquery.min.js"></script><script type = "text/javascript" src = "echarts.min.js" ></script>		</head><body>				<div id="main" style="width: 600px;height:400px;"></div><script type="text/javascript">var myChart = echarts.init(document.getElementById('main'));// 初始化图表选项myChart.setOption({title: {text: 'ECharts 数据异步加载示例'},tooltip: {},legend: {data: ['销量']},xAxis: {data: []},yAxis: {},series: [{name: '销量',type: 'bar',data: []}]});function fetchData() {$.ajax({url: 'api/echarts/demo/', // 改为你的数据接口地址dataType: 'json',success: function(data) {// 假设返回的数据格式如下:// {//     categories: ["衬衫", "羊毛衫", ...],//     values: [5, 20, ...]// }myChart.setOption({xAxis: {data: data.categories},series: [{name: '销量',data: data.values}]});},error: function(xhr, type, errorThrown) {// 处理错误}});}// 设置定时器，定期更新数据setInterval(function () {fetchData(); // 调用获取数据的函数}, 5000); // 5000毫秒即5秒钟更新一次数据</script></body>
</html>

跨域问题，依然采用nginx代理。

后端代码

from django.http import HttpResponse
import jsondef EchartsDemo(request):data = {}categories = ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]values = [50, 20, 36, 10, 10, 20]data['categories'] = categoriesdata['values'] = valuesprint("echerts=",data)return HttpResponse(json.dumps(data), content_type="application/json")

展示效果：