Django - 无法获得显示数据的高图

时间:2017-05-15 21:10:51

标签: django python-3.x highcharts

我正在尝试通过以下解决方案在Highchart的帮助下显示图表:

Passing Django Database Queryset to Highcharts via JSON

但是我无法显示数据:

enter image description here

还是新手,感谢你的帮助,伙计们!

views.py

class ChartData(object):
    def check_valve_data():
        data = {'member_no': []}

        people = Member.objects.all()

        for unit in people:
             data['member_no'].append(unit.member_no)

        return data


 def chartViewHigh(request, chartID='chart_ID', chart_type='column', chart_height=500):
     data = ChartData.check_valve_data()

     chart = {"renderTo": chartID, "type": chart_type, "height": chart_height, }
     title = {"text": 'Check Member Data'}
     xAxis = {"title": {"text": 'Member'}, "categories": data['member_no']}
     yAxis = {"title": {"text": 'Data'}}

     return render(request, 'chart/chartViewHigh.html', {'chartID': chartID, 'chart': chart,
                                                    'title': title, 'xAxis': xAxis, 'yAxis': yAxis})

chartViewHigh.html

{% extends 'base.html' %}

{% load staticfiles i18n %}

{% block head %}
  <link href="{% static 'css/chart.css' %}" rel="stylesheet">
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
      <script src="https://code.highcharts.com/highcharts.js"></script>
      <script src="https://code.highcharts.com/modules/exporting.js"></script>

 {% endblock head %}

 {% block main %}

<h1 align="center">Analysis</h1>

{% block content %}
   <div id={{ chartID|safe }} class="chart" style="height:100px; width:100%"></div>
{% endblock %}


{% block extrajs %}
<script>
   var chart_id = {{ chartID|safe }};
   var chart = {{ chart|safe }};
   var title = {{ title|safe }};
   var xAxis = {{ xAxis|safe }};
   var yAxis = {{ yAxis|safe }};
</script>


<script>
$(document).ready(function() {
   $(chart_id).highcharts({
       chart: chart,
       title: title,
       xAxis: xAxis,
       yAxis: yAxis,
   });
});
</script>
{% endblock %}

{% endblock main %}

urls.py

urlpatterns = patterns[
    url(r'^chartViewHigh/$', views.chartViewHigh, name='chartViewHigh'),
]

1 个答案:

答案 0 :(得分:1)

一些问题:

您需要在图表ID模板变量周围使用引号来使其成为HTML属性:

<div id="{{ chartID|safe }}" ...

您没有传入有效的JQuery选择器:要选择上面的div,您应该使用$("#chart_ID")(请参阅JQuery selectors),所以使用Django模板变量,例如:

$("#{{ chartID|safe }}")

此外,数据似乎需要series键才能渲染(我没有使用过高图,但请参阅此处 - 添加时会显示图表):

https://www.highcharts.com/docs/getting-started/your-first-chart

ChartData类也不属于您的views.py文件 - 只有HTTP请求/响应属于那里。如果您还没有了解“Django方式”来做事,我建议您通过Django官方教程。例如,您的ChartData方法会生成一个member_nos列表,但您可以使用一行代码执行此操作:)

Member.objects.values_list('member_no', flat=True)