python - 使用 Python 2.7 在 Django 1.6 中实现 chartit - TypeError : 'NoneType' has no attribute __getitem__

Question

我已经在 Django 中成功地实现了一些应用程序。目前我尝试根据教程实现图表:http://chartit.shutupandship.com/docs/#how-to-use .

但我只收到此错误消息:

Exception Value: 'NoneType' object has no attribute '__getitem__'
Exception Location: /home/administrator/virtualenvs/django27/lib/python2.7/site-packages/chartit/templatetags/chartit.py in load_charts, line 68

失败出现在这一行: hco['图表']['renderTo'] = render_to

错误是否表明 render_to 不是字典？

模型.py:

Class MonthlyWeatherByCity(models.Model):
    month = models.IntegerField()
    boston_temp = models.DecimalField(max_digits=5, decimal_places=1)
    houston_temp = models.DecimalField(max_digits=5, decimal_places=1)

views.py:

def weather_chart_view(request):
    #Step 1: Create a DataPool with the data we want to retrieve.
    weatherdata = \
        DataPool(
           series=
            [{'options': {
               'source': MonthlyWeatherByCity.objects.all()},
              'terms': [
               'month',
               'houston_temp',
               'boston_temp']}
             ])

    #Step 2: Create the Chart object
    cht = Chart(
            datasource = weatherdata,
            series_options =
              [{'options':{
                  'type': 'line',
                  'stacking': False},
                'terms':{
                  'month': [
                    'boston_temp',
                    'houston_temp']
                  }}],
            chart_options =
              {'title': {
                   'text': 'Weather Data of Boston and Houston'},
               'xAxis': {
                    'title': {
                       'text': 'Month number'}}})

我在模板中包含了脚本文件，{{ load block }} ..

<div id='container'> {{ weatherchart|load_charts:"container" }} </div>

<script type="text/javascript" src="/static/js/jquery-1.11.0.js"></script>
<script type="text/javascript" src="/static/js/highcharts.js"></script>

但我认为这不是问题所在。

我该如何解决？谢谢!

Answer 1

尝试将 {{ weatherchart|load_charts:"container"}} 行从 ID 为 container 的 div 移出并移入header，比如 example