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My views.py file is as follows:
from django.shortcuts import render, render_to_response
from chartit import DataPool, Chart
from chartit.chartdata import DataPool
from weather.models import MonthlyWeatherByCity
import simplejson
from chartit import DataPool, Chart
def weather_chart_view(request):
ds=DataPool(series=[{'options': {'source': MonthlyWeatherByCity.objects.all()},'terms': ['month','houston_temp','boston_temp']}])
cht = Chart(datasource = ds, 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'}}})
return render_to_response('chart.html',{'weatherchart': cht})
The urls.py file inside the app is as follows:
from django.conf.urls import include, url
from django.contrib import admin
from weather import views
urlpatterns = [
url(r'^$', views.weather_chart_view , name='weather_chart_view')
]
The models.py file is as follows:
from django.db import models
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)
The chart.html file is as follows:
<head>
<!-- code to include the highcharts and jQuery libraries goes here -->
<!-- load_charts filter takes a comma-separated list of id's where -->
<!-- the charts need to be rendered to -->
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" type="text/javascript"></script>
<script src="http://code.highcharts.com/highcharts.js" type="text/javascript"></script>
<script src="/highcharts.js" type="text/javascript"></script>
{% load chartit %}
{{ weatherchart|load_charts:"container" }}
</head>
<body>
<div id='container'> {{ weatherchart|load_charts:"container" }}</div>
</body>
On running the server and opening the app I am getting the error:
TemplateSyntaxError at /weather/
'chartit' is not a valid tag library: ImportError raised loading chartit.templatetags.chartit: cannot import name simplejson
I have also included the app, chartit and json in the INSTALLED_APPS.
As you can see I have also imported simplejson in views. Where am I going wrong?
Please suggest if I need to post anything else to make the problem lucid.
912
There is a fix for the problem on the github page of the project. Do a pip install simplejson and then locate the file chartit/templatetags/chartit.py in the chartit module and replace the line of simplejson import as shown below.
from django import template
-from django.utils import simplejson
+import simplejson
from django.utils.safestring import mark_safe
It looks like a hack but works till the fix is merged.
154
You need to add chartit to INSTALLED_APPS in "settings.py"
INSTALLED_APPS = (
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'chartit',
)
Then, follow @akoshodi 's response.
24
In latest version of chartit (0.2.8) issue is fixed, so the only thing that you should do is to add 'chartit' in INSTALLED_APPS exactly as @MiaeKim mentions.
23
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