half0wl / django-chartflo

Charts for the lazy ones in Django

Django Chartflo

Charts for the lazy ones in Django using Amcharts. Just make your query, pack the data and its ready.

Install

Clone and add 'chartflo', to INSTALLED_APPS

Usage

Generic view

from chartflo.views import ChartsView
from django.contrib.auth.models import User


class MyView(ChartsView):
 graph_type = "pyramid"

 def get_data(self):
     users = User.objects.all()
     staff = users.filter(is_staff=True)
     superusers = users.filter(is_superuser=True)
     others = users.filter(is_superuser=False, is_staff=False)
     dataset = {"users": others.count(), "staff": staff.count(),
                "superuser": superusers.count()}
     return dataset

Custom view

from chartflo.utils import ChartDataPack
from myapp.models import MyModelToChart

def special_check(value):
  if somecheck(value) is True:
  	return True
  return False

class MyChartsView(TemplateView):
  template_name = 'mytemplate.html'

  def get_context_data(self, **kwargs):
      context = super(MyChartsView, self).get_context_data(**kwargs)
      # get the data
      query = MyModelToChart.objects.all()
      # process count
      P = ChartDataPack()
      dataset = {}
      dataset["all_objects"] = P.count(query)
      dataset["published_objects"] = P.count(query.filter(published=True))
      dataset["special_objects"] = P.count(query, {"fieldname", special_check})
      # package the data
      datapack = P.package("chart_id", "Data label", dataset)
      context['datapack'] = datapack
      # options
      datapack['legend'] = True
      datapack['export'] = True
      return context

You must give a query to ChartDataPack.count. It is also possible to pass field names associated to functions to make some custom checks: if this function returns False the instance will not be counted.

In the template

{% include "chartflo/charts/pie.html" %}
   <div id="{{ datapack.chart_id }}" style="width: 100%; height: 600px; background-color: #FFFFFF;">
</div>

Available charts: pie.html, bar.html, pyramid.html, timeline.html