dj_chart

The goal of dj_chart is generate charts with the awesome Chart.js library.

Requirements

Django 1.9

Quickstart

Install dj_auth:

pip install dj_chart

Put dj_auth into your INSTALLED_APPS at settings module:

INSTALLED_APPS = (
   ...
   'dj_chart',
)

TEMPLATES = [
    {'BACKEND': 'django.template.backends.django.DjangoTemplates',
     'DIRS': (your dirs, ),
     'APP_DIRS': True,
     'OPTIONS': { },
     },
]

Features

ChartMixin

You can use this Mixin for example with a Templateview or also ListView:

from django.views.generic import TemplateView

from dj_chart.views import ChartMixin

from .models import Fruits

class YourView(ChartMixin, Templateview):

    chart_title_show = True
    chart_title = u"Your Chart Title"
    chart_types_available = [PIE, DOUGHNUT]
    show_grid = False

    def get_chart_data(self):
        # populate self.chart_data
        # Apples
        self.chart_data['labels'].append("Apple")
        self.chart_data['datasets'][0]['backgroundColor'].append("rgb(0,148,63)")
        self.chart_data['datasets'][0]['data'].append(Fruits.filter(fruit_type=1).count())
        # Pear
        self.chart_data['labels'].append(Pear")
        self.chart_data['datasets'][0]['backgroundColor'].append("rgb(222,6,19)")
        self.chart_data['datasets'][0]['data'].append(Fruits.filter(fruit_type=2).count())
        # Banana
        self.chart_data['labels'].append("Banana")
        self.chart_data['datasets'][0]['backgroundColor'].append("rgb(187,187,187)")
        self.chart_data['datasets'][0]['data'].append(Fruits.filter(fruit_type=3).count())

    def get_context_data(self, **kwargs):
        context = super(YourView, self).get_context_data(**kwargs)
        context = self.set_chart_context(context)
        return context

Example with Dates on the x-axis:

from django.db import models
from django.views.generic import TemplateView

from dj_chart.constants import MONTH
from dj_chart.views import ChartMixin

class Category(models.Model):
    description models.CharField(max_length=100, verbose_name='Decscription')

class Person(models.Model):
    first_name = models.CharField(max_length=100, verbose_name='Firstname')
    last_name = models.CharField(max_length=100, verbose_name='Lastname')
    birthday = models.DateField(verbose_name=_(u'Birthday'))
    category = models.ForeignKey(Category, verbose_name=_(u'Category'))

class ChartPie(ChartMixin, TemplateView):

    chart_title_show = True
    chart_title = u"My Chart"
    chart_types_available = [PIE, DOUGHNUT, BAR]
    show_grid = False
    x_axis = MONTH
    steps = 6

    def get_chart_data(self):
        if self.queryset:
            self.set_labels_and_filter_values_for_xaxes(steps=self.steps, type=self.x_axis)

            for label in self.chart_data['labels']:
                self.label_urls[label] = {}
            self.chart_data['datasets'] = []
            for record in self.queryset:
                qs = Person.objects.filter(category=record)
                for i in range(1, len(self.filter_values)):
                    data.append(qs.filter(birthday__gte=self.filter_values[i - 1], birthday__lt=self.filter_values[i]).count())
                    self.label_urls["%s" % self.chart_data['labels'][i]]["%s" % record.description] = {"url": "%s" % reverse('your-url')}

    def get_context_data(self, **kwargs):
        context = super(ChartPie, self).get_context_data(**kwargs)
        self.queryset = Category.objects.all()
        context = self.write_chart_to_context(context)
        return context

Todo

• Python 3

Running Tests

Does the code actually work?

source <YOURVIRTUALENV>/bin/activate
(myenv) $ pip install -r requirements_test.txt
(myenv) $ coverage run --source=dj_auth runtests.py && coverage html

Credits

Tools used in rendering this package:

• Cookiecutter
• cookiecutter-djangopackage