""" This is based on the case scenario where you have a model which has a
DetailView
, but a "bespoke" PDF for the same model is also created that is
not dependent on the DetailView
(except to provide the query object).
Such as a "brochure" style version of the web content.
The PDF needs to be returned as a HTTPResponse
object. The model object is
provided.
Working project example: https://github.com/elena/django-pdfmixin-example
Credit: For the case scenario to convert HTML pages to PDFs see this snippet (from which this snippet largely drew upon): http://djangosnippets.org/snippets/2540/ """
from django.db import models
class Page(models.Model):
title = models.CharField(max_length=30)
slug = models.SlugField()
# ...
# -*- coding: utf-8 -*-
from django.http import HttpResponse
from reportlab.pdfgen import canvas
def render_to_pdf(my_page):
""" https://docs.djangoproject.com/en/dev/howto/outputting-pdf/ """
response = HttpResponse(content_type='application/pdf')
# uncomment to toggle: downloading | display (moz browser)
# response['Content-Disposition'] = 'attachment; filename="myfilename.pdf"'
c = canvas.Canvas(response)
c.drawString(100, 600, my_page.title)
c.showPage
c.save()
return response
# -*- coding: utf-8 -*-
from django.conf.urls import url, patterns
from .views import DetailView
urlpatterns = patterns('',
url(r'^page/(?P<slug>[\w/-]+)$', DetailView.as_view(),
name='page_detail'),
)
# -*- coding: utf-8 -*-
from django.views.generic import DetailView
from django.views.generic.base import TemplateResponseMixin
from .models import Page
from .pdfs import render_to_pdf
class PDFResponseMixin(TemplateResponseMixin):
"""
Mixin for Django class based views.
Switch normal and pdf template based on request.
The switch is made when the request has a particular querydict, per
class attributes, `pdf_querydict_keys` and `pdf_querydict_value`
example:
http://www.example.com?[pdf_querydict_key]=[pdf_querydict_value]
Example with values::
http://www.example.com?format=pdf
Simplified version of snippet here:
http://djangosnippets.org/snippets/2540/
"""
pdf_querydict_key = 'format'
pdf_querydict_value = 'pdf'
def is_pdf(self):
value = self.request.REQUEST.get(self.pdf_querydict_key, '')
return value.lower() == self.pdf_querydict_value.lower()
def get_pdf_response(self, context, **response_kwargs):
return render_to_pdf(self.get_object())
def render_to_response(self, context, **response_kwargs):
if self.is_pdf():
from django.conf import settings
context['STATIC_ROOT'] = settings.STATIC_ROOT
return self.get_pdf_response(context, **response_kwargs)
#context[self.pdf_url_varname] = self.get_pdf_url()
return super(PDFResponseMixin, self).render_to_response(
context, **response_kwargs)
class DetailView(PDFResponseMixin, DetailView):
model = Page
slug_field = 'slug'