Presentation for #donetskpy meetup on February 18th, 2012.

1. Django with Mongo using
Mongoengine
Artem Dudarev
#donetskpy, #cncdnua, February 2012

2. Other ways to use Mongo with Django
Which Python API should be used with Mongo DB and
Django?
• PyMongo
--
• Mongoengine
--
• Django MongoDB Engine
• MongoDB backend for Django-nonrel

3. Django

4. Django
The Web framework for perfectionists with deadlines.
Using Django
• Disqus
• Many newspapers: Washington Post, Guardian,
Lawrence.com.
In Donetsk
• Steelkiwi
• MLSDev

7. Mongo
Mongo (from "humongous") is a scalable,
high-performance, open source NoSQL database.
Using Mongo
• Foursquare
• Catch
In Donetsk
•?

8. Mongoengine
MongoEngine is a Document-Object Mapper (think ORM,
but for document databases) for working with MongoDB
from Python.

9. Mongoengine example
from mongoengine import (Document, EmbeddedDocument,
ListField, StringField, IntField)
class Metadata(EmbeddedDocument):
tags = ListField(StringField())
revisions = ListField(IntField())
class WikiPage(Document):
title = StringField(required=True)
text = StringField()
metadata = EmbeddedDocumentField(Metadata)

10. Mongoengine example (cont.)
>>> page.title = “Hello, World!”
>>> for page in WikiPage.objects:
>>> print page.title

11. — Игорь Афонов, #cncdnua #32

12. «Делайте велосипеды, но то так, что
бы хотелось на них ездить.»
— Игорь Давыденко, #kyivpy #5

13. Tumblr
• http://wearethe99percent.tumblr.com/
• http://dearphotograph.com/
• http://stockingisthenewplanking.com/
• http://dudarev.tumblr.com/

14. Tumblr (cont.)
http://mashable.com/2011/11/14/tumblr-infographic/
• 35M tumblogs
• 45% photos
• Top 5 tags: GIF, LOL, Fashion, Art, Vintage
• 218% growth (from June to June)
• $800M valuation

15. Mumblr
• Harry Marr - developer of Mongoengine
• Mumblr - Tumblr clone
Starting with Python (virtualenv, pip)
git clone https://github.com/hmarr/django-mumblr.git mumblr
cd mumblr
virtualenv .
source bin/activate
pip install -r requirements.txt
cd example

16. Mumblr (starting Mongo)
http://www.mongodb.org/display/DOCS/Quickstart+Unix
curl http://downloads.mongodb.org/linux...tgz > mongo.tgz
tar xzf mongo.tgz
sudo chown `id -u` /data/db
sudo chown `id -u` /data/db/*
./mongodb-linux-i686-2.0.2/bin/mongod
./mongodb-linux-i686-2.0.2/bin/mongo
use mumblr-example
db.dropDatabase()

17. Mumblr (adding user)
ls mumblr/management/commands/
python manage.py adduse
python manage.py runserver

18. Points
• Django is an excellent framework for not too
complicated sites
• MongoDB is #1 NoSQL database - try it
• Djangists may find Mongoengine convenient
• Do reinvent the wheel
• Make it easy for others to start using it

19. Credits
Logos
• Django
• Mongo
• Mongoengine
Comics
• How to Write a CV
• The Hard Life Of A NoSQL Coder
rst2pdf
• rst2pdf
• style by Alexis Métaireau was partially used