1. So you want to use
DJANGO AND
MONGODB
@flaper87

2. DJANGO AND
MONGODB
THAT’S COOL, but you need
to know A COUPLE OF THINGS

3. LIKE: WHAT ARE
THE OPTIONS?

4. ( http://mongoengine.org )
An object-document mapper
to connect Python and MongoDB

5. Mongokit
( http://namlook.github.com/mongokit/ )
Another ODM
that takes mongodb into the web

6. OR, OF COURSE

7. DJANGO
MONGODB
ENGINE
(A MongoDB backend for Django)

8. DJANGO-NONREL
A good and up to date Django fork
that brings non-rel support

9. Sadly, some of your
django.contrib.*
may be broken, but not the admin

10. erm...

11. erm... OKAY
WHAT’S SO COOL
ABOUT THIS THEN?

12. WHAT’S SO COOL
ABOUT THIS THEN?
No changes needed.

13. ABOUT THIS THEN?
No changes needed.
NOBODY’S GONNA TOUCH
YOUR PRECIOUS BUILTINS.

14. NOBODY’S GONNA TOUCH
YOUR PRECIOUS BUILTINS.
REDUCED IMPEDANCE MISSMATCH

15. That’s cool
WHAT ELSE?

16. NEW FIELDS

17. AGGREGATIONS

18. GRIDFS

19. CACHING

20. MAP / REDUCE
>>> for pair in Article.objects.map_reduce(_map, _reduce, 'wordcount'):
... print pair.key, pair.value

21. NEW INDEXES
class Club(models.Model):
location = ListField()
rating = models.FloatField()
...
class MongoMeta:
indexes = [
[('rating', -1)],
{'fields': [('location', '2d')], 'min': -42, 'max': 42},
]

22. Plus:
TONS OF DOCS
(which never hurts)

23. Suggestions

24. RAW QUERIES
MyModel.objects.raw_query(field=“value”)

25. EMBEDD IF
POSSIBLE
class Comment(models.Model):
created_on = models.DateTimeField()
author = EmbeddedModelField('Author')
text = models.TextField()

26. RE-THINK
YOUR MODELS
class Post(models.Model):
title = models.CharField()
text = models.TextField()
tags = ListField()
# Note: Use defer
comments = ListField(EmbeddedModelField('Comment'))

27. DO NOT USE IT
EVERYWHERE
MONGODB_MANAGED_APPS = ['myapp']
MONGODB_MANAGED_MODELS = ['myapp.MongoDBModel']

28. SERVE STATIC
FILES
GridFSStorage + nginx-GridFS

29. AGGREGATIONS?
MAP/REDUCE
class Min(MongoAggregate):
initial_value = float('inf')
reduce_template = '{alias} = ({lookup}<{alias})?{lookup}:{alias}'
class Max(MongoAggregate):
initial_value = float('-inf')
reduce_template = '{alias} = ({lookup}>{alias})?{lookup}:{alias}'

30. DATES WORK
But, MongoDB
does not support month/day queries

31. DO NOT TRY
TO MIGRATE
It Wont Work!

32. CONTRIBUTE
The Compiler’s a mess

33. Ask away
http://groups.google.com
/group/django-non-relational
Contribute:
http://django-mongodb.org
/meta/contributing.html