![NEW INDEXES class Club(models.Model): location = ListField() rating = models.FloatField() ... class MongoMeta: indexes = [ [('rating', -1)], {'fields': [('location', '2d')], 'min': -42, 'max': 42}, ]](https://image.slidesharecdn.com/django-mongodbdjangoday-120428093843-phpapp02/75/Django-mongodb-djangoday_-20-2048.jpg)
![DO NOT USE IT EVERYWHERE MONGODB_MANAGED_APPS = ['myapp'] MONGODB_MANAGED_MODELS = ['myapp.MongoDBModel']](https://image.slidesharecdn.com/django-mongodbdjangoday-120428093843-phpapp02/75/Django-mongodb-djangoday_-26-2048.jpg)
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Django mongodb -djangoday_
This document discusses options for using Django with MongoDB, including object-document mappers like MongoEngine and Mongokit. It notes that some Django contrib apps may be broken but the admin will work. Benefits highlighted include reduced impedance mismatch, support for new fields like aggregations, gridfs, caching, map reduce, and indexes. Suggestions include using raw queries, embedding documents when possible, rethinking models, only using MongoDB for certain apps/models, serving static files via GridFS, and leveraging aggregations and map/reduce. It warns against migrating data and notes dates work but month/day queries do not.
Django mongodb -djangoday_
- 1. So you wantto 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 THEOPTIONS?
- 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
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- 7. DJANGO MONGODB ENGINE (A MongoDB backendfor Django)
- 8. DJANGO-NONREL A good andup to date Django fork that brings non-rel support
- 9. Sadly, some ofyour django.contrib.* may be broken, but not the admin
- 10. erm... OKAY WHAT’SSO COOL ABOUT THIS THEN?
- 11. WHAT’S SO COOL ABOUTTHIS THEN? No changes needed.
- 12. ABOUT THIS THEN? No changes needed. NOBODY’S GONNA TOUCH YOUR PRECIOUS BUILTINS.
- 13. NOBODY’S GONNA TOUCH YOUR PRECIOUS BUILTINS. REDUCED IMPEDANCE MISSMATCH
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- 19. MAP / REDUCE >>>for pair in Article.objects.map_reduce(_map, _reduce, 'wordcount'): ... print pair.key, pair.value
- 20. NEW INDEXES class Club(models.Model): location = ListField() rating = models.FloatField() ... class MongoMeta: indexes = [ [('rating', -1)], {'fields': [('location', '2d')], 'min': -42, 'max': 42}, ]
- 21. Plus: TONS OF DOCS (which never hurts)
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- 24. EMBEDD IF POSSIBLE class Comment(models.Model): created_on = models.DateTimeField() author = EmbeddedModelField('Author') text = models.TextField()
- 25. RE-THINK YOURMODELS class Post(models.Model): title = models.CharField() text = models.TextField() tags = ListField() # Note: Use defer comments = ListField(EmbeddedModelField('Comment'))
- 26. DO NOT USEIT EVERYWHERE MONGODB_MANAGED_APPS = ['myapp'] MONGODB_MANAGED_MODELS = ['myapp.MongoDBModel']
- 27. SERVE STATIC FILES GridFSStorage + nginx-GridFS
- 28. 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}'
- 29. DATES WORK But, MongoDB does not support month/day queries
- 30. DO NOT TRY TOMIGRATE It Wont Work!
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- 32. Ask away http://groups.google.com /group/django-non-relational Contribute: http://django-mongodb.org /meta/contributing.html