ORM: All content tagged as ORM in NoSQL databases and polyglot persistence
Monday, 19 December 2011
Document Databases and Data Migrations
Sven Schmidt:
Since CouchDb is inherently unstructured, there’s no global schema that you manage to control your data’s structure. That’s often a good thing, because it gives you flexibility, but it can also cause problems, for example when you want to access documents without handling against all sorts of different “versions” of your document you might have.
When we first talked about document databases we said:
- no more ORM. Do a search or take a quick look at this list of NoSQL libraries and see if that still stands.
- no more schema constraints. The moment the structure of the data showed signs of evolving too rapidly, we started to look for ways to test document structure for inconsistency
- no more data migrations. Maybe no data migrations, but data versioning might be needed long term.
I think I’ve already written this once, but here it is again: the sum of constraints in a system is constant. The more relaxed the rules are on a component, the more constraints the rest of the components will need to support.
Original title and link: Document Databases and Data Migrations (©myNoSQL)
via: http://catbrainblog.wordpress.com/2011/12/19/couchdb-migrations/
Thursday, 5 August 2010
Django and NoSQL Databases Revisited
Django decided long time ago that Ruby on Rails cannot be the only framework where people can have fun integrating with all NoSQL databases. During this year DjangoCon Europe there were several session dedicated to Django and NoSQL databases:
- Alex Gaynor: What NoSQL support in the Django ORM looks like, and how do we get there
- Peter Bengtsson: Using MongoDB in your app
- Benoît Chesneau: Relax your project with CouchDB
- Tobias Ivarsson: Django and Neo4j: Domain Modeling that Kicks Ass
- Django and NoSQL Panel
What NoSQL support in the Django ORM looks like, and how do we get there
Alex Gaynor speaks about what needs to change in Django ORM to make it more NoSQL friendly:
Reinout van Rees has a summary of the talk ☞ here.
Using MongoDB in your app
Peter Bengtsson talks about his experience of passing from using ZODB for the last 10 years to MongoDB
Some notes from the talk are available ☞ here.
Relax your project with CouchDB
Benoît Chesneau talks about what makes CouchDB appealing to python developers. He also covers the CouchDBkit python framework.
Django and Neo4j: Domain Modeling that Kicks Ass
Not coming from DjangoCon, but still about Django and Neo4j, is Tobias Ivarsson’s presentation: “Django and Neo4j - Domain modeling that kicks ass”:
Derek Stainer summarizes the slide deck ☞ here.
Django and NoSQL Panel
A fantastic panel on the future of Django and NoSQL databases that you can watch over ☞ blip.tv. Reinout van Rees published a transcript of the panel ☞ here.
All in all a lot of NoSQL excitement in the Django world! Or should it be the opposite?
Update: Here is the latest Django and NoSQL Databases status update
Django and NoSQL Databases Revisited originally posted on the NoSQL blog: myNoSQL
