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MongoDB DataMapper Adapter

branch: master
README.rdoc

DataMapper MongoDB Adapter

Status

The adapter is going through a major re-work as DataMapper will soon support EmbeddedValue (see: wiki.github.com/datamapper/dm-core/roadmap) and the adapter will significantly benefit from that fact as there won't be a need to hack around DM's private API like it used to be. Apart from embedded docs support there's plenty of work that needs to be done around MongoDB's modifier operators (www.mongodb.org/display/DOCS/Updating). With these things done we can start thinking about releasing 1.0.

Contributors are most welcome! In case of any questions you can find me on #datamapper IRC channel.

solnic

Useful links:

Dependencies

Ruby gems

  • dm-core ~> 1.3.0.beta

  • dm-aggregates ~> 1.3.0.beta

  • dm-migrations ~> 1.2.0.beta

  • mongo ~> 1.5.0

  • mongodb ~> 2.0.0 (This gem is only tested against this version)

Install

gem install dm-mongo-adapter

Synopsis

DataMapper.setup(:default,
  :adapter  => 'mongo',
  :database => 'my_mongo_db',
)

# Define resources
class Student
  include DataMapper::Mongo::Resource

  property :id, ObjectId
  property :name, String
  property :age, Integer
end

class Course
  include DataMapper::Mongo::Resource

  property :id, ObjectId
  property :name, String
end

# No need to (auto_)migrate!
biology = Course.create(:name => "Biology")
english = Course.create(:name => "English")

# Queries
Student.all(:age.gte => 20, :name => /oh/, :limit => 20, :order => [:age.asc])

# Array and Hash as a property
class Zoo
  include DataMapper::Mongo::Resource

  property :id, ObjectId
  property :opening_hours, Hash
  property :animals, Array
end

Zoo.create(
  :opening_hours => { :weekend => '9am-8pm', :weekdays => '11am-8pm' },
  :animals       => [ "Marty", "Alex", "Gloria" ])

Zoo.all(:animals => 'Alex')

DataMapper plugins

Currently the adapter is known to work with:

  1. dm-timestamps

  2. dm-validations

  3. dm-aggregates

  4. dm-pager

  5. dm-serializer

  6. dm-types

  7. dm-is-tree

and expect more of course :)

Authors and contributors

The adapter has been originally written by Shane Hanna (shanna). Project is currently maintained by Piotr Solnica (solnic).

Contributors:

  • Anthony Williams (antw)

  • Lance Carlson (lancecarlson)

  • Markus Schirp (mbj)

Note on Patches/Pull Requests

  • Fork the project.

  • Make your feature addition or bug fix.

  • Add tests for it. This is important so I don't break it in a future version unintentionally.

  • Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)

  • Send me a pull request. Bonus points for topic branches.

Copyright

Copyright © 2009 “Shane Hanna”, 2009-2010 “Piotr Solnica”. See LICENSE for details.

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