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Rails + mongo db

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Transcript

  • 1. Rails + MongoDB = <3 Sérgio Santos @sdsantos Improve Coimbra
  • 2. Introduction / Disclamer
  • 3. Bundlr MongoDB stats MongoDB from the start ~ 3½ years of development ~ 6 GB of data ~ 6 million documents Cloud hosted on MongoHQ
  • 4. MongoDB 101
  • 5. Documents
  • 6. Collections
  • 7. References
  • 8. Embeds
  • 9. Rails MongoDB ORMs
  • 10. Mongoid vs MongoMapper
  • 11. Mongoid
  • 12. Models class Person include Mongoid::Document end person = Person.new person[:name] = 'Sérgio' person[:age] = 26 person.save
  • 13. Models class Person include Mongoid::Document field :name, type: String field :age, type: Integer end person = Person.new person.name = 'Sérgio' person.age = 26 person.save
  • 14. Persistence person = Person.create(name: 'Sérgio', age: 26) person.update_attributes(name: 'Sérgio Santos') person.touch person.delete person.destroy person.rename(:name, :first_name)
  • 15. Querying person = Person.find("4baa56f1230048567300485c") people = Person.where(age: 18) people = Person.where(name: 'Sérgio').not(age: 26) Person.count Person.all.avg(:age) -- INSERT MAP/REDUCE CLEVER EXAMPLE HERE --
  • 16. References class Band include Mongoid::Document has_many :members end class Member include Mongoid::Document field :name, type: String belongs_to :band end
  • 17. References # The parent band document. { "_id" : ObjectId("4d3ed089fb60ab534684b7e9") } # The child member document. { "_id" : ObjectId("4d3ed089fb60ab534684b7f1"), "name" : "Matt Berninger" "band_id" : ObjectId("4d3ed089fb60ab534684b7e9") }
  • 18. Embeds class Band include Mongoid::Document embeds_many :albums end class Album include Mongoid::Document field :name, type: String embedded_in :band end
  • 19. Embeds { "_id" : ObjectId("4d3ed089fb60ab534684b7e9"), "albums" : [ { "_id" : ObjectId("4d3ed089fb60ab534684b7e0"), "name" : "Boxer", } ] }
  • 20. Extras identity map & cache paranoia versioning timestamps geo full text search
  • 21. Cloud Hosting
  • 22. Wrapping up…
  • 23. Rails + MongoDB = <3 Sérgio Santos @sdsantos me@sergiosantos.info We’re hiring! nourishcare.co.uk/careers/