Download to read offline
![Models class Person include Mongoid::Document end person = Person.new person[:name] = 'Sérgio' person[:age] = 26 person.save](https://image.slidesharecdn.com/railsmongodb-140518172028-phpapp01/75/Rails-mongo-db-12-2048.jpg)
![Embeds { "_id" : ObjectId("4d3ed089fb60ab534684b7e9"), "albums" : [ { "_id" : ObjectId("4d3ed089fb60ab534684b7e0"), "name" : "Boxer", } ] }](https://image.slidesharecdn.com/railsmongodb-140518172028-phpapp01/75/Rails-mongo-db-19-2048.jpg)
Uploaded bySérgio Santos
Rails + mongo db
This document discusses using MongoDB with Rails applications. It provides an overview of MongoDB concepts like documents, collections, references, and embeds. It also covers using the Mongoid ORM with Rails to interact with MongoDB, including modeling, persistence, querying, references, and embeds. The document concludes by mentioning cloud hosting on MongoHQ and notes that Rails and MongoDB are a good combination.
Rails + mongo db
- 1. Rails + MongoDB= <3 Sérgio Santos @sdsantos Improve Coimbra
- 2.
- 3. Bundlr MongoDB stats MongoDBfrom the start ~ 3½ years of development ~ 6 GB of data ~ 6 million documents Cloud hosted on MongoHQ
- 4.
- 5.
- 6.
- 7.
- 8.
- 9.
- 10.
- 11.
- 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 parentband 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.
- 23.
- 24. Rails + MongoDB= <3 Sérgio Santos @sdsantos me@sergiosantos.info We’re hiring! nourishcare.co.uk/careers/