Rails + mongo db
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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.
![Models
class Person
include Mongoid::Document
end
person = Person.new
person[:name] = 'S辿rgio'
person[:age] = 26
person.save](https://image.slidesharecdn.com/railsmongodb-140518172028-phpapp01/85/Rails-mongo-db-12-320.jpg)
![Embeds
{
"_id" : ObjectId("4d3ed089fb60ab534684b7e9"),
"albums" : [
{
"_id" : ObjectId("4d3ed089fb60ab534684b7e0"),
"name" : "Boxer",
}
]
}](https://image.slidesharecdn.com/railsmongodb-140518172028-phpapp01/85/Rails-mongo-db-19-320.jpg)
Rails + mongo db
- 1. Rails + MongoDB = <3 S辿rgio Santos @sdsantos Improve Coimbra
- 3. Bundlr MongoDB stats MongoDB from the start ~ 3遜 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
- 11. Mongoid
- 12. Models class Person include Mongoid::Document end person = Person.new person[:name] = 'S辿rgio' 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 = 'S辿rgio' person.age = 26 person.save
- 14. Persistence person = Person.create(name: 'S辿rgio', age: 26) person.update_attributes(name: 'S辿rgio 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: 'S辿rgio').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
- 23. Wrapping up
- 24. Rails + MongoDB = <3 S辿rgio Santos @sdsantos me@sergiosantos.info Were hiring! nourishcare.co.uk/careers/