1. with Mongoid MongoDB + RoR

2. Agenda NoSQL What is MongoDB? Comparison – MongoDB vs. RDBMS What is Mongoid? Live MongoDB + Rails examples Pros and cons Summary

3. My experience Been working with Mongoid for a few months MongoDB 1.6 Mongoid 2.0.0.beta.20 Not yet on production

4. NoSQL movement

5. So what exactly is MongoDB? Document oriented Database Supports indexes Rich querying Auto-sharding GridFS BSON format

6. MongoDB vs. SQL Document Document reference Document reference

7. MongoDB vs. SQL Document Document reference Embedded document Document reference Embedded document

8. MongoDB vs. SQL Document Document reference Embedded document Document reference Embedded document

9. What is ? Think of ActiveRecord for MongoDB Mapping Ruby objects to MongoDB documents and embedded documents Supports Rails3 Named scopes, rich criteria API Also some problems…

10. How to use ? class Building include Mongoid::Document include Mongoid::Timestamps embeds_many :floors field :name field :occupied, :type => Boolean, :default => false field :area, :type => Integer end

11. How to use ? class Level include Mongoid::Document embedded_in :building, :inverse_of => :levels embeds_many :rooms field :type validate :type, :presence => true, :uniqueness => {:scope => :city} end

12. Building.first(:conditions => {:name.in => [“Dom”,”Stodoła”]}) Building.levels.where(:type => “poddasze”) Building.find(:all, :conditions => {:area.gt => 100}) How to use ?

13. Callbacks: after_save, before_save, before_validation, after_create, etc. Inheritance: class House < Building end house = House.new; house._type # => “house” Building.all# [house] How to use ?

14. Pros and cons of

15. Roflcopter.pl Examples of

16. Summary in a few months (when our app goes production) Summary

17. But… Summary

18. …don’t wait and try it yourself! Summary

19. http://mongodb.org http://mongoid.org Summary

20. Kolejnespotkanie 28 kwietnia – 19:00 Prezentacje? talks@prug.pl http://prug.pl