Mongoid is an ODM (Object-Document-Mapper) framework for MongoDB in Ruby.
Mongoid is developed against Ruby 1.8.6, 1.8.7, 1.9.1, 1.9.2
Note API changes will be frequent until the 1.0 release, and do not expect the gem to be of full production quality until that point.
Mongoid.connect_to("myapp_database_name")
Example of a simple domain model:
class Person < Mongoid::Document
field :title
field :age, :default => 0
has_many :addresses
has_one :name
end
class Address < Mongoid::Document
field :street
field :city
field :state
field :post_code
belongs_to :person
end
class Name < Mongoid::Document
field :first_name
field :last_name
has_timestamps
end
Mongoid supports all the basic ActiveRecord creation and persistence methods.
Creation:
Person.create(:title => "Esquire")
Person.create!(:title => "Sir", :name => { :first_name => "Elton", :last_name => "John" })
Save:
person.save person.save!Updating:
person.update_attributes(:title => "Sir")
person.update_attributes!(:name => { :first_name => "Emmanuel", :last_name => "Zorg" })
Deleting:
person.destroy Person.destroy_all(:title => "Sir") person.delete Person.delete_all(:title => "Sir")Retrieval of Documents from the database can be done in the traditional ActiveRecord manner or done using the Mongoid criteria DSL. Old School:
Person.find(:all, :conditions => { :title => "Esquire" })
Person.find(:first, :conditions => { :title => "Esquire" })
Person.first(:conditions => { :title => "Sir" })
Person.all(:conditions => { :title => "Sir" })
New School:
Person.select(:first_name, :last_name).where(:title => "Sir").skip(10).limit(10).execute
Criteria.translate(:conditions => { :title => "Sir" }).execute
Paginate Document search results:
Person.paginate(:conditions => {:title => "Esquire"}, :page => 1, :per_page => 20)
Validations:
Mongoid supports all validations provided by Jay Fields' Validatable gem.
For more information please see the Validatable documentation.
Validatable on RubyForge
Copyright (c) 2009 Durran Jordan
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