NoSQL を Ruby で実践するための n 個の方法

NoSQL Ruby n

NoSQL Ruby 1 n=1

(@Sixeight)

• NoSQL • MongoDB • MongoMapper •

× SQL

Not only SQL

CREATE TABLE cats ( id int NOT NULL, name text, PRIMARY KEY (id) ); INSERT INTO cats VALUES (1, “tama”);

$ mongo > db.cats.insert({name: “tama”})

$ mongo > db.cats.insert({name: “tama”}) > db.cats.insert({ name: “goro”, dapple_color: “gray” }) > db.cats.ﬁnd() { "_id" : ObjectId("4c49118783d1600c126d2147"), "name" : "tama" } { "_id" : ObjectId("4c49119983d1600c126d2148"), "name" : "goro", "dapple_color" : "gray" }

• Google BigTable • amazon Dynamo • HBase • Apache Casandra • CounchDB • MongoDB • and more

MongoDB by 10gen

MongoDB C++ (wikipedia)

• (the simplicity and power of JSON-like data schemas) • • Index • • in-place • large objects ( ) • • sharding • MapReduce •

≒ ≒

{ "_id" : ###, "name" : "tama" }

{ "_id" : ###, "name" : "tama" } { "_id" : ###, "name" : "goro", "dapple_color" : "gray" }

over 200 projects

MongoMapper http://github.com/jnunemaker/mongomapper

ActiveRecord API +

gem install mongo_mapper

class Cats include MongoMapper::Document key :name, String end

irb:001:0> Cats.create :name => 'tama' irb:002:0> Cats.ﬁrst => #<Cats name: "tama", _id: BSON::ObjectID('###')> irb:003:0> Cats.create :name => 'goro', :dapple_color => ‘gray’ irb:004:0> Cats.count => 2 irb:005:0> Cats.ﬁrst(:name => ‘goro’) => #<Cats name: "goro", dapple_color:”gray”,_id: ###>

Array, Binary, Boolean, Date, Float, Hash Integer, Nil, ObjectId, Set, String, Time Custom Type, and TypeLess

Array, Binary, Boolean, Date, Float, Hash TypeLess Integer, Nil, ObjectId, Set, String, Time Custom Type, and TypeLess

class Storage include MongoMapper::Document key :value end

irb:001:0> Storage.create :values => 25 irb:002:0> Storage.create :value => 'String' irb:003:0> Cats.all => [#<Storage value: 25, _id: BSON::ObjectID('###')>, #<Storage value: “String”, _id: BSON::ObjectID('###')>]

Array, Binary, Boolean, Date, Float, Hash Integer, Nil, ObjectId, Set, String, Time Custom Type, and TypeLess

class Family include MongoMapper::Document key :name, String many :cats end class Cats include MongoMapper::Document key :name, String key :family_id, ObjectId belongs_to :family end

class Person include MongoMapper::Document key :name, String one :address end class Address include MongoMapper::EmbeddedDocument key :zipcode, String key :street, String end

• validates_presence_of :title • validates_presence_of • validates_length_of • validates_format_of • validated_numericality_of • validates_acceptance_of • validated_conﬁgmati

class Cats include MongoMapper::Document key :name, String validates_presence_of :name end

class Cats include MongoMapper::Document key :name, String, :required => true end

before / after

validate, create, save

class Cats include MongoMapper::Document key :name, String before_validation :add_nyan private def add_nyan self.name += ‘ nyan’ end end

irb:001:0> Cats.create :name => 'tama' irb:002:0> Cats.ﬁrst => #<Cats name: "tama nyan", _id: BSON::ObjectID('###')>

module Charisma def fly puts “I’m flying” end end MongoMapper::Document. append_inclusions(Charisma) Cats.first(:name => ‘tama’).fly

MongoDB

DB KVS RDBMS

MongoMapper

ActiveRecord MongoDB

URL • http://www.mongodb.org/ • http://www.mongodb.org/display/DOCSJP/Home • http://wiki.github.com/jnunemaker/mongomapper/ • http://gihyo.jp/dev/serial/01/ruby/0033

by http://www.wanpug.com/

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NoSQL を Ruby で実践するための n 個の方法

by Tomohiro Nishimura on Jul 25, 2010

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NoSQL を Ruby で実践するための n 個の方法 Presentation Transcript