mongoid

Mongoid

Mongoid

Cyril Mougel

17 Janvier 2013

Mongoid

Mongoid c’est ?

1 Mongoid c’est ?

2 Mais MongoDB ?

3 Mongoid c’est aussi ?

Mongoid

Mongoid c’est ?

Qu’est ce que Mongoid ?

Un ODM Object Document Model

Ecrit en Ruby

API comme ActiveRecord

Mongoid

Mongoid c’est ?

Exemple simple

class User

include Mongoid :: Document

end

Mongoid

Mongoid c’est ?

Resultat

> user = User.new

=> #<User _id: 50 f07c2444fd9947a7000001 , _type:

nil >

Mongoid

Mongoid c’est ?

Definition des champs

Mongoid

Mongoid c’est ?

class User


field :first_name

field :last_name

end

Mongoid

Mongoid c’est ?

> user = User.new(: first_name => 123, :last_name

=> "Mougel")

=> #<User _id: 50 f07c4c44fd9947a7000003 , _type:

nil , first_name: 123, last_name: "Mougel">

> user.first_name

=> 123

> user.last_name

=> "Mougel"

Mongoid

Mongoid c’est ?

Gestion de la Coercion

Mongoid

Mongoid c’est ?

class User


field :first_name , :type => String

field :last_name , :type => String

end

Mongoid

Mongoid c’est ?

> user = User.new(: first_name => 123, :last_name

=> true)

=> #<User _id: 50 f07c4c44fd9947a7000003 , _type:

nil , first_name: "123", last_name: "true">

> user.first_name

=> "123"

> user.last_name

=> "true"

Mongoid

Mongoid c’est ?

Gestion d’un valeur par defaut

Mongoid

Mongoid c’est ?

class User


field :first_name , :type => String

field :last_name , :type => String

field :location , :type => String ,

:default => "Nantes"

end

Mongoid

Mongoid c’est ?

> user = User.new

=> #<User _id: 50 f07cbc44fd9947a7000004 , _type:

nil , first_name: nil , last_name: nil ,

location: "Nantes">

> user.first_name

=> nil

> user.location

=> "Nantes"

Mongoid

Mongoid c’est ?

Multiple Type de base

Mongoid

Mongoid c’est ?

BigDecimal

Boolean

Integer

String

Symbol

Float

Date

DateTime

Time

Array

Hash

Mongoid

Mais MongoDB?

1 Mongoid c’est ?

2 Mais MongoDB ?


Mongoid

Mais MongoDB?

Base NoSQLNoSQL == Not Only SQL

Mongoid

Mais MongoDB?

Base de donnee orientedocument

stockage sous format BSON

BSON == Binary JSON

Mongoid

Mais MongoDB?

Base de donnee orientedocument

Creation automatique du schema

Pas d’obligation d’homogeneite des documents

Mongoid

Mais MongoDB?

Pas de jointure

Mongoid

Mais MongoDB?

Query Operator

$in

$nin

$or

$gt

$lt

etc..

Mongoid

Mongoid c’est aussi ?

1 Mongoid c’est ?

2 Mais MongoDB ?


Mongoid


Include ActiveModel

Gestion des erreurs

Gestion des callbacks

Mongoid


Gestion des associations

Mongoid


Association entre collection

has many :orders

belongs to :user

Mongoid


class User


has_many :posts

end

class Post


belongs_to :user

end

Mongoid


> user = User.new

> user.posts = [ Post.new ]

> user.save

> user


nil >

> user.posts

=> [#<Post _id: 50 f07c2444fd9947a7000002 , _type:

nil >]

Mongoid


Association des documentsembarques

embeds many :comments

embedded in :post

Mongoid


class Post


embeds_many :comments

end

class Comment


embedded_in :post

end

Mongoid


> user = User.new

> user.comments = [ Comment.new ]

> user.save

> user


nil >

{

’_id’: 50 f07c2444fd9947a7000001 ,

’comments ’: [{

’_id’: 50 f07c2444fd9947a7000002

}]

}

Mongoid


Criteria

Model.where

Model.all in

Model.any in

Model.any of

Model.asc

Model.desc

Model.limit

Model.only

Mongoid


Les criterias sont chainable

Mongoid


Les criterias sont evalues demaniere lazy

Mongoid


Finder

Model.all

Model.first

Model.last

Model.exists ?

Model.find

Mongoid


MopedMongoDB driver developpe par la communaute Mongoid

Gestion plus threadsafe par session

Mongoid


Plus d’information ?RTFM

http ://mongoid.org

mongoid

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