une simp

1. Mongoid
Mongoid
Cyril Mougel
17 Janvier 2013

2. Mongoid
Mongoid c’est ?
1 Mongoid c’est ?
2 Mais MongoDB ?
3 Mongoid c’est aussi ?

3. Mongoid
Mongoid c’est ?
Qu’est ce que Mongoid ?
Un ODM Object Document Model
´
Ecrit en Ruby
API comme ActiveRecord

4. Mongoid
Mongoid c’est ?
Exemple simple
class User
include Mongoid :: Document
end

5. Mongoid
Mongoid c’est ?
R´sultat
e
> user = User . new
= > # < User _id : 50 f07c2444fd9947a7000001 , _type :
nil >

6. Mongoid
Mongoid c’est ?
D´finition des champs
e

7. Mongoid
Mongoid c’est ?
class User
include Mongoid :: Document
field : first_name
field : last_name
end

8. 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 "

9. Mongoid
Mongoid c’est ?
Gestion de la Coercion

10. Mongoid
Mongoid c’est ?
class User
include Mongoid :: Document
field : first_name , : type = > String
field : last_name , : type = > String
end

11. 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 "

12. Mongoid
Mongoid c’est ?
Gestion d’un valeur par d´faut
e

13. Mongoid
Mongoid c’est ?
class User
include Mongoid :: Document
field : first_name , : type = > String
field : last_name , : type = > String
field : location , : type = > String ,
: default = > " Nantes "
end

14. 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 "

15. Mongoid
Mongoid c’est ?
Multiple Type de base

16. Mongoid
Mongoid c’est ?
BigDecimal Date
Boolean DateTime
Integer Time
String Array
Symbol Hash
Float

17. Mongoid
Mais MongoDB ?
1 Mongoid c’est ?
2 Mais MongoDB ?
3 Mongoid c’est aussi ?

18. Mongoid
Mais MongoDB ?
Base NoSQL
NoSQL == Not Only SQL

19. Mongoid
Mais MongoDB ?
Base de donn´e orient´
e e
document
stockage sous format BSON
BSON == Binary JSON

20. Mongoid
Mais MongoDB ?
Base de donn´e orient´
e e
document
Cr´ation automatique du sch´ma
e e
Pas d’obligation d’homog´n´it´ des documents
e e e

21. Mongoid
Mais MongoDB ?
Pas de jointure

22. Mongoid
Mais MongoDB ?
Query Op´rator
e
$in
$nin
$or
$gt
$lt
etc..

23. Mongoid
Mongoid c’est aussi ?
1 Mongoid c’est ?
2 Mais MongoDB ?
3 Mongoid c’est aussi ?

24. Mongoid
Mongoid c’est aussi ?
Include ActiveModel
Gestion des erreurs
Gestion des callbacks

25. Mongoid
Mongoid c’est aussi ?
Gestion des associations

26. Mongoid
Mongoid c’est aussi ?
Association entre collection
has many :orders
belongs to :user

27. Mongoid
Mongoid c’est aussi ?
class User
include Mongoid :: Document
has_many : posts
end
class Post
include Mongoid :: Document
belongs_to : user
end

28. Mongoid
Mongoid c’est aussi ?
> user = User . new
> user . posts = [ Post . new ]
> user . save
> user
= > # < User _id : 50 f07c2444fd9947a7000001 , _type :
nil >
> user . posts
= > [ # < Post _id : 50 f07c2444fd9947a7000002 , _type :
nil >]

29. Mongoid
Mongoid c’est aussi ?
Association des documents
embarqu´s
e
embeds many :comments
embedded in :post

30. Mongoid
Mongoid c’est aussi ?
class Post
include Mongoid :: Document
embeds_many : comments
end
class Comment
include Mongoid :: Document
embedded_in : post
end

31. Mongoid
Mongoid c’est aussi ?
> user = User . new
> user . comments = [ Comment . new ]
> user . save
> user
= > # < User _id : 50 f07c2444fd9947a7000001 , _type :
nil >
{
’ _id ’: 50 f07c2444fd9947a7000001 ,
’ comments ’: [{
’ _id ’: 50 f 0 7 c 2 4 4 4 f d 9 9 4 7 a 7 0 0 0 0 0 2
}]
}

32. Mongoid
Mongoid c’est aussi ?
Criteria
Model.where Model.asc
Model.all in Model.desc
Model.any in Model.limit
Model.any of Model.only

33. Mongoid
Mongoid c’est aussi ?
Les criterias sont chainable

34. Mongoid
Mongoid c’est aussi ?
Les criterias sont ´valu´s de
e e
mani`re lazy
e

35. Mongoid
Mongoid c’est aussi ?
Finder
Model.all
Model.first
Model.last
Model.exists ?
Model.find

36. Mongoid
Mongoid c’est aussi ?
Moped
MongoDB driver d´velopp´ par la communaut´ Mongoid
e e e
Gestion plus threadsafe par session

37. Mongoid
Mongoid c’est aussi ?
Plus d’information ?
RTFM
http ://mongoid.org