Sails.js Model / ORM introduce

http://sailsjs.org/

sails 0.10 beta

• sails-0.10.0-reference

• .done() vs. .exec()

• Model Associations

• sails console

• promises in core

sails upgrade 0.10 beta

• npm i sails@beta -g

• npm i sails@beta -save

• npm i sails-mysql@beta -save

• npm i sails-mongo@beta -save

• config/connections.js • addconfig/models.js

DB Setting

Why you need ORM ?

How Create Table? traditional way

SHOW CREATE TABLE `post`; !ALTER TABLE `post` ADD `title` VARCHAR(100) NULL DEFAULT NULL AFTER `id`; !ALTER TABLE `post` ADD `content` TEXT DEFAULT NULL AFTER `title`;

MySQL

MySQL

SELECT * FROM `post` WHERE `id` = '1' LIMIT 1;

MySQL

MySQL

Terrible happened

• DB schema modify

• Multi tables join

• Migrate Table or Database

• Change adapter

• more ...

Can we controller Model from Code???

ORMObjective Orient Model

Object Orented

adpters

one of best practices

Sql & Nosql

SQL vs. MongoDB

WaterlineSails.js ORM module

Model

• file path -> api/models

• Capital naming

• Set schema and rule.

• ORM like

• you can use multi-adapter

Model Associations

• sails 0.10 new Feature

• Many-to-Many

• One-to-Many

• One-to-One

Disk database (default)

Adapter support

• MySQL

• MongoDB

• Redis

• ...

• http://sailsjs.org/#!documentation/models

Adapter config

• config/connections.js • addconfig/models.js

DB Setting

Attribute type• string

• text

• integer

• float

• date

• time

• datetime

• boolean

• binary

• array

• json

Custom Defined Instance Methods

example, api/models/Post.js

example, api/models/Post.js

generate a table and column

Auto migration

example2, api/models/Post.js

insert a attribute in Post model

Before and After

Lifecycle Callbacks

sails model

define Model Associations

One to One

One to Many

Controller and Model

example, controller call Post model

example, controller call Post model

model name

example, controller call Post model

model behavior

example, controller call Post model

new data

example, controller call Post model

success callback

& response

Model documenthttp://sailsjs.org/#!documentation/models

• User.create({name:"smlsun"}).exec(console.log);

• Post.create({title:"post", content:"body", user:1}).exec(console.log);

• Post.create({title:"post another", content:"body", user:1}).exec(console.log);

• Post.find().exec(console.log);

• Post.find().populate("user").exec(console.log);

• User.find().populate("posts").exec(console.log);

• Profile.create({email: "smlsun@gmail.com", user:1}).exec(console.log)

• Profile.find().populate("user").exec(console.log);