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เริ่มต้นโค้ด Ruby on Rails
คู่มือสําหรับผู้เริ่มต้นพัฒนาเว็บด้วยเรลส์




by: Sakchai Siripanyawuth
Twitter: @artellectual
ในคอร์สนี้


 การติดตั้งเรลส์บนเครื่อง

 พัฒนาแอพพลิเคชั่นบล็อกให้มีล็อกอิน

 การติดตั้งแอพพลิเคชั่นบน Heroku
ตัวอย่างแอพพลิเคชั่น

MVC คืออะไร?

โครงสร้างข้อมูลเบื้องต้นบนเรลส์

ซอฟแวร์ที่ใช้พัฒนาบนเครื่อง

เริ่มใช้เรลส์

สร้างระบบจัดการข้อมูล
M
V
C
M
V
C
M
V
C



                       1
    Router
              ผู้ใช้เรียกดูข้อมูล
             /resource/action
M
V
C
               Controller


เราท์เตอร์เรียกใช้
                     2
 คอนโทรลเลอร์
                                      1
                 Router
                             ผู้ใช้เรียกดูข้อมูล
                            /resource/action
ดึงข้อมูล
M        จากโมเดล
                                   Model

V                     3

C
               Controller


เราท์เตอร์เรียกใช้
                      2
 คอนโทรลเลอร์
                                      1
                 Router
                             ผู้ใช้เรียกดูข้อมูล
                            /resource/action
ดึงข้อมูล                                4
M        จากโมเดล
                                   Model
                                                ดึงข้อมูล
V                     3                       จากฐานข้อมูล
C
               Controller


เราท์เตอร์เรียกใช้
                      2
 คอนโทรลเลอร์
                                      1
                 Router
                             ผู้ใช้เรียกดูข้อมูล
                            /resource/action
ดึงข้อมูล                                4
M        จากโมเดล
                                   Model
                                                ดึงข้อมูล
V                     3                       จากฐานข้อมูล
C                                    5
               Controller                          View
                                ประมวลผล
เราท์เตอร์เรียกใช้             ออกเป็นภาพ
                      2
 คอนโทรลเลอร์
                                      1
                 Router
                             ผู้ใช้เรียกดูข้อมูล
                            /resource/action
ดึงข้อมูล                                4
M        จากโมเดล
                                   Model
                                                ดึงข้อมูล
V                     3                       จากฐานข้อมูล
C                                    5
               Controller                          View
                                ประมวลผล
เราท์เตอร์เรียกใช้             ออกเป็นภาพ          6
                      2
 คอนโทรลเลอร์
                                      1
                 Router
                             ผู้ใช้เรียกดูข้อมูล
                            /resource/action
โครงสร้างข้อมูลเบื้องต้นบนเรลส์
โครงสร้างข้อมูลเบื้องต้นบนเรลส์

  Post
   • title:string
   • body:text
   • created_at:datetime
   • updated_at:datetime
โครงสร้างข้อมูลเบื้องต้นบนเรลส์

  Post
   • title:string
   • body:text
   • created_at:datetime
   • updated_at:datetime



  User
   • first_name:string
   • last_name:string
   • email:string
   • password:string
โครงสร้างข้อมูลเบื้องต้นบนเรลส์
                           Comment
  Post                      • title:string
   • title:string           • body:text
   • body:text              • created_at:datetime
   • created_at:datetime    • updated_at:datetime
   • updated_at:datetime    • post_id:integer (foreign_key)
                            • user_id:integer (foreign_key)
                            • parent_id:integer

  User
   • first_name:string
   • last_name:string
   • email:string
   • password:string
โครงสร้างข้อมูลเบื้องต้นบนเรลส์
            Post มีหลาย Comments
                                                   Comment
  Post                                              • title:string
   • title:string                                   • body:text
                           has_many
   • body:text                                      • created_at:datetime
   • created_at:datetime                            • updated_at:datetime
                                      belongs_to
   • updated_at:datetime                            • post_id:integer (foreign_key)
                                                    • user_id:integer (foreign_key)
                                                    • parent_id:integer

  User
   • first_name:string
   • last_name:string
   • email:string
   • password:string
โครงสร้างข้อมูลเบื้องต้นบนเรลส์
            Post มีหลาย Comments
                                                     Comment
  Post                                                • title:string
   • title:string                                     • body:text
                           has_many
   • body:text                                        • created_at:datetime
   • created_at:datetime                              • updated_at:datetime
                                        belongs_to
   • updated_at:datetime                              • post_id:integer (foreign_key)
                                                      • user_id:integer (foreign_key)
                                        belongs_to    • parent_id:integer

  User
   • first_name:string
   • last_name:string        has_many
   • email:string
   • password:string


          User มีหลาย Comments
โครงสร้างข้อมูลเบื้องต้นบนเรลส์
            Post มีหลาย Comments                                                        Comment
                                                     Comment
  Post
   • title:string
                                                      • title:string
                                                      • body:text                       ขึ้นตรงกับ
                           has_many
   • body:text                                        • created_at:datetime
   • created_at:datetime
                                        belongs_to
                                                      • updated_at:datetime                 Post
   • updated_at:datetime                              • post_id:integer (foreign_key)
                                        belongs_to
                                                      • user_id:integer (foreign_key)        &
                                                      • parent_id:integer
                                                                                        Comment
                                                                                        ขึ้นตรงกับ
  User
   • first_name:string
   • last_name:string        has_many
   • email:string                                                                           User
   • password:string


          User มีหลาย Comments
โครงสร้างข้อมูลเบื้องต้นบนเรลส์
            Post มีหลาย Comments                                                        Comment
                                                     Comment
  Post
   • title:string
                                                      • title:string
                                                      • body:text                       ขึ้นตรงกับ
                           has_many
   • body:text                                        • created_at:datetime
   • created_at:datetime
                                        belongs_to
                                                      • updated_at:datetime                 Post
   • updated_at:datetime                              • post_id:integer (foreign_key)
                                        belongs_to
                                                      • user_id:integer (foreign_key)        &
                                                      • parent_id:integer
                                                                                        Comment
                                                                                        ขึ้นตรงกับ
  User
   • first_name:string
   • last_name:string        has_many
   • email:string                                                                           User
   • password:string


          User มีหลาย Comments

                                             คีย์นอกมักอยู่ที่ตัว ‘belongs_to’
ซอฟต์แวร์ที่ใช้พัฒนาบน OS X


 Homebrew : http://mxcl.github.com/homebrew/
 Rbenv : https://github.com/sstephenson/rbenv
 MySQL : http://dev.mysql.com/downloads/
ซอฟต์แวร์ที่ใช้พัฒนาบน Windows


 Rails Installer : http://railsinstaller.org/
 MySQL : http://dev.mysql.com/downloads/
เริ่มโค้ด!

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เริ่มต้นโค้ด Ruby on Rails - Episode 1 - การติดตั้ง

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