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Https://flic.kr/p/4MRZPn MVC Controllers.

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Presentation on theme: "Https://flic.kr/p/4MRZPn MVC Controllers."— Presentation transcript:

1 https://flic.kr/p/4MRZPn
MVC Controllers

2 Ye Olde Internet Today’s focus Browser DB Server View Router
Controller Model

3 5 Basic Controller Patterns
Create new/create: Enter a new record Read index: List all records show: Display a particular record Update edit/update: Modify an existing record Delete destroy: Remove a record

4 5 Basic Controller Patterns
Create new/create: Enter a new record Read index: List all records show: Display a particular record Update edit/update: Modify an existing record Delete destroy: Remove a record

5 How to implement index? Ye Olde Internet Browser DB Server View Router
Controller Model

6 How to implement index? Ye Olde Internet Demo Time!
Browser How to implement index? Route “index” URL pattern Controller uses Model to retrieve records Controller uses View to generate HTML (passes View records) Ye Olde Internet Demo Time! DB Server View 3 2 1 Router Controller Model

7 5 Basic Controller Patterns
Create new/create: Enter a new record Read index: List all records show: Display a particular record Update edit/update: Modify an existing record Delete destroy: Remove a record

8 How many HTTP requests does it take to create a record?
Browser How many HTTP requests does it take to create a record? Ye Olde Internet DB Server View Router Controller Model

9 How many HTTP requests does it take to create a record?
Browser How many HTTP requests does it take to create a record? Two: One to request a form (GET) One to perform the add (POST) Ye Olde Internet DB Server View Router Controller Model

10 How to implement get form?
Browser How to implement get form? Ye Olde Internet DB Server View Router Controller Model

11 How to implement get form?
Browser How to implement get form? Route URL pattern Controller uses View to generate HTML (passes View records) Ye Olde Internet DB Server View 2 1 Router Controller Model

12 How to implement post new record?
Browser How to implement post new record? Ye Olde Internet DB Server View Router Controller Model

13 How to implement post new resource?
Browser How to implement post new resource? Route URL pattern Controller uses Model to add rec Controller sends HTTP redirect Ye Olde Internet Demo Time! DB Server View 3 2 1 Router Controller Model

14 And the rest… show is like index edit/update is like new/create
destroy needs some explaining… Demo Time!

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