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

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Presentation transcript:

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

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

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 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

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

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 records to View) Ye Olde Internet Demo Time! DB Server View 3 1 Router Controller Model 2

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 ✔

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

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

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

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

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

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

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 ✔ ✔ Like index Like create Needs explaining… Demo Time!