What is MVC?
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The document discusses Model-View-Controller (MVC), an architectural pattern that separates application logic from presentation, improving modularity and loose coupling between components. MVC divides applications into three components - the model, the view, and the controller, with the controller receiving input and calling methods on model objects that change their state, and the view being updated based on changes in the model. Several popular web frameworks that implement the MVC pattern are also listed.
![What is MVC? A Primer in 10 Slides Dominique Gerald M Cimafranca [email_address] http://villageidiotsavant.com By](https://image.slidesharecdn.com/whatismvc-110127215630-phpapp01/85/What-is-MVC-1-320.jpg)
![Without MVC Client database db=connect(database); var1=$_POST[“data1”]; var2=$_POST[“data2”]; db.query(“insert into db values var1,var2”); print “<HTML><H1>Success</H1></HTML>”; http://myapp/create.php http://myapp/read.php http://myapp/update.php http://myapp/delete.php database application presentation All in one program! delete.php update.php read.php create.php](https://image.slidesharecdn.com/whatismvc-110127215630-phpapp01/85/What-is-MVC-7-320.jpg)
What is MVC?
- 1. What is MVC? A Primer in 10 Slides Dominique Gerald M Cimafranca [email_address] http://villageidiotsavant.com By
- 2. Model-View-Controller an architectural pattern in software engineering
- 3. a way of designing and building applications
- 4. object-oriented software development
- 5. separates application logic from presentation
- 6. loose coupling between components
- 7. Without MVC Client database db=connect(database); var1=$_POST[“data1”]; var2=$_POST[“data2”]; db.query(“insert into db values var1,var2”); print “<HTML><H1>Success</H1></HTML>”; http://myapp/create.php http://myapp/read.php http://myapp/update.php http://myapp/delete.php database application presentation All in one program! delete.php update.php read.php create.php
- 8. What happens when you... change the database settings?
- 9. change the database design?
- 13. change the look and feel?
- 14. How does MVC work? Client http://myapp/customer/create http://myapp/customer/read http://myapp/customer/update http://myapp/customer/delete customer (controller) function create() { : : } function read() { : : } function update() { : : } function delete() { : : } function read($id) { Customer->get($id); $data=Customer->read(); : : render($data,”template.tpl”); } Controller handles application logic
- 15. A single controller may have multiple methods
- 16. A controller collects all the actions that takes place
- 17. Several controllers may comprise an application
- 18. How does MVC work? Client customer (controller) function create() { : : } function read() { : : } function update() { : : } function delete() { : : } function read($id) { Customer->get($id); $data=Customer->read(); : : render($data,”template.tpl”); } Controller invokes models
- 19. Controller manipulates model attributes
- 20. Controller uses model methods
- 21. Models can invoke other models Customer http://myapp/customer/create http://myapp/customer/read http://myapp/customer/update http://myapp/customer/delete name category quantity : read() save() :
- 22. How does MVC work? Client customer (controller) function create() { : : } function read() { : : } function update() { : : } function delete() { : : } function read($id) { Customer->get($id); $data=Customer->read(); : : render($data,”template.tpl”); } name category quantity : read() save() : Customer http://myapp/customer/create http://myapp/customer/read http://myapp/customer/update http://myapp/customer/delete Controller combines data with template
- 23. Template may perform additional processing
- 24. Return combination as HTML $header $sidebar for($item in $data) { echo $item; } Our Customers : : : : Charlie Brown Lucy Van Pelt Linus Van Pelt
- 25. Or we could do it with XML Client customer (controller) function create() { : : } function read() { : : } function update() { : : } function delete() { : : } function read($id) { Customer->get($id); $data=Customer->read(); : : render($data,”template.tpl”); } name category quantity : read() save() : Customer XML request XML response $xml->serialize($data) Whatever... Java C / C++ JavaScript Client does not need to be a web browser
- 26. Can be any client that speaks XML
- 27. Serialization: conversion of data into bits
- 28. With this, we can talk about web services XML, JSON, YAML, ...
- 29. Some MVC web frameworks Ruby on Rails (www.rubyonrails.org)
- 37. Mojolicious (www.mojolicio.us) Frameworks make things easier BUT you don't need to use them to practice MVC
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