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Asked: 2026-05-18T19:50:09+00:00

I am considering using class extension as a way to connect my model with

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I am considering using class extension as a way to connect my model with my controller. I tried looking on the internet but could not find any information on this topic. This led me to the question of when a class should be extended and for what reasons.

This is my plan:

  • model class
  • controller extends model
  • new controller();
  • new view(controller);

Reason:
I can make all methods and variables that the view should not touch or alter protected (i.e. protected var myVar:String). This enables me to ensure that the view still has access to the data it needs but is unable to make accidental changes.

This whole thought process derived from the fact that I don’t want my view to have any influence whatsoever, while still remaining independent (i.e. I can have multiple views of the same model without having to tell the controller that an additional view has been added).

To summarize:

  • When should a class be extended? When should it be avoided?
  • Is my plan a valid implementation of MVC?
  • Is there a better way to disconnect the view in a way that meets my demands?

Thank you for reading till the end.

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1 Answer

  1. Editorial Team

    Your view will not have access to the protected methods of the model/controller. Protected does not mean read only, it means that only classes that extend the base class can access the protected properties or methods.

    To have read only attributes in your model you should look at using private/protected properties and then creating a public getter function for each property (Property can then be read but not set).

    Also to have access to the model from the view consider creating the Model as a Singleton so it can be accessed from anywhere in your application.

    The controller dosen’t usually do much else than listen for and dispatch events/notifications, sometimes for small projects you can make your Model class (Singleton) extend EventDispatcher and have it pretty much do everything you want, but this is not pure MVC and can quickly lead to technical debt if the project scope grows.

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