Does the traditional use of the controller in MVC lead to a violation of the Single Responsibility P

Posted by Byron Sommardahl on Stack Overflow See other posts from Stack Overflow or by Byron Sommardahl
Published on 2010-04-22T23:22:49Z Indexed on 2010/04/22 23:33 UTC
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single-responsibility

Wikipedia describes the Single Responsibility Principle this way:

The Single Responsibility Principle states that every object should have a single responsibility, and that responsibility should be entirely encapsulated by the class. All its services should be narrowly aligned with that responsibility.

The traditional use of the controller in MVC seems to lead a programmer towards a violation of this principle. Take a simple guest book controller and view. The controller might have two methods/actions: 1) Index() and 2) Submit(). The Index() displays the form. The Submit() processes it. Do these two methods represent two distinct responsibilities? If so, how does Single Responsibility come in to play?

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