When do views render?

While trying to track down an error in a UsersController method:

    Notice (8): Undefined index: User [APP/Controller/UsersController.php, line ...]

I've come back to an issue that has yet to clarify in my head, specifically, the line in the cakephp v2 controller documentation that says:

    "... once a controller action has completed, CakePHP will handle rendering and delivering the View." 

Seems to me this line in the documentation is incorrect. In fact, a controller renders a view and then control may return to the same controller method to process any form date submitted by the view. Am I wrong in my thinking?

- James

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