Re: [fw-mvc] Dispatch problem - between action method call and view rendering

-- Cristian Bichis <cristi@imagis.ro> wrote
(on Monday, 12 July 2010, 12:30 PM +0300):
> I need to accomplish this: once an Action method is called (for all actions,
> from any module and controller; not just for one case) so i can run my own
> code, but BEFORE the action view is actually rendered.
>
> Sample of problem: I am trying to dynamically set the doctype for any action,
> based on the layout selected by each action. So the action view is also
> rendered with the same doctype as the layout!

Register an action helper that defines a postDispatch() hook... but make
sure it happens _before_ the ViewRenderer is registered with the helper
broker.

As an example, using a resource method in your bootstrap:

class Bootstrap extends Zend_Application_Bootstrap_Bootstrap
{
protected function _initMyhelper()
{
Zend_Controller_Action_HelperBroker::addHelper(
new My_Helper_PostDispatchActions()
);
}
}

If you move this to a resource plugin, just make sure your configuration
defines it _prior_ to the view plugin:

resources.myhelper[] =
resources.view[] =

This will ensure that your helper gets registered first. Since the
HelperBroker acts on helpers as a stack, i.e. FIFO, this will ensure
that it executes before the ViewRenderer (which is registered during the
view resource, or even later, curing dispatch() of the front
controller).

Now, as to your action helper, it would look something like the
following:

class My_Helper_PostDispatchActions
extends Zend_Controller_Action_Helper_Abstract
{
public function postDispatch()
{
$layout = Zend_Layout::getMvcInstance();
$layoutScript = $layout->getLayout();

switch ($layoutScript) {
case '...':
// ...
break;
default:
break;
}
}
}

> If checking for the current layout occurs on a controller plugin postDispatch
> the view is already rendered so only the layout would have been rendered with
> correct doctype, and the action view is rendered with the default doctype
> rather than with the doctype of selected layout... So i need to actually set
> the doctype between action method call and action view rendering...
>
> That's just a sample of problem. I couldn't accomplish this by using controller
> plugin postDispatch and also with a postDispatch of a registered helper (using
> Zend_Controller_Action_HelperBroker::addHelper);
>
> Cristian

--
Matthew Weier O'Phinney
Project Lead | matthew@zend.com
Zend Framework | http://framework.zend.com/
PGP key: http://framework.zend.com/zf-matthew-pgp-key.asc