CakePHP: Accessing the controller or model from a view helper

I have a view helper that manages generating thumbnails for images. The images are stored using a unique ID and then linked to a file resource in the database.

I am trying to find out if it is possible for the view helper that generates these images to access the model or controller directly, as it is not possible to load the image data at any other point in the controller work flow.

I know this is a bit of a hack really, but it is easier than trying to reb开发者_Go百科uild the entire data management stack above the view.

If you had set the data in the model or controller you could access it. So you'd have to think ahead in the controller. As you said you can't load it in the controller, perhaps you need to write a specific controller function, which you can call from the view using $this->requestAction() and pass in the image name or similar as a parameter.

The only disadvantage of this is using requestAction() is frowned upon, as it initiates an entirely new dispatch cycle, which can slow down your app a bit.

The other option, which may work is creating a dynamic element and passing in a parameter into the element and have it create the image for you. Although I'm not too sure how this would work in practise.

How are you generating the thumbnails using the helper in the view if you aren't passing data into it from a controller or model? I mean if it was me, I would be setting the 'database resource' in the controller, and passing it to the view that way, then having the helper deal with it in the view. That way you could bypass this issue entirely :)

$this->params['controller'] will return what you want.

According to the ... you can put this code in a view.ctp file then open the URL to render the debug info:

$cn = get_class($this);
$cm = get_class_methods($cn);
print_r($cm);
die();

You could write a helper and build in a static function setController() and pass the reference in through as a parameter and then store it in a static variable in your helper class:

class FancyHelper extends FormHelper {

static $controller;

    public static function setController($controller) {
    self::$controller = $controller;
    }

... more stuff
}

Then in your Controller class you could import the FancyHelper class and make the static assignment in the beforeFilter function:

App::uses('FancyHelper', 'View/Helper');

class FancyController extends AppController {
public $helpers = array('Fancy');


    function beforeFilter() {
    FancyHelper::setController($this);
    }

... more stuff

}

And then you could access the controller from other public functions inside FancyHelper using self::$controller.

You can check the code(line ☛366 and line ☛379) of the FormHelper, try with:

echo $this->request->params['controller'];
echo Inflector::underscore($this->viewPath);