Display tagged images

I am trying to display tagged images with this snippet :

	if($tag = param('tag')) {
	$taggedimages = $site->index()->images()->filterBy('tags', '=', urldecode($tag), ',');
	dump($taggedimages);
}

But a request with a valid tag leaves me with that prompt

Collection Object
(
[pagination:protected] => 
[data] => Array
    (
    )
)

So I’m not sure what I’m doing wrong?

your filter method is not correct:

	$taggedimages = $site->index()->images()->filterBy('tags', '==', urldecode($tag), ',');

Thank you. That’s right.

Actually I tried with the correct operator but then the dump() just left me with a blank screen, and I’ve been misguided. So for my understanding, could please explain why the dump did not work?