Fat Free框架动态路由不起作用

I am trying to get variable from URL to pass to the Controller

The URL looks like this http://example.org/MyCategory or http://example.org/MyCategory-1

My DB contains table for all categories that includes category_slug column

The route is GET /@category_slug = MainController->CategorySlug

My main controller has method that supposed to handle this, which should invoke method getBySlug() from the Categories model

Main Controller

function CategorySlug($category_slug){
    $categories = new Categories($this->db);
    $cat = $categories->getBySlug($category_slug);

    $this->f3->set('categories',$cat);
    echo \Template::instance()->render('index.html');
}

Categories Model

public function getBySlug($category_slug)
{
    $this->load(array('category_slug=?', $category_slug));
    return $this->query;
}

As you see from the code above, I am passing variable $category_slug, but have an error

@AlexB, what error are you getting?

However, you need to pick up the variable from the URL before you pass it to your methods;

$category_slug = $this->f3->get('PARAMS.category_slug')