How to get the Model instance from route model binding in Laravel

This code snippet can be useful in authorizing form requests. For example, you get the post instance from the request and then check the user rights.

// Get the post instance from the request
$request->route('post');

// usage

/**
 * Determine if the user is authorized 
 * to make this request
 * 
 * @return bool
 */

public function authorize()
{
  return $this->user()->can('update', $this->route('post'));
}