How to validate Route Parameters in Laravel 5?

Question

As you know Laravel 5 changes the way you call the validator, the old way is calling the validator facade, but now there is the ValidatesRequests

Answer 1

Manix's answer wasn't working for me, I was having the same issues as Iliyass. The issue is route parameters aren't automatically available to the FormRequest. I ended up overriding the all() function in my particular FormRequest Class:

public function all()
{
    // Include the next line if you need form data, too.
    $request = Input::all();
    $request['username'] = $this->route('username');
    return $request
}

Then you can code rules as normal:

public function rules()
{
    return [
        'username' => 'required',
    ];
}