Authorize middleware doen't recognize my model if it's a valid Model instance

[shulard]

• Laravel Version: 5.2, 5.3, 5.4
• PHP Version: all

Description:

Inside one of my projects, I've found the if I gave a valid Model instance to the Authorize middleware, the Model is not recognized as one and the $request->route($model); code is called.
This call will fail because my $model variable is an object and the route method need a string as parameter name.

I think that it'll be better if the getGateArguments method in Authorize middleware verify if the given model is not already a Model instance...

I can make a PR but as it concerned 3 different branches what's the right way to do ? Create a PR for each version ?

Steps To Reproduce:

I created an extension of the Authorize middleware like this which failed recognizing the model :

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Auth\Middleware\Authorize;

class AuthorizeCommand extends Authorize
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next, $ability = null, ...$models)
    {
        if ((null !== $command = $request->route('command')) &&
            $command instanceof Model
        ) {
            return parent::handle($request, $next, 'access', $command);
        }

        return $next($request);
    }
}

[themsaid]

You can open a PR on 5.4 since it's not a breaking change. 5.3 and prior are closed for new features.