我如何在 Laravel 授权中将数字传递给中间件“can”

Question

based on documentation https://laravel.com/docs/5.5/authorization#via-middleware

use App\Post;

Route::put('/post/{post}', function (Post $post) {
    // The current user may update the post...
})->middleware('can:update,post');

the 'post' in 'can:update,post' is variable passed from '{post}'.

im trying to use middleware('can:update,1') . its not working. maybe its search for '$1' variable, how to pass number '1' to 'can' middleware?

update this is the gate:

    Gate::define('update', function ($user, $role){
        $id = $user->id;
        $roles = $user::find($id)->roles()->get();
        $roleid = $roles[0]->pivot->role_id;
        //above code just for get role id, and $role_id is 1
       return $roleid === $role;
    });

Answer 1

Probably you don't have Policy created for Post.

You can create by command:

php artisan make:policy PostPolicy --model=Post

and then implement method update in that policy.

Answer 2

I to had this same problem so I did some digging into the 'can' middleware (Which maps to Illuminate\\Auth\\Middleware\\Authorize )

Once in the class we see the following code

 /**
     * Get the model to authorize.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  string  $model
     * @return \Illuminate\Database\Eloquent\Model|string
     */
    protected function getModel($request, $model)
    {
        if ($this->isClassName($model)) {
            return trim($model);
        } else {
            return $request->route($model, null) ?:
                ((preg_match("/^['\"](.*)['\"]$/", trim($model), $matches)) ? $matches[1] : null);
        }
    }

What this means is...

• If our string passed in is a class name then return that class name
• If it is not a class name then...
  • 1 Try to get it from the route, then return the route param
  • 2 Try to get the model from the string via the regex "/^['\\"](.*)['\\"]$/"

So now lets say we have the middleware call of $this->middleware(sprintf("can:create,%s,%s", User::class, Role::SUPPORT));
This will not work because the Role::SUPPORT does not match the regex
To match it we simply need to place the Role::SUPPORT into quotes.
TAKE NOTE OF THE "'" around the second %s $this->middleware(sprintf("can:create,%s,'%s'", User::class, Role::SUPPORT));

To answer your question specifically, quote your '1' value

middleware("can:update,'1'").