Laravel 5.6从资源中获取中间件请求的id

my resource route:

Route::resource('imagerequests', 'ImageRequestController');

It looks like this in the browser:

/imagerequests/19/edit

In my controllers contructor I do this because I need the middleware only when the user goes to the edit page:

$this->middleware('edit')->only('edit');

My editMiddleware:

public function handle($request, Closure $next)
{
    dd($request->id);
}

This returns null

I've tried this too and also returns null

public function handle($request, Closure $next)
{
    dd($request->imagerequests);
}

How can I access the id when I go to

EDIT

result of dd($request);

Request {#42 ▼
  #json: null
  #convertedFiles: null
  #userResolver: Closure {#295 ▶}
  #routeResolver: Closure {#302 ▶}
  +attributes: ParameterBag {#44 ▼
    #parameters: []
  }
  +request: ParameterBag {#50 ▼
    #parameters: []
  }
  +query: ParameterBag {#50 ▶}
  +server: ServerBag {#46 ▶}
  +files: FileBag {#47 ▶}
  +cookies: ParameterBag {#45 ▶}
  +headers: HeaderBag {#48 ▶}
  #content: null
  #languages: null
  #charsets: null
  #encodings: null
  #acceptableContentTypes: null
  #pathInfo: "/imagerequests/19/edit"
  #requestUri: "/imagerequests/19/edit"
  #baseUrl: ""
  #basePath: null
  #method: "GET"
  #format: null
  #session: Store {#356 ▶}
  #locale: null
  #defaultLocale: "en"
  -isHostValid: true
  -isForwardedValid: true
  basePath: ""
  format: "html"
}

EDIT 2

result of dd($next);

Closure {#294 ▼
  class: "Illuminate\Routing\Pipeline"
  this: Pipeline {#310 …}
  parameters: {▶}
  use: {▶}
  file: "C:\Users\EXM235\Desktop\acl-poc\vendor\laravel\framework\src\Illuminate\Routing\Pipeline.php"
  line: "28 to 36"
}

I'm not 100% sure this works for Middleware in the same way it does for Controllers, but in a Controller you'd typehint the model coming from the URL like so:

public function handle($request, Imagerequest $imagerequest, Closure $next)
{
    $imagerequest->id
}

Of course, you'd also need to add at the beginning:

use App\Imagerequest;