我是Laravel 9的初学者。当我点击编辑表单时，我会收到错误，点击编辑表单后，我无法提交编辑，而是点击侧边栏中的 Jmeter 板菜单，在给出错误Trying to get property 'slug' of non-object后，我查看URL，URL更改为http://127.0.0.1:8000/laporan-edit/dashboard，应该有链接http://127.0.0.1:8000/dashboard。
我的控制器

<?php
namespace App\Http\Controllers;
use App\Models\Laporan;
use Illuminate\Http\Request;
class LaporanController extends Controller
{
    public function index()
    {
        $laporan = Laporan::all();
        return view('laporan', ['laporan' => $laporan]);
    }
    public function add()
    {
        return view('laporan-add');
    }
    public function store(Request $request)
    {
        $validated = $request->validate([
            'nama_korban' => 'required|max:255'
        ]);
        if ($request->file('foto')) {
            $extension = $request->file('foto')->getClientOriginalExtension();
            $NamaBaru = $request->nik_korban . '-' . now()->timestamp . '.' . $extension;
            $request->file('foto')->storeAs('fotokorban', $NamaBaru);
        }
        $request['foto_korban'] = $NamaBaru;
        Laporan::create($request->all());
        return redirect('laporan')->with('status', 'Data Telah Ditambahkan !');
    }
    public function edit($slug)
    {
        $laporan = Laporan::where('slug', $slug)->first();
        return view('laporan-edit', ['laporan' => $laporan]);
    }
    public function update(Request $request, $slug)
    {
        $laporan = Laporan::where('slug', $slug)->first();
        $laporan->update($request->all());
        return redirect('laporan')->with('status', 'Data Telah Di Edit');
    }
}

我的模型文件

<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
use Cviebrock\EloquentSluggable\Sluggable;
use Illuminate\Database\Eloquent\Factories\HasFactory;
class Laporan extends Model
{
    use HasFactory;
    use Sluggable;
    protected $fillable = [
        'petugas_pendamping', 'kronologi_kejadian', 'id_pengguna', 'nama_pelaku', 'jenis_kasus', 'foto_korban', 'tempat_kejadian', 'alamat_kejadian', 'wilayah_pendamping', 'korban', 'slug', 'nama_pelapor', 'nik_pelapor', 'alamat_pelapor', 'hubungan_pelapor', 'nik_korban', 'nama_korban', 'jk_korban', 'umur_korban', 'alamat_korban', 'nik_pelaku', 'jk_pelaku', 'umur_pelaku', 'alamat_pelaku', 'tanggal_pengaduan', 'tanggal_kejadian', 'jam_pengaduan', 'status_laporan'
    ];
    public function sluggable(): array
    {
        return [
            'slug' => [
                'source' => 'nama_pelapor'
            ]
        ];
    }
}

我的路线

<?php
use Illuminate\Auth\Events\Login;
use Illuminate\Support\Facades\Route;
use App\Http\Controllers\AuthController;
use App\Http\Controllers\UserController;
use App\Http\Controllers\RekapController;
use App\Http\Controllers\LaporanController;
use App\Http\Controllers\PetugasController;
use App\Http\Controllers\ProfileController;
use App\Http\Controllers\DashboardController;
/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/
Route::get('/', function () {
    return view('welcome');
})->middleware('auth');
Route::middleware('only_guest')->group(function () {
    Route::get('login', [AuthController::class, 'login'])->name('login');
    Route::post('login', [AuthController::class, 'authenticating']);
});
Route::middleware('auth')->group(function () {
    Route::get('logout', [AuthController::class, 'logout']);
    Route::get('dashboard', [DashboardController::class, 'index'])->middleware('only_admin');
    Route::get('petugas', [PetugasController::class, 'petugas'])->middleware('only_petugas');
    Route::get('rekaplaporan', [RekapController::class, 'index']);
    Route::get('laporan', [LaporanController::class, 'index']);
    Route::get('laporan-add', [LaporanController::class, 'add']);
    Route::post('laporan-add', [LaporanController::class, 'store']);
    Route::get('laporan-edit/{slug}', [LaporanController::class, 'edit']);
    Route::put('laporan-edit/{slug}', [LaporanController::class, 'update']);
    Route::get('user', [UserController::class, 'index']);
    Route::get('profile', [ProfileController::class, 'index']);
});

查看edit. blade.php

<div class="card-body">
                        <form action="/laporan-edit/{{ $laporan->slug }}" method="post" enctype="multipart/form-data" class="form-horizontal">
                            @csrf
                            @method('put')

我已经尝试过这种情况

public function edit($slug)
    {
        if($laporan = Laporan::where('slug', $slug)->first()){
            return view('laporan-edit', ['laporan' => $laporan]);
        } else{
            return redirect('dashboard');
        }
        // $laporan = Laporan::where('slug', $slug)->first();
        // return view('laporan-edit', ['laporan' => $laporan]);
    }

它的工作，但是，当我点击侧边栏另一个名字，然后它总是重定向http://127.0.0.1:8000/dashboard