I got route not defined when run make:controller controller_name --resource - php

Question

web.php
<?php
use Illuminate\Support\Facades\Route;
use App\Http\Controllers\HomeController;
use App\Http\Controllers\PostsController;
use App\Http\Controllers\AboutController;
use App\Http\Controllers\ContactController;
use App\Http\Controllers\CategoryController;
use App\Http\Controllers\TagController;
use App\Http\Controllers\AdminControllers\DashboardController;
use App\Http\Controllers\AdminControllers\AdminPostsController;
use App\Http\Controllers\AdminControllers\AdminCategoriesController;
use App\Http\Controllers\AdminControllers\TinyMCEController;
/*
|--------------------------------------------------------------------------
| 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('/', [HomeController::class,'index'])->name("home");
Route::get('/posts/{post:slug}',[PostsController::class,'show'])->name("posts.show");
Route::post('/posts/{post:slug}',[PostsController::class,'addComment'])->name("posts.add_comment");
Route::get('/contact', [ContactController::class , 'create'])->name("contact.create");
Route::post('/contact', [ContactController::class , 'store'])->name("contact.store");
Route::get('/about', AboutController::class)->name("about");
Route::get('/categories/{category:slug}',[CategoryController::class,'show'])->name("categories.show");
Route::get('/categories',[CategoryController::class,'index'])->name("categories.index");
/// /tags/{tag:slug} === SHOULD BE /tags/{tag:name}
Route::get('/tags/{tag:name}',[TagController::class,'show'])->name("tags.show");
// Admin Dashboard
//Route::get('/admin',[DashboardController::class,'index'])->name("admin.index");
Route::prefix('admin')->name('admin.')->middleware(['auth','isadmin'])->group(function(){
Route::get('/',[DashboardController::class,'index'])->name("index");
Route::post('upload_tinymce_image',[TinyMCEController::class,'upload_tinymce_image'])->name('upload_tinymce_image');
Route::resource('posts',AdminPostsController::class);
Route::resource('categories',AdminCategoriesController::class);
});
require __DIR__.'/auth.php';
AdminCategoriesController.php
<?php
namespace App\Http\Controllers\AdminControllers;
use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;
use App\Models\Category;
class AdminCategoriesController extends Controller
{
public function index()
{
return view('dashboard.categories.index');
}
public function create()
{
return view('dashboard.categories.create');
}
public function store(Request $request)
{
}
public function show(Category $category)
{
return view('dashboard.categories.show', [
'category' => $category
]);
}
public function edit(Category $category)
{
return view('dashboard.categories.edit', [
'category' => $category
]);
}
public function update(Request $request, Category $category)
{
}
public function destroy(Category $category)
{
}
}
nav.blade.php
<!--sidebar wrapper -->
<div class="sidebar-wrapper" data-simplebar="true">
<div class="sidebar-header">
<div>
<img src="{{asset('assets/images/logo-icon.png')}}" class="logo-icon" alt="logo icon">
</div>
<div>
<h4 class="logo-text">MYBLOG</h4>
</div>
<div class="toggle-icon ms-auto"><i class='bx bx-arrow-to-left'></i>
</div>
</div>
<!--navigation-->
<ul class="metismenu" id="menu">
<li>
<a href="" target="_blank">
<div class="parent-icon"><i class='bx bx-home-circle'></i></div>
<div class="menu-title">Dashboard</div>
</a>
</li>
<li>
<a href="javascript:;" class="has-arrow">
<div class="parent-icon"><i class='bx bx-message-square-edit'></i>
</div>
<div class="menu-title">Posts</div>
</a>
<ul>
<li> <i class="bx bx-right-arrow-alt"></i>All Posts
</li>
<li> <i class="bx bx-right-arrow-alt"></i>Add New Post
</li>
</ul>
</li>
<li>
<a href="" class="has-arrow">
<div class="parent-icon"><i class='bx bx-menu'></i>
</div>
<div class="menu-title">Categories</div>
</a>
<ul>
<li> <i class="bx bx-right-arrow-alt"></i>All Categories
</li>
<li> <i class="bx bx-right-arrow-alt"></i>Add New Category
</li>
</ul>
</li>
</ul>
<!--end navigation-->
</div>
<!--end sidebar wrapper -->
I develop a blog and I have a resource controller for posts and worked fine when I created another one for categories gave my that error "Route [admin.categories.index] not defined." .
Just I put the route in dashboard the error raise and gone if I commented the two routes for categories in nav.blade.php file

Answer 1

According to Laravel 9 Documentation
Route::resources([
'posts' => AdminPostsController::class,
'categories'=> AdminCategoriesController::class
]);
then I ran php artisan route:clear.
finally the routes appears.