レッスン 2: ルーティング、コントローラー、ミドルウェア

Laravel: 基本から上級まで

パート 1: Laravel の基礎

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1. ルーティング

// routes/web.php
use App\Http\Controllers\ProductController;

Route::get('/', fn () => view('welcome'));

// Route parameters
Route::get('/products/{product}', [ProductController::class, 'show']);
Route::get('/categories/{category}/products', [ProductController::class, 'byCategory']);

// Optional parameters
Route::get('/search/{query?}', [ProductController::class, 'search']);

// Named routes
Route::get('/dashboard', [DashboardController::class, 'index'])->name('dashboard');

// Route groups
Route::prefix('api/v1')->middleware('auth:sanctum')->group(function () {
    Route::apiResource('products', ProductController::class);
    Route::apiResource('orders', OrderController::class);
});

2. コントローラー

namespace App\Http\Controllers;

use App\Models\Product;
use Illuminate\Http\Request;

class ProductController extends Controller
{
    public function index()
    {
        $products = Product::with('category')
            ->where('is_active', true)
            ->paginate(20);

        return view('products.index', compact('products'));
    }

    public function show(Product $product) // Route model binding
    {
        return view('products.show', compact('product'));
    }

    public function store(Request $request)
    {
        $validated = $request->validate([
            'name' => 'required|string|max:255',
            'price' => 'required|numeric|min:0',
        ]);

        $product = Product::create($validated);
        return redirect()->route('products.show', $product);
    }
}

3. リソースコントローラー

php artisan make:controller ProductController --resource --model=Product

// index, create, store, show, edit, update, destroy
Route::resource('products', ProductController::class);

// API only (no create, edit)
Route::apiResource('products', ProductController::class);

4. ミドルウェア

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;

class EnsureIsAdmin
{
    public function handle(Request $request, Closure $next)
    {
        if ($request->user()?->role !== 'admin') {
            abort(403, 'Unauthorized');
        }
        return $next($request);
    }
}

// bootstrap/app.php (Laravel 11)
->withMiddleware(function (Middleware $middleware) {
    $middleware->alias([
        'admin' => EnsureIsAdmin::class,
    ]);
})

// Sử dụng
Route::middleware('admin')->group(function () {
    Route::get('/admin/dashboard', ...);
});

5. レート制限

// bootstrap/app.php
use Illuminate\Cache\RateLimiting\Limit;

RateLimiter::for('api', function (Request $request) {
    return Limit::perMinute(60)->by($request->user()?->id ?: $request->ip());
});

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