🧩 Model Dosyaları

app/Models/Department.php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Factories\HasFactory;

class Department extends Model
{
    use HasFactory;

    protected $fillable = ['name'];

    // Bir departmanın birçok kullanıcısı olabilir
    public function users()
    {
        return $this->hasMany(User::class);
    }
}

app/Models/User.php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Factories\HasFactory;

class User extends Model
{
    use HasFactory;

    protected $fillable = ['name', 'email', 'department_id'];

    // Kullanıcı bir departmana aittir
    public function department()
    {
        return $this->belongsTo(Department::class);
    }
}

⚙️ Controller

app/Http/Controllers/DepartmentController.php

namespace App\Http\Controllers;

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

class DepartmentController extends Controller
{
    // Tüm departmanları listele
    public function index()
    {
        $departments = Department::with('users')->get();
        return response()->json($departments);
    }

    // Yeni departman oluştur
    public function store(Request $request)
    {
        $validated = $request->validate([
            'name' => 'required|string|max:100',
        ]);

        $department = Department::create($validated);

        return response()->json($department, 201);
    }

    // Belirli bir departmanı göster
    public function show($id)
    {
        // 👇 Burada findOrFail kullanıyoruz
        $department = Department::with('users')->findOrFail($id);

        return response()->json($department);
    }

    // Departmanı sil
    public function destroy($id)
    {
        $department = Department::findOrFail($id);
        $department->delete();

        return response()->json(['message' => 'Departman silindi.']);
    }
}

🛣️ Route Tanımı

routes/api.php

use App\Http\Controllers\DepartmentController;

Route::apiResource('departments', DepartmentController::class);

🧠 Kısa Özet

💬 Gerçek kullanım örneği:

GET /api/departments/5

Eğer id = 5 yoksa:

{
  "message": "No query results for model [App\\Models\\Department] 5"
}

ve HTTP 404 döner.