backend/app/User/Controllers/CityController.php

@@ -4,15 +4,21 @@ namespace App\User\Controllers;
 
 use App\Http\Controllers\Controller;
 use App\Models\City;
+use App\Models\Province;
 use App\Traits\ApiResponse;
 use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Request;
 
 class CityController extends Controller
 {
     use ApiResponse;
 
-    public function list(): JsonResponse
+    public function list(Request $request): JsonResponse
     {
-        return response()->json(City::all(['id', 'name']));
+        $cities = City::query()
+            ->where('province_id', '=', $request->query('province_id'))
+            ->get(['id', 'name']);
+
+        return $this->successResponse($cities);
     }
 }

backend/app/User/Controllers/ProvinceController.php

@@ -12,6 +12,6 @@ class ProvinceController extends Controller
     use ApiResponse;
     public function list(): JsonResponse
     {
-        return response()->json(Province::all(['id', 'name']));
+        return $this->successResponse(Province::all(['id', 'name']));
     }
 }