【Laravel】ページネーションの2ページ目以降にクエリパラメータを引き継がせる方法

$products = Product::select('id', 'name', 'price', 'image');
$products_list = $products->paginate(10);

return view('product_list', compact('products_list'));

@foreach ($products_list as $product)
  // 表示処理
@endforeach

{{ $products_list->links('vendor.pagination.bootstrap-5') }}

$category_id = (int)$request->category_id; // カテゴリIDをクエリパラメータから取得

$conditions = [];
if ($category_id) {
  $conditions[] = ['category_id', '=', $category_id];
}

$products = Product::select('id', 'name', 'price', 'image')
  ->where($conditions); // 条件追加

$products_list = $products->paginate(10);

return view('product_list', compact('products_list'));

$category_id = (int)$request->category_id;

$conditions = [];
$append_param = []; // 追加

if ($category_id) {
  $conditions[] = ['category_id', '=', $category_id];
  $append_param['category_id'] = $category_id; // 追加
}

$products = Product::select('id', 'name', 'price', 'image')
  ->where($conditions);

$products_list = $products->paginate(10);

// 2ページ目以降にパラメーターを引き継ぐ
$products_list->appends($append_param); // 追加

return view('product_list', compact('products_list'));