Refactor Factory

Hi all,

I'm learning to use Factories and came up with the code below.

I would like to have your opinion about if this is the 'cleanest' way of writing it.

User::factory()->count(30)->create()->each(function(User $user) {
            $user->posts()->saveMany(
                Post::factory()
                    ->count(10)
                    ->create()
                    ->each(function(Post $post) {
                        $category = Category::inRandomOrder()->first();
                        $post->categories()->attach($post->id,[
                            'category_id' => $category->id,
                            'created_at' => Carbon::now(),
                            'updated_at' => Carbon::now(),
                        ]);
                    })
            );
        });