$article['slug'] === $slug); if(! $article ) { abort(404); } return $article; } public static function findById(string $id): array { $article = Arr::first(Article::all(), fn($article) => $article['id'] === $id); if(! $article ) { abort(404); } return $article; } public function user_id() { return $this->belongsTo(User::class); } }