Laravel5 Eloquent Relationship using Cache

Article and User has many to one relationship

$article_no_user = Cache::remember("article_no_user_{$id}", 5, function() use ($id) {
  return Article::find($id)->first();
});
echo $article_no_user->user->name;  //event article cached, this will query user table every time

$article = Cache::remember("article_{$id}", 5, function() use ($id) {
  return Article::with('user')->find($id)->first();
});
echo $article->user->name; //this will use cache