public function show(\App\Article $article)
 {
     $article->increment('view_count', 1);
     if ($article->id == DB::table('articles')->first()->id) {
         $previous = $article->photo;
     } else {
         $previous = \App\Article::where('id', '<', $article->id)->orderBy('id', 'desc')->firstOrFail()->photo;
     }
     if ($article->id == DB::table('articles')->orderBy('id', 'desc')->first()->id) {
         $next = $article->photo;
     } else {
         $next = \App\Article::where('id', '>', $article->id)->orderBy('id', 'asc')->firstOrFail()->photo;
     }
     return view('articles.show', compact('article', 'previous', 'next'));
 }
 public function show(Article $article)
 {
     $comments = $article->comments()->with('user')->recent()->simplePaginate(10);
     $article->increment('view_count');
     return view('articles.show', compact('article', 'comments'));
 }