public static function getPostsByFollowingUserId($user_id)
 {
     if (isset($user_id)) {
         $list_id = FollowEvent::where('follower_id', $user_id)->get(['following_id']);
         return UserPosts::whereIn('user_id', $list_id)->get();
     }
 }
 public static function getPosts($post_id)
 {
     $photo_id = Post::where('post_id', $post_id)->get(['photo_link'])[0]["photo_link"];
     $list_id = PostRecommendView::where("photo_id", $photo_id)->orderBy("rank", "desc")->take(10)->get(["post_id_recommend"]);
     $results = UserPosts::whereIn("post_id", $list_id)->distinct('photo_link')->get();
     return $results;
 }
 public static function getPosts($post_id)
 {
     $list_id = PostRecommend::where("post_id", $post_id)->orderBy("rank", "desc")->take(10)->get(["post_id_recommend"]);
     $results = UserPosts::whereIn("post_id", $list_id)->get();
     return $results;
 }