1 files changed, 30 insertions, 2 deletions

diff --git a/MediaBrowser.Providers/Playlists/PlaylistMetadataService.cs b/MediaBrowser.Providers/Playlists/PlaylistMetadataService.cs
index 235fd8c8a..c4ea106fb 100644
--- a/MediaBrowser.Providers/Playlists/PlaylistMetadataService.cs
+++ b/MediaBrowser.Providers/Playlists/PlaylistMetadataService.cs
@@ -1,4 +1,5 @@
-using MediaBrowser.Controller.Configuration;
+using System;
+using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Playlists;
 using MediaBrowser.Controller.Providers;
@@ -6,7 +7,7 @@ using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.Logging;
 using MediaBrowser.Providers.Manager;
 using System.Collections.Generic;
-
+using System.Linq;
 using MediaBrowser.Controller.IO;
 using MediaBrowser.Model.IO;
 
@@ -33,6 +34,33 @@ namespace MediaBrowser.Providers.Playlists
             }
         }
 
+        protected override ItemUpdateType BeforeSave(Playlist item, bool isFullRefresh, ItemUpdateType currentUpdateType)
+        {
+            var updateType = base.BeforeSave(item, isFullRefresh, currentUpdateType);
+
+            if (isFullRefresh || currentUpdateType > ItemUpdateType.None)
+            {
+                if (!item.IsLocked && !item.LockedFields.Contains(MetadataFields.Genres))
+                {
+                    var items = item.GetLinkedChildren()
+                        .ToList();
+
+                    var currentList = item.Genres.ToList();
+
+                    item.Genres = items.SelectMany(i => i.Genres)
+                        .Distinct(StringComparer.OrdinalIgnoreCase)
+                        .ToList();
+
+                    if (currentList.Count != item.Genres.Count || !currentList.OrderBy(i => i).SequenceEqual(item.Genres.OrderBy(i => i), StringComparer.OrdinalIgnoreCase))
+                    {
+                        updateType = updateType | ItemUpdateType.MetadataEdit;
+                    }
+                }
+            }
+
+            return updateType;
+        }
+
         public PlaylistMetadataService(IServerConfigurationManager serverConfigurationManager, ILogger logger, IProviderManager providerManager, IFileSystem fileSystem, IUserDataManager userDataManager, ILibraryManager libraryManager) : base(serverConfigurationManager, logger, providerManager, fileSystem, userDataManager, libraryManager)
         {
         }