Fix series DateLastMediaAdded not updating when new episodes are added (#15472)

MediaBrowser.Providers/Manager/MetadataService.cs

@@ -317,12 +317,8 @@ namespace MediaBrowser.Providers.Manager
         {
             if (EnableUpdateMetadataFromChildren(item, isFullRefresh, updateType))
             {
-                if (isFullRefresh || updateType > ItemUpdateType.None)
-                {
-                    var children = GetChildrenForMetadataUpdates(item);
-
-                    updateType = UpdateMetadataFromChildren(item, children, isFullRefresh, updateType);
-                }
+                var children = GetChildrenForMetadataUpdates(item);
+                updateType = UpdateMetadataFromChildren(item, children, isFullRefresh, updateType);
             }
 
             var presentationUniqueKey = item.CreatePresentationUniqueKey();
@@ -365,16 +361,24 @@ namespace MediaBrowser.Providers.Manager
 
         protected virtual bool EnableUpdateMetadataFromChildren(TItemType item, bool isFullRefresh, ItemUpdateType currentUpdateType)
         {
-            if (isFullRefresh || currentUpdateType > ItemUpdateType.None)
+            if (item is Folder folder)
             {
-                if (EnableUpdatingPremiereDateFromChildren || EnableUpdatingGenresFromChildren || EnableUpdatingStudiosFromChildren || EnableUpdatingOfficialRatingFromChildren)
+                if (!isFullRefresh && currentUpdateType == ItemUpdateType.None)
                 {
-                    return true;
+                    return folder.SupportsDateLastMediaAdded;
                 }
 
-                if (item is Folder folder)
+                if (isFullRefresh || currentUpdateType > ItemUpdateType.None)
                 {
-                    return folder.SupportsDateLastMediaAdded || folder.SupportsCumulativeRunTimeTicks;
+                    if (EnableUpdatingPremiereDateFromChildren || EnableUpdatingGenresFromChildren || EnableUpdatingStudiosFromChildren || EnableUpdatingOfficialRatingFromChildren)
+                    {
+                        return true;
+                    }
+
+                    if (folder.SupportsDateLastMediaAdded || folder.SupportsCumulativeRunTimeTicks)
+                    {
+                        return true;
+                    }
                 }
             }
 
@@ -395,36 +399,42 @@ namespace MediaBrowser.Providers.Manager
         {
             var updateType = ItemUpdateType.None;
 
-            if (isFullRefresh || currentUpdateType > ItemUpdateType.None)
+            if (item is Folder folder)
             {
-                updateType |= UpdateCumulativeRunTimeTicks(item, children);
-                updateType |= UpdateDateLastMediaAdded(item, children);
-
-                // don't update user-changeable metadata for locked items
-                if (item.IsLocked)
+                if (folder.SupportsDateLastMediaAdded)
                 {
-                    return updateType;
+                    updateType |= UpdateDateLastMediaAdded(item, children);
                 }
 
-                if (EnableUpdatingPremiereDateFromChildren)
+                if ((isFullRefresh || currentUpdateType > ItemUpdateType.None) && folder.SupportsCumulativeRunTimeTicks)
                 {
-                    updateType |= UpdatePremiereDate(item, children);
+                    updateType |= UpdateCumulativeRunTimeTicks(item, children);
                 }
+            }
 
-                if (EnableUpdatingGenresFromChildren)
-                {
-                    updateType |= UpdateGenres(item, children);
-                }
+            if (!(isFullRefresh || currentUpdateType > ItemUpdateType.None) || item.IsLocked)
+            {
+                return updateType;
+            }
 
-                if (EnableUpdatingStudiosFromChildren)
-                {
-                    updateType |= UpdateStudios(item, children);
-                }
+            if (EnableUpdatingPremiereDateFromChildren)
+            {
+                updateType |= UpdatePremiereDate(item, children);
+            }
 
-                if (EnableUpdatingOfficialRatingFromChildren)
-                {
-                    updateType |= UpdateOfficialRating(item, children);
-                }
+            if (EnableUpdatingGenresFromChildren)
+            {
+                updateType |= UpdateGenres(item, children);
+            }
+
+            if (EnableUpdatingStudiosFromChildren)
+            {
+                updateType |= UpdateStudios(item, children);
+            }
+
+            if (EnableUpdatingOfficialRatingFromChildren)
+            {
+                updateType |= UpdateOfficialRating(item, children);
             }
 
             return updateType;