Backport pull request #18039 from jellyfin/release-12.z

Stop resolving items with every field where only stored columns are read

Original-merge: 408e5e01b1

Merged-by: crobibero <cody@robibe.ro>

Backported-by: Cody Robibero <cody@robibe.ro>

MediaBrowser.Controller/Dto/DtoOptions.cs

@@ -46,6 +46,20 @@ namespace MediaBrowser.Controller.Dto
             ImageTypes = AllImageTypes;
         }
 
+        /// <summary>
+        /// Gets options that populate nothing beyond the item's own stored columns.
+        /// </summary>
+        /// <remarks>
+        /// Each enabled field group is a collection the item query left-joins, so the rows returned are
+        /// the product of the item's provider, image and user data counts. Never use this for items that
+        /// get saved back: saving rewrites the owned rows from what the instance holds.
+        /// </remarks>
+        public static DtoOptions StoredColumnsOnly => new(false)
+        {
+            EnableImages = false,
+            EnableUserData = false
+        };
+
         /// <summary>
         /// Gets or sets the fields to populate on the DTO.
         /// </summary>

MediaBrowser.Controller/Entities/Folder.cs

@@ -1687,7 +1687,17 @@ namespace MediaBrowser.Controller.Entities
         /// <returns>IEnumerable{BaseItem}.</returns>
         public List<BaseItem> GetLinkedChildren()
         {
-            var resolved = ResolveLinkedChildren(LinkedChildren);
+            return GetLinkedChildren(new DtoOptions());
+        }
+
+        /// <summary>
+        /// Gets the linked children, populating only what <paramref name="options"/> asks for.
+        /// </summary>
+        /// <param name="options">Fields to populate on the resolved children.</param>
+        /// <returns>The resolved children.</returns>
+        public List<BaseItem> GetLinkedChildren(DtoOptions options)
+        {
+            var resolved = ResolveLinkedChildren(LinkedChildren, options);
             var list = new List<BaseItem>(resolved.Count);
             foreach (var (_, item) in resolved)
             {
@@ -1804,8 +1814,9 @@ namespace MediaBrowser.Controller.Entities
         /// path (legacy path-based resolution).
         /// </summary>
         /// <param name="linkedChildren">Linked children to resolve.</param>
+        /// <param name="options">Fields to populate on the resolved items; all fields when null.</param>
         /// <returns>Each input entry paired with its resolved item; entries that fail to resolve are dropped.</returns>
-        private List<(LinkedChild Info, BaseItem Item)> ResolveLinkedChildren(IReadOnlyList<LinkedChild> linkedChildren)
+        private List<(LinkedChild Info, BaseItem Item)> ResolveLinkedChildren(IReadOnlyList<LinkedChild> linkedChildren, DtoOptions options = null)
         {
             var resolved = new List<(LinkedChild Info, BaseItem Item)>(linkedChildren.Count);
             if (linkedChildren.Count == 0)
@@ -1827,7 +1838,8 @@ namespace MediaBrowser.Controller.Entities
             {
                 var batched = LibraryManager.GetItemList(new InternalItemsQuery
                 {
-                    ItemIds = [.. idsToBatch]
+                    ItemIds = [.. idsToBatch],
+                    DtoOptions = options ?? new DtoOptions()
                 });
                 byId = new Dictionary<Guid, BaseItem>(batched.Count);
                 foreach (var item in batched)

MediaBrowser.Controller/Entities/Movies/BoxSet.cs

@@ -11,6 +11,7 @@ using Jellyfin.Data;
 using Jellyfin.Data.Enums;
 using Jellyfin.Database.Implementations.Entities;
 using Jellyfin.Database.Implementations.Enums;
+using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Providers;
 using MediaBrowser.Model.Querying;
 
@@ -89,7 +90,7 @@ namespace MediaBrowser.Controller.Entities.Movies
                 return base.GetNonCachedChildren(directoryService);
             }
 
-            return Enumerable.Empty<BaseItem>();
+            return [];
         }
 
         protected override IReadOnlyList<BaseItem> LoadChildren()
@@ -172,7 +173,7 @@ namespace MediaBrowser.Controller.Entities.Movies
             var libraryFolderIds = LibraryFolderIds;
             if (libraryFolderIds is null)
             {
-                linkedItems = GetLinkedChildren();
+                linkedItems = GetLinkedChildren(DtoOptions.StoredColumnsOnly);
                 libraryFolderIds = GetLibraryFolderIds(linkedItems);
             }
 
@@ -191,7 +192,7 @@ namespace MediaBrowser.Controller.Entities.Movies
             // If user has parental controls, hide the BoxSet when all children are restricted
             if (user.MaxParentalRatingScore.HasValue)
             {
-                linkedItems ??= GetLinkedChildren();
+                linkedItems ??= GetLinkedChildren(DtoOptions.StoredColumnsOnly);
                 if (linkedItems.Count > 0 && linkedItems.All(child => !child.IsParentalAllowed(user, true)))
                 {
                     return false;
@@ -248,7 +249,7 @@ namespace MediaBrowser.Controller.Entities.Movies
 
         public Guid[] GetLibraryFolderIds()
         {
-            return GetLibraryFolderIds(GetLinkedChildren());
+            return GetLibraryFolderIds(GetLinkedChildren(DtoOptions.StoredColumnsOnly));
         }
 
         private Guid[] GetLibraryFolderIds(IEnumerable<BaseItem> linkedChildren)
@@ -280,13 +281,13 @@ namespace MediaBrowser.Controller.Entities.Movies
                 {
                     expandedFolders.Add(item.Id);
 
-                    return FlattenItems(boxset.GetLinkedChildren(), expandedFolders);
+                    return FlattenItems(boxset.GetLinkedChildren(DtoOptions.StoredColumnsOnly), expandedFolders);
                 }
 
-                return Array.Empty<BaseItem>();
+                return [];
             }
 
-            return new[] { item };
+            return [item];
         }
     }
 }