Fix nested sorting a new approach QueryContext

src/HotChocolate/Data/src/Data/Sorting/Context/SortingContext.cs

@@ -184,18 +184,25 @@ protected override ISyntaxVisitorAction Leave(
             Context context)
         {
             var type = context.Types.Peek();
-            var field = (SortField)type.Fields[node.Name.Value];
-            var fieldType = field.Type.NamedType();
-            var expression = context.Parents.Pop();
 
-            if (fieldType.IsInputObjectType())
+            if (type.Fields.TryGetField(node.Name.Value, out var inputField) && inputField is SortField sortField)
             {
-                context.Types.Pop();
+                var fieldType = sortField.Type.NamedType();
+                var expression = context.Parents.Pop();
+
+                if (fieldType.IsInputObjectType())
+                {
+                    context.Types.Pop();
+                }
+                else
+                {
+                    var ascending = node.Value.Value?.Equals("ASC") ?? true;
+                    context.Completed.Add((expression, ascending, sortField.Member!.GetReturnType()));
+                }
             }
             else
             {
-                var ascending = node.Value.Value?.Equals("ASC") ?? true;
-                context.Completed.Add((expression, ascending, field.Member!.GetReturnType()));
+                context.Types.Pop();
             }
 
             return base.Leave(node, context);

src/HotChocolate/Data/test/Data.Sorting.Tests/IntegrationTests.cs

@@ -1,5 +1,7 @@
+using GreenDonut.Data;
 using HotChocolate.Execution;
 using HotChocolate.Types;
+using HotChocolate.Types.Pagination;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace HotChocolate.Data.Tests;
@@ -30,6 +32,34 @@ public async Task Sorting_Should_Work_When_UsedWithNonNullDateTime()
         // assert
         result.MatchSnapshot();
     }
+
+    [Fact]
+    public async Task Sorting_Should_Work_When_Nested()
+    {
+        // arrange
+        var executor = await new ServiceCollection()
+            .AddGraphQL()
+            .AddQueryType<Query>()
+            .AddSorting()
+            .BuildRequestExecutorAsync();
+
+        const string query = @"
+        {
+            books(order: [{ author: { name: ASC } }]) {
+                title
+                author {
+                    name
+                }
+            }
+        }
+        ";
+
+        // act
+        var result = await executor.ExecuteAsync(query);
+
+        // assert
+        result.MatchSnapshot();
+    }
 }
 
 public class Query
@@ -41,10 +71,35 @@ public IEnumerable<Foo> Foos() => new[]
         new Foo { CreatedUtc = new DateTime(2010, 1, 1, 1, 1, 1), },
         new Foo { CreatedUtc = new DateTime(2020, 1, 1, 1, 1, 1), },
     };
+
+    [UseSorting]
+    public IEnumerable<Book> GetBooks(QueryContext<Book> queryContext)
+        => new[]
+            {
+                new Book { Title = "Book5", Author = new Author { Name = "Author6" } },
+                new Book { Title = "Book7", Author = new Author { Name = "Author17" } },
+                new Book { Title = "Book1", Author = new Author { Name = "Author5" } },
+            }
+            .AsQueryable()
+            .With(queryContext);
 }
 
 public class Foo
 {
     [GraphQLType(typeof(NonNullType<DateType>))]
     public DateTime CreatedUtc { get; set; }
 }
+
+public class Author
+{
+    public string Name { get; set; } = string.Empty;
+
+    [UseSorting]
+    public Book[] Books { get; set; } = Array.Empty<Book>();
+}
+
+public class Book
+{
+    public string Title { get; set; } = string.Empty;
+    public Author? Author { get; set; }
+}

src/HotChocolate/Data/test/Data.Sorting.Tests/__snapshots__/IntegrationTests.Sorting_Should_Work_When_Nested.snap

@@ -0,0 +1,24 @@
+{
+  "data": {
+    "books": [
+      {
+        "title": "Book7",
+        "author": {
+          "name": "Author17"
+        }
+      },
+      {
+        "title": "Book1",
+        "author": {
+          "name": "Author5"
+        }
+      },
+      {
+        "title": "Book5",
+        "author": {
+          "name": "Author6"
+        }
+      }
+    ]
+  }
+}