Added AddObjectTypeExtension methods to IRequestExecutorBuilder

src/HotChocolate/Core/src/Execution/DependencyInjection/SchemaRequestExecutorBuilderExtensions.Types.cs

@@ -1540,6 +1540,62 @@ public static IRequestExecutorBuilder AddTypeExtension<TExtension>(
         return builder.ConfigureSchema(b => b.AddType<TExtension>());
     }
 
+    /// <summary>
+    /// Adds an object type extension and applies the <paramref name="configure"/> delegate.
+    /// </summary>
+    /// <param name="builder">The GraphQL configuration builder.</param>
+    /// <param name="configure">A delegate to configure the type.</param>
+    /// <typeparam name="TExtension">The extension type.</typeparam>
+    /// <returns>The GraphQL configuration builder.</returns>
+    public static IRequestExecutorBuilder AddObjectTypeExtension<TExtension>(
+        this IRequestExecutorBuilder builder,
+        Action<IObjectTypeDescriptor<TExtension>> configure)
+    {
+        return builder.ConfigureSchema(
+            b => b.AddType(new ObjectTypeExtension<TExtension>(configure)));
+    }
+
+    /// <summary>
+    /// Adds an object type extension and applies an optional <paramref name="configure"/> delegate.
+    /// </summary>
+    /// <param name="builder">The GraphQL configuration builder.</param>
+    /// <param name="configure">A delegate to configure the type.</param>
+    /// <typeparam name="TExtension">The extension type.</typeparam>
+    /// <typeparam name="TExtends">The type to extend.</typeparam>
+    /// <returns>The GraphQL configuration builder.</returns>
+    public static IRequestExecutorBuilder AddObjectTypeExtension<TExtension, TExtends>(
+        this IRequestExecutorBuilder builder,
+        Action<IObjectTypeDescriptor<TExtension>>? configure = null)
+    {
+        return builder.ConfigureSchema(
+            b => b.AddType(new ObjectTypeExtension<TExtension>(d =>
+            {
+                d.ExtendsType<TExtends>();
+                configure?.Invoke(d);
+            })));
+    }
+
+    /// <summary>
+    /// Adds an object type extension and applies an optional <paramref name="configure"/> delegate.
+    /// </summary>
+    /// <param name="builder">The GraphQL configuration builder.</param>
+    /// <param name="objectTypeName">The name of the object type to extend.</param>
+    /// <param name="configure">A delegate to configure the type.</param>
+    /// <typeparam name="TExtension">The extension type.</typeparam>
+    /// <returns>The GraphQL configuration builder.</returns>
+    public static IRequestExecutorBuilder AddObjectTypeExtension<TExtension>(
+        this IRequestExecutorBuilder builder,
+        string objectTypeName,
+        Action<IObjectTypeDescriptor<TExtension>>? configure = null)
+    {
+        return builder.ConfigureSchema(
+            b => b.AddType(new ObjectTypeExtension<TExtension>(d =>
+            {
+                d.Name(objectTypeName);
+                configure?.Invoke(d);
+            })));
+    }
+
     public static IRequestExecutorBuilder BindRuntimeType<TRuntimeType, TSchemaType>(
         this IRequestExecutorBuilder builder)
         where TSchemaType : INamedType

src/HotChocolate/Core/test/Types.Tests/Types/ObjectTypeExtensionTests.cs

@@ -749,6 +749,49 @@ public async Task ExtendObjectTypeAttribute_Extends_SchemaType()
         SnapshotExtensions.MatchSnapshot(schema);
     }
 
+    [Fact]
+    public async Task AddObjectTypeExtension1_Extends_SchemaType()
+    {
+        var schema =
+            await new ServiceCollection()
+                .AddGraphQL()
+                .AddQueryType<QueryType>()
+                .AddObjectTypeExtension<QueryExtensions2>(
+                    d => d.ExtendsType<QueryType>().Field("foo").Type<IntType>())
+                .BuildSchemaAsync();
+
+        SnapshotExtensions.MatchSnapshot(schema);
+    }
+
+    [Fact]
+    public async Task AddObjectTypeExtension2_Extends_SchemaType()
+    {
+        var schema =
+            await new ServiceCollection()
+                .AddGraphQL()
+                .AddQueryType<QueryType>()
+                .AddObjectTypeExtension<QueryExtensions2, QueryType>(
+                    d => d.Field("foo").Type<IntType>())
+                .BuildSchemaAsync();
+
+        SnapshotExtensions.MatchSnapshot(schema);
+    }
+
+    [Fact]
+    public async Task AddObjectTypeExtension3_Extends_SchemaType()
+    {
+        var schema =
+            await new ServiceCollection()
+                .AddGraphQL()
+                .AddQueryType<QueryType>()
+                .AddObjectTypeExtension<QueryExtensions2>(
+                    "Query",
+                    d => d.Field("foo").Type<IntType>())
+                .BuildSchemaAsync();
+
+        SnapshotExtensions.MatchSnapshot(schema);
+    }
+
     public class FooType : ObjectType<Foo>
     {
         protected override void Configure(IObjectTypeDescriptor<Foo> descriptor)
@@ -1147,6 +1190,11 @@ public class QueryExtensions
     {
         public string Bar() => "baz";
     }
+
+    public class QueryExtensions2
+    {
+        public int AddedField { get; set; }
+    }
 }
 
 #pragma warning restore RCS1102 // Make class static

src/HotChocolate/Core/test/Types.Tests/Types/__snapshots__/ObjectTypeExtensionTests.AddObjectTypeExtension1_Extends_SchemaType.graphql

@@ -0,0 +1,8 @@
+schema {
+  query: Query
+}
+
+type Query {
+  foo: Int
+  addedField: Int!
+}

src/HotChocolate/Core/test/Types.Tests/Types/__snapshots__/ObjectTypeExtensionTests.AddObjectTypeExtension2_Extends_SchemaType.graphql

@@ -0,0 +1,8 @@
+schema {
+  query: Query
+}
+
+type Query {
+  foo: Int
+  addedField: Int!
+}

src/HotChocolate/Core/test/Types.Tests/Types/__snapshots__/ObjectTypeExtensionTests.AddObjectTypeExtension3_Extends_SchemaType.graphql

@@ -0,0 +1,8 @@
+schema {
+  query: Query
+}
+
+type Query {
+  foo: Int
+  addedField: Int!
+}