Upgrade Hot Chocolate to latest -rc for version 16.0.0

src/Core/Parsers/IntrospectionInterceptor.cs

@@ -5,6 +5,7 @@
 using HotChocolate.AspNetCore;
 using HotChocolate.Execution;
 using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.DependencyInjection;
 
 namespace Azure.DataApiBuilder.Core.Parsers
 {
@@ -14,17 +15,18 @@ namespace Azure.DataApiBuilder.Core.Parsers
     /// </summary>
     public class IntrospectionInterceptor : DefaultHttpRequestInterceptor
     {
-        private RuntimeConfigProvider _runtimeConfigProvider;
-
         /// <summary>
-        /// Constructor injects RuntimeConfigProvider to allow
-        /// HotChocolate to attempt to retrieve the runtime config
-        /// when evaluating GraphQL requests.
+        /// Parameterless constructor.
         /// </summary>
-        /// <param name="runtimeConfigProvider"></param>
-        public IntrospectionInterceptor(RuntimeConfigProvider runtimeConfigProvider)
+        /// <remarks>
+        /// Hot Chocolate v16 isolates schema services from the application's request services.
+        /// Resolving constructor-injected app singletons (e.g. <see cref="RuntimeConfigProvider"/>)
+        /// against the schema service provider therefore fails at executor session creation.
+        /// We instead resolve dependencies from <see cref="HttpContext.RequestServices"/> in
+        /// <see cref="OnCreateAsync"/>, where the application's request scope is in effect.
+        /// </remarks>
+        public IntrospectionInterceptor()
         {
-            _runtimeConfigProvider = runtimeConfigProvider;
         }
 
         /// <summary>
@@ -51,7 +53,10 @@ public override ValueTask OnCreateAsync(
             OperationRequestBuilder requestBuilder,
             CancellationToken cancellationToken)
         {
-            if (_runtimeConfigProvider.GetConfig().AllowIntrospection)
+            RuntimeConfigProvider runtimeConfigProvider =
+                context.RequestServices.GetRequiredService<RuntimeConfigProvider>();
+
+            if (runtimeConfigProvider.GetConfig().AllowIntrospection)
             {
                 requestBuilder.AllowIntrospection();
             }

src/Core/Resolvers/CosmosQueryStructure.cs

@@ -117,14 +117,15 @@ private static IEnumerable<LabelledColumn> GenerateQueryColumns(SelectionSetNode
         [MemberNotNull(nameof(OrderByColumns))]
         private void Init(IDictionary<string, object?> queryParams)
         {
-            ISelection selection = _context.Selection;
+            Selection selection = _context.Selection;
             ObjectType underlyingType = selection.Field.Type.NamedType<ObjectType>();
 
             IsPaginated = QueryBuilder.IsPaginationType(underlyingType);
             OrderByColumns = new();
+            FieldNode selectionFieldNode = selection.RequireFieldNode();
             if (IsPaginated)
             {
-                FieldNode? fieldNode = ExtractQueryField(selection.SyntaxNode);
+                FieldNode? fieldNode = ExtractQueryField(selectionFieldNode);
 
                 if (fieldNode is not null)
                 {
@@ -139,7 +140,7 @@ private void Init(IDictionary<string, object?> queryParams)
             }
             else
             {
-                Columns.AddRange(GenerateQueryColumns(selection.SyntaxNode.SelectionSet!, _context.Operation.Document, SourceAlias));
+                Columns.AddRange(GenerateQueryColumns(selectionFieldNode.SelectionSet!, _context.Operation.Document, SourceAlias));
                 string typeName = GraphQLUtils.TryExtractGraphQLFieldModelName(underlyingType.Directives, out string? modelName) ?
                     modelName :
                     underlyingType.Name;

src/Core/Resolvers/Sql Query Structures/SqlQueryStructure.cs

@@ -126,7 +126,7 @@ public SqlQueryStructure(
                 sqlMetadataProvider,
                 authorizationResolver,
                 ctx.Selection.Field,
-                ctx.Selection.SyntaxNode,
+                ctx.Selection.RequireFieldNode(),
                 // The outermost query is where we start, so this can define
                 // create the IncrementingInteger that will be shared between
                 // all subqueries in this query.
@@ -173,7 +173,7 @@ public SqlQueryStructure(
             IsMultipleCreateOperation = isMultipleCreateOperation;
 
             ObjectField schemaField = _ctx.Selection.Field;
-            FieldNode? queryField = _ctx.Selection.SyntaxNode;
+            FieldNode? queryField = _ctx.Selection.RequireFieldNode();
 
             IOutputType outputType = schemaField.Type;
             _underlyingFieldType = outputType.NamedType<ObjectType>();

src/Core/Services/DetermineStatusCodeMiddleware.cs

@@ -35,7 +35,7 @@ public async ValueTask InvokeAsync(RequestContext context)
                 }
 
                 contextData[ExecutionContextData.HttpStatusCode] = HttpStatusCode.BadRequest;
-                context.Result = singleResult.WithContextData(contextData.ToImmutable());
+                singleResult.ContextData = contextData.ToImmutable();
             }
         }
     }

src/Core/Services/ExecutionHelper.cs

@@ -6,6 +6,7 @@
 using System.Net;
 using System.Text;
 using System.Text.Json;
+using System.Xml;
 using Azure.DataApiBuilder.Config.ObjectModel;
 using Azure.DataApiBuilder.Core.Configurations;
 using Azure.DataApiBuilder.Core.Models;
@@ -18,7 +19,6 @@
 using Azure.DataApiBuilder.Service.GraphQLBuilder.GraphQLTypes;
 using Azure.DataApiBuilder.Service.GraphQLBuilder.Queries;
 using HotChocolate.Execution;
-using HotChocolate.Execution.Processing;
 using HotChocolate.Language;
 using HotChocolate.Resolvers;
 using NodaTime.Text;
@@ -201,7 +201,7 @@ fieldValue.ValueKind is not (JsonValueKind.Undefined or JsonValueKind.Null))
                     return namedType switch
                     {
                         StringType => fieldValue.GetString(), // spec
-                        ByteType => fieldValue.GetByte(),
+                        UnsignedByteType => fieldValue.GetByte(),
                         ShortType => fieldValue.GetInt16(),
                         IntType => fieldValue.GetInt32(), // spec
                         LongType => fieldValue.GetInt64(),
@@ -211,11 +211,21 @@ fieldValue.ValueKind is not (JsonValueKind.Undefined or JsonValueKind.Null))
                         DateTimeType => DateTimeOffset.TryParse(fieldValue.GetString()!, DateTimeFormatInfo.InvariantInfo, DateTimeStyles.AssumeUniversal, out DateTimeOffset date) ? date : null, // for DW when datetime is null it will be in "" (double quotes) due to stringagg parsing and hence we need to ensure parsing is correct.
                         DateType => DateTimeOffset.TryParse(fieldValue.GetString()!, out DateTimeOffset date) ? date : null,
                         HotChocolate.Types.NodaTime.LocalTimeType => fieldValue.GetString()!.Equals("null", StringComparison.OrdinalIgnoreCase) ? null : LocalTimePattern.ExtendedIso.Parse(fieldValue.GetString()!).Value,
-                        ByteArrayType => fieldValue.GetBytesFromBase64(),
+                        // HC v16 ships both ByteArrayType (legacy, GraphQL name "ByteArray", runtime byte[])
+                        // and Base64StringType (new, GraphQL name "Base64String", runtime byte[]). DAB's
+                        // generated schemas still use the GraphQL name "ByteArray", so HC binds entity
+                        // fields to ByteArrayType. We accept either type here so DAB also tolerates
+                        // schemas that bind to Base64StringType (e.g. via DefaultValueType).
+                        // CS0618: ByteArrayType is [Obsolete] in HC v16 in favor of Base64StringType,
+                        // but we still need to pattern-match it because it remains the type bound to
+                        // the GraphQL name "ByteArray" that DAB-generated schemas continue to use.
+#pragma warning disable CS0618
+                        Base64StringType or ByteArrayType => fieldValue.GetBytesFromBase64(),
+#pragma warning restore CS0618
                         BooleanType => fieldValue.GetBoolean(), // spec
                         UrlType => new Uri(fieldValue.GetString()!),
                         UuidType => fieldValue.GetGuid(),
-                        TimeSpanType => TimeSpan.Parse(fieldValue.GetString()!),
+                        DurationType => XmlConvert.ToTimeSpan(fieldValue.GetString()!),
                         AnyType => fieldValue.ToString(),
                         _ => fieldValue.GetString()
                     };
@@ -508,7 +518,7 @@ public static InputObjectType InputObjectTypeFromIInputField(IInputValueDefiniti
         {
             return GetParametersFromSchemaAndQueryFields(
                 context.Selection.Field,
-                context.Selection.SyntaxNode,
+                context.Selection.RequireFieldNode(),
                 context.Variables);
         }
 

src/Core/Services/GraphQLSchemaCreator.cs

@@ -105,6 +105,15 @@ private ISchemaBuilder Parse(
             // Generate the Query and the Mutation Node.
             (DocumentNode queryNode, DocumentNode mutationNode) = GenerateQueryAndMutationNodes(root, inputTypes);
 
+            // Hot Chocolate v16 validates schemas eagerly during host startup
+            // (RequestExecutorWarmupService) and rejects an empty Query type with
+            // "The object type `Query` has to at least define one field in order to be valid."
+            // This can occur in valid runtime configurations: GraphQL globally disabled,
+            // every entity opting out of GraphQL via `graphql.enabled = false`, or no entities
+            // configured. Inject a hidden placeholder field with a no-op resolver so the schema
+            // is structurally valid; HC v16 also rejects fields without resolvers.
+            queryNode = EnsureQueryHasAtLeastOneField(queryNode, sb);
+
             return sb
                 .AddDocument(root)
                 .AddAuthorizeDirectiveType()
@@ -122,12 +131,70 @@ private ISchemaBuilder Parse(
                 .AddDocument(queryNode)
                 // Generate the GraphQL mutations from the provided objects
                 .AddDocument(mutationNode)
-                // Enable the OneOf directive (https://github.com/graphql/graphql-spec/pull/825) to support the DefaultValue type
-                .ModifyOptions(o => o.EnableOneOf = true)
                 // Adds our type interceptor that will create the resolvers.
                 .TryAddTypeInterceptor(new ResolverTypeInterceptor(new ExecutionHelper(_queryEngineFactory, _mutationEngineFactory, _runtimeConfigProvider)));
         }
 
+        /// <summary>
+        /// Name of the hidden placeholder field added to <c>Query</c> when no entity contributes
+        /// a query field, used to keep the schema valid for HC v16's eager validation.
+        /// </summary>
+        private const string EMPTY_SCHEMA_PLACEHOLDER_FIELD_NAME = "_dab";
+
+        /// <summary>
+        /// If the generated <c>Query</c> object type has no fields, append a hidden placeholder
+        /// field and register a null-returning resolver for it. The placeholder is shadowed in
+        /// any configuration that produces real query fields, so it is only visible in
+        /// otherwise-empty schemas (GraphQL globally disabled, all entities opting out,
+        /// no entities configured).
+        /// </summary>
+        private static DocumentNode EnsureQueryHasAtLeastOneField(DocumentNode queryNode, ISchemaBuilder sb)
+        {
+            ImmutableArray<IDefinitionNode>.Builder rewritten = ImmutableArray.CreateBuilder<IDefinitionNode>(queryNode.Definitions.Count);
+            bool placeholderInjected = false;
+
+            foreach (IDefinitionNode definition in queryNode.Definitions)
+            {
+                if (definition is ObjectTypeDefinitionNode objectType
+                    && objectType.Name.Value == "Query"
+                    && objectType.Fields.Count == 0)
+                {
+                    FieldDefinitionNode placeholderField = new(
+                        location: null,
+                        new NameNode(EMPTY_SCHEMA_PLACEHOLDER_FIELD_NAME),
+                        new StringValueNode(
+                            "Internal placeholder; only present when no entity contributes a query field. "
+                            + "Always returns null and is never reachable in normal operation."),
+                        arguments: new List<InputValueDefinitionNode>(),
+                        type: new NamedTypeNode(new NameNode("String")),
+                        directives: new List<DirectiveNode>());
+
+                    rewritten.Add(new ObjectTypeDefinitionNode(
+                        objectType.Location,
+                        objectType.Name,
+                        objectType.Description,
+                        objectType.Directives,
+                        objectType.Interfaces,
+                        new List<FieldDefinitionNode> { placeholderField }));
+                    placeholderInjected = true;
+                }
+                else
+                {
+                    rewritten.Add(definition);
+                }
+            }
+
+            if (placeholderInjected)
+            {
+                // HC v16 requires every field to have a resolver; bind a no-op that always
+                // returns null. The field is unreachable in normal operation because callers
+                // for empty-Query configurations never issue GraphQL requests.
+                sb.AddResolver("Query", EMPTY_SCHEMA_PLACEHOLDER_FIELD_NAME, _ => null);
+            }
+
+            return new DocumentNode(rewritten.ToImmutable());
+        }
+
         /// <summary>
         /// Generate the GraphQL schema query and mutation nodes from the provided database.
         /// </summary>

src/Directory.Packages.props

@@ -13,15 +13,12 @@
     <PackageVersion Include="CommandLineParser" Version="2.9.1" />
     <PackageVersion Include="coverlet.msbuild" Version="6.0.2" />
     <PackageVersion Include="coverlet.collector" Version="6.0.2" />
-    <PackageVersion Include="HotChocolate" Version="16.0.0-p.7.68" />
-    <PackageVersion Include="HotChocolate.AspNetCore" Version="16.0.0-p.7.68" />
-    <PackageVersion Include="HotChocolate.AspNetCore.Authorization" Version="16.0.0-p.7.68" />
-    <PackageVersion Include="HotChocolate.ModelContextProtocol" Version="16.0.0-p.7.68" />
-    <PackageVersion Include="HotChocolate.Types.NodaTime" Version="16.0.0-p.7.68" />
-    <PackageVersion Include="HotChocolate.Utilities.Introspection" Version="16.0.0-p.7.68" />
-    <PackageVersion Include="HotChocolate.Transport.Http" Version="16.0.0-p.7.68" />
-    <PackageVersion Include="HotChocolate.Diagnostics" Version="16.0.0-p.7.68" />
-    <PackageVersion Include="CookieCrumble" Version="16.0.0-p.7.68" />
+    <PackageVersion Include="HotChocolate" Version="16.0.0-rc.1.43" />
+    <PackageVersion Include="HotChocolate.AspNetCore" Version="16.0.0-rc.1.43" />
+    <PackageVersion Include="HotChocolate.AspNetCore.Authorization" Version="16.0.0-rc.1.43" />
+    <PackageVersion Include="HotChocolate.Types.NodaTime" Version="16.0.0-rc.1.43" />
+    <PackageVersion Include="HotChocolate.Utilities.Introspection" Version="16.0.0-rc.1.43" />
+    <PackageVersion Include="HotChocolate.Diagnostics" Version="16.0.0-rc.1.43" />
     <PackageVersion Include="Humanizer" Version="2.14.1" />
     <PackageVersion Include="Humanizer.Core" Version="2.14.1" />
     <PackageVersion Include="DotNetEnv" Version="3.0.0" />

src/Service.GraphQLBuilder/CustomScalars/SingleType.cs

@@ -1,7 +1,9 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
+using System.Text.Json;
 using HotChocolate.Language;
+using HotChocolate.Text.Json;
 using HotChocolate.Types;
 
 namespace Azure.DataApiBuilder.Service.GraphQLBuilder.CustomScalars
@@ -48,10 +50,16 @@ public SingleType(
             Description = description;
         }
 
-        protected override float ParseLiteral(IFloatValueLiteral valueSyntax) =>
-            valueSyntax.ToSingle();
+        protected override float OnCoerceInputLiteral(IFloatValueLiteral valueLiteral)
+            => valueLiteral.ToSingle();
 
-        protected override FloatValueNode ParseValue(float runtimeValue) =>
-            new(runtimeValue);
+        protected override float OnCoerceInputValue(JsonElement inputValue)
+            => inputValue.GetSingle();
+
+        protected override void OnCoerceOutputValue(float runtimeValue, ResultElement resultValue)
+            => resultValue.SetNumberValue(runtimeValue);
+
+        protected override IValueNode OnValueToLiteral(float runtimeValue)
+            => new FloatValueNode(runtimeValue);
     }
 }