Flow query tracking behavior to materialization interceptor (#29928)

Author: ajcvickers

src/EFCore/Diagnostics/MaterializationInterceptionData.cs

@@ -28,11 +28,13 @@ public readonly struct MaterializationInterceptionData
     public MaterializationInterceptionData(
         MaterializationContext materializationContext,
         IEntityType entityType,
+        QueryTrackingBehavior? queryTrackingBehavior,
         Dictionary<IPropertyBase, (object TypedAccessor, Func<MaterializationContext, object?> Accessor)> valueAccessor)
     {
         _materializationContext = materializationContext;
         _valueAccessor = valueAccessor;
         EntityType = entityType;
+        QueryTrackingBehavior = queryTrackingBehavior;
     }
 
     /// <summary>
@@ -46,6 +48,11 @@ public DbContext Context
     /// </summary>
     public IEntityType EntityType { get; }
 
+    /// <summary>
+    ///     The query tracking behavior, or <see langword="null" /> if this materialization is not from a query.
+    /// </summary>
+    public QueryTrackingBehavior? QueryTrackingBehavior { get; }
+
     /// <summary>
     ///     Gets the property value for the property with the given name.
     /// </summary>

src/EFCore/Query/Internal/EntityMaterializerSource.cs

@@ -165,6 +165,7 @@ private static readonly ConstructorInfo MaterializationInterceptionDataConstruct
             {
                 typeof(MaterializationContext),
                 typeof(IEntityType),
+                typeof(QueryTrackingBehavior?),
                 typeof(Dictionary<IPropertyBase, (object, Func<MaterializationContext, object?>)>)
             })!;
 
@@ -242,6 +243,7 @@ private static Expression CreateInterceptionMaterializeExpression(
                     MaterializationInterceptionDataConstructor,
                     materializationContextExpression,
                     Expression.Constant(entityType),
+                    Expression.Constant(bindingInfo.QueryTrackingBehavior, typeof(QueryTrackingBehavior?)),
                     accessorDictionaryVariable)),
             Expression.Assign(
                 creatingResultVariable,

test/EFCore.Specification.Tests/MaterializationInterceptionTestBase.cs

@@ -83,6 +83,7 @@ public virtual void Intercept_query_materialization_for_empty_constructor(bool i
                 {
                     Assert.Same(context, data.Context);
                     Assert.Same(data.Context.Model.FindEntityType(typeof(Book)), data.EntityType);
+                    Assert.Equal(QueryTrackingBehavior.TrackAll, data.QueryTrackingBehavior);
 
                     var idProperty = data.EntityType.FindProperty(nameof(Book.Id))!;
                     var id = data.GetPropertyValue<Guid>(nameof(Book.Id))!;
@@ -189,6 +190,7 @@ public virtual void Intercept_query_materialization_for_full_constructor(bool in
                 {
                     Assert.Same(context, data.Context);
                     Assert.Same(data.Context.Model.FindEntityType(typeof(Pamphlet)), data.EntityType);
+                    Assert.Equal(QueryTrackingBehavior.TrackAll, data.QueryTrackingBehavior);
 
                     var idProperty = data.EntityType.FindProperty(nameof(Pamphlet.Id))!;
                     var id = data.GetPropertyValue<Guid>(nameof(Pamphlet.Id))!;