[release/8.0] Remove referencing indexes when reconfiguring a property as a navigation (#34651)

Fixes #29997

Author: AndriySvyryd

src/EFCore/Metadata/Internal/InternalTypeBaseBuilder.cs

@@ -18,6 +18,9 @@ public abstract class InternalTypeBaseBuilder : AnnotatableBuilder<TypeBase, Int
     private static readonly bool UseOldBehavior34201 =
         AppContext.TryGetSwitch("Microsoft.EntityFrameworkCore.Issue34201", out var enabled34201) && enabled34201;
 
+    internal static readonly bool UseOldBehavior29997 =
+        AppContext.TryGetSwitch("Microsoft.EntityFrameworkCore.Issue29997", out var enabled29997) && enabled29997;
+
     /// <summary>
     ///     This is an internal API that supports the Entity Framework Core infrastructure and not subject to
     ///     the same compatibility standards as public APIs. It may be changed or removed without notice in
@@ -754,7 +757,14 @@ public virtual void RemoveMembersInHierarchy(string propertyName, ConfigurationS
         {
             if (conflictingProperty.GetConfigurationSource() != ConfigurationSource.Explicit)
             {
-                conflictingProperty.DeclaringType.RemoveProperty(conflictingProperty);
+                if (UseOldBehavior29997)
+                {
+                    conflictingProperty.DeclaringType.RemoveProperty(conflictingProperty);
+                }
+                else
+                {
+                    conflictingProperty.DeclaringType.Builder.RemoveProperty(conflictingProperty, configurationSource);
+                }
             }
         }
 

test/EFCore.Cosmos.Tests/ModelBuilding/CosmosModelBuilderGenericTest.cs

@@ -1023,28 +1023,20 @@ public virtual void Reference_type_is_discovered_as_owned()
         {
             var modelBuilder = CreateModelBuilder();
 
-            modelBuilder.Entity<OneToOneOwnerWithField>(
-                e =>
-                {
-                    e.Property(p => p.Id);
-                    e.Property(p => p.AlternateKey);
-                    e.Property(p => p.Description);
-                    e.HasKey(p => p.Id);
-                });
+            modelBuilder.Entity<OwnerOfOwnees>();
 
             var model = modelBuilder.FinalizeModel();
 
-            var owner = model.FindEntityType(typeof(OneToOneOwnerWithField));
-            Assert.Equal(typeof(OneToOneOwnerWithField).FullName, owner.Name);
-            var ownership = owner.FindNavigation(nameof(OneToOneOwnerWithField.OwnedDependent)).ForeignKey;
+            var owner = model.FindEntityType(typeof(OwnerOfOwnees))!;
+            var ownership = owner.FindNavigation(nameof(OwnerOfOwnees.Ownee1))!.ForeignKey;
             Assert.True(ownership.IsOwnership);
-            Assert.Equal(nameof(OneToOneOwnerWithField.OwnedDependent), ownership.PrincipalToDependent.Name);
-            Assert.Equal(nameof(OneToOneOwnedWithField.OneToOneOwner), ownership.DependentToPrincipal.Name);
-            Assert.Equal(nameof(OneToOneOwnerWithField.Id), ownership.PrincipalKey.Properties.Single().Name);
+            Assert.Equal(nameof(OwnerOfOwnees.Ownee1), ownership.PrincipalToDependent!.Name);
+            Assert.Equal(nameof(Ownee1.Owner), ownership.DependentToPrincipal!.Name);
+            Assert.Equal(nameof(OwnerOfOwnees.Id), ownership.PrincipalKey.Properties.Single().Name);
             var owned = ownership.DeclaringEntityType;
             Assert.Single(owned.GetForeignKeys());
-            Assert.NotNull(model.FindEntityType(typeof(OneToOneOwnedWithField)));
-            Assert.Equal(1, model.GetEntityTypes().Count(e => e.ClrType == typeof(OneToOneOwnedWithField)));
+            Assert.NotNull(model.FindEntityType(typeof(Ownee1)));
+            Assert.Equal(1, model.GetEntityTypes().Count(e => e.ClrType == typeof(Ownee1)));
         }
 
         protected override TestModelBuilder CreateModelBuilder(Action<ModelConfigurationBuilder> configure = null)

test/EFCore.Tests/ModelBuilding/OwnedTypesTestBase.cs

@@ -559,6 +559,12 @@ public virtual void Can_call_Owner_fluent_api_after_calling_Entity()
             modelBuilder.Owned<Ownee1>();
             modelBuilder.Owned<Ownee2>();
             modelBuilder.Owned<Ownee3>();
+
+            var model = modelBuilder.FinalizeModel();
+
+            var owner = model.FindEntityType(typeof(OwnerOfOwnees))!;
+            var ownership = owner.FindNavigation(nameof(OwnerOfOwnees.Ownee1))!.ForeignKey;
+            Assert.True(ownership.IsOwnership);
         }
 
         [Flags]

test/EFCore.Tests/ModelBuilding/TestModel.cs

@@ -1144,16 +1144,23 @@ protected class OwnerOfOwnees
 
     protected class Ownee1
     {
+        public string Data { get; private set; } = "";
+
+        public OwnerOfOwnees Owner { get; private set; } = null!;
         public Ownee3? NewOwnee3 { get; private set; }
     }
 
     protected class Ownee2
     {
+        public Guid Data { get; private set; }
+
         public Ownee3? Ownee3 { get; private set; }
     }
 
     protected class Ownee3
     {
+        public DateTime Data { get; private set; }
+
         public string? Name { get; private set; }
     }
 
@@ -1221,6 +1228,7 @@ protected class OneToManyOwnedWithField
         public OneToManyOwnerWithField? OneToManyOwner { get; set; }
     }
 
+    [Index(nameof(OwnedDependent))]
     protected class OneToOneOwnerWithField
     {
         public int Id;