Restore DeleteOrphansTiming value of ChangeTracker.

framework/src/Volo.Abp.EntityFrameworkCore/Volo/Abp/EntityFrameworkCore/AbpDbContext.cs

@@ -155,7 +155,6 @@ namespace Volo.Abp.EntityFrameworkCore
             }
 
             ChangeTracker.CascadeDeleteTiming = CascadeTiming.OnSaveChanges;
-            ChangeTracker.DeleteOrphansTiming = CascadeTiming.OnSaveChanges;
 
             ChangeTracker.Tracked += ChangeTracker_Tracked;
         }

framework/test/Volo.Abp.EntityFrameworkCore.Tests/Volo/Abp/EntityFrameworkCore/AbpEntityFrameworkCoreTestModule.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using Microsoft.Data.Sqlite;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
@@ -38,6 +38,11 @@ namespace Volo.Abp.EntityFrameworkCore
                 {
                     opt.DefaultWithDetailsFunc = q => q.Include(p => p.Phones);
                 });
+                
+                options.Entity<Author>(opt =>
+                {
+                    opt.DefaultWithDetailsFunc = q => q.Include(p => p.Books);
+                });
             });
 
             var sqliteConnection = CreateDatabaseAndGetConnection();

framework/test/Volo.Abp.EntityFrameworkCore.Tests/Volo/Abp/EntityFrameworkCore/DataFiltering/SoftDelete_Tests.cs

@@ -1,9 +1,49 @@
-using Volo.Abp.TestApp.Testing;
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using Shouldly;
+using Volo.Abp.Domain.Repositories;
+using Volo.Abp.TestApp;
+using Volo.Abp.TestApp.Domain;
+using Volo.Abp.TestApp.Testing;
+using Volo.Abp.Uow;
+using Xunit;
 
 namespace Volo.Abp.EntityFrameworkCore.DataFiltering
 {
+    /// <summary>
+    /// This is just to test the cascade delete behavior of EF Core's navigation properties.
+    /// Soft delete is usually only used in the aggregate root entity instead <see cref="Book" />.
+    /// </summary>
     public class SoftDelete_Tests : SoftDelete_Tests<AbpEntityFrameworkCoreTestModule>
     {
-
+        [Fact]
+        public async Task Navigation_Properties_Cascade_Delete_Test()
+        {
+            var authorRepository = GetRequiredService<IRepository<Author, Guid>>();
+            var authorId = Guid.NewGuid();
+            
+            var author = new Author(authorId, "tom");
+            author.Books.Add(new Book(authorId,  Guid.NewGuid(), "asp net core"));
+            author.Books.Add(new Book(authorId, Guid.NewGuid(),"c#"));
+            await authorRepository.InsertAsync(author);
+            
+            await WithUnitOfWorkAsync(async () =>
+            {
+                var author = await authorRepository.GetAsync(authorId);
+                author.Books.ShouldNotBeEmpty();
+                author.Books.Count.ShouldBe(2);
+                
+                author.Books.Clear();
+                await authorRepository.UpdateAsync(author);
+            });
+            
+            using (DataFilter.Disable<ISoftDelete>())
+            {
+                author = await authorRepository.GetAsync(authorId);
+                author.Books.ShouldNotBeEmpty();
+                author.Books.ShouldAllBe(x => x.IsDeleted);
+            }
+        }
     }
 }

framework/test/Volo.Abp.EntityFrameworkCore.Tests/Volo/Abp/EntityFrameworkCore/TestMigrationsDbContext.cs

@@ -1,4 +1,4 @@
-using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore;
 using Volo.Abp.EntityFrameworkCore.TestApp.SecondContext;
 using Volo.Abp.EntityFrameworkCore.TestApp.ThirdDbContext;
 using Volo.Abp.TestApp.Domain;
@@ -16,7 +16,9 @@ namespace Volo.Abp.EntityFrameworkCore
         public DbSet<BookInSecondDbContext> Books { get; set; }
 
         public DbSet<EntityWithIntPk> EntityWithIntPks { get; set; }
-
+        
+        public DbSet<Author> Author { get; set; }
+        
         public TestMigrationsDbContext(DbContextOptions<TestMigrationsDbContext> options) 
             : base(options)
         {

framework/test/Volo.Abp.EntityFrameworkCore.Tests/Volo/Abp/TestApp/Domain/Author.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using Volo.Abp.Domain.Entities;
+
+namespace Volo.Abp.TestApp.Domain
+{
+    public class Author : AggregateRoot<Guid>
+    {
+        public string Name { get; set; }
+        
+        public ICollection<Book> Books { get; set; }
+
+        private Author()
+        {
+
+        }
+        
+        public Author(Guid id, string name)
+            : base(id)
+        {
+            Name = name;
+            Books = new List<Book>();
+        }
+    }
+}

framework/test/Volo.Abp.EntityFrameworkCore.Tests/Volo/Abp/TestApp/Domain/Book.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using Volo.Abp.Domain.Entities;
+
+namespace Volo.Abp.TestApp.Domain
+{
+    public class Book : Entity<Guid>, ISoftDelete
+    {
+        public Guid AuthorId { get; set; }
+        
+        public string Title { get; set; }
+
+        private Book()
+        {
+
+        }
+        
+        public Book(Guid authorId, Guid id, string title)
+        {
+            Id = id;
+            AuthorId = authorId;
+            Title = title;
+        }
+
+        public bool IsDeleted { get; set; }
+    }
+}

framework/test/Volo.Abp.EntityFrameworkCore.Tests/Volo/Abp/TestApp/EntityFrameworkCore/TestAppDbContext.cs

@@ -17,6 +17,8 @@ namespace Volo.Abp.TestApp.EntityFrameworkCore
 
         public DbSet<EntityWithIntPk> EntityWithIntPks { get; set; }
         
+        public DbSet<Author> Author { get; set; }
+
         public TestAppDbContext(DbContextOptions<TestAppDbContext> options) 
             : base(options)
         {