Set the database default value of LastActiveTime.

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

@@ -372,7 +372,7 @@ namespace Volo.Abp.EntityFrameworkCore
 
         protected virtual void ApplyAbpConceptsForModifiedEntity(EntityEntry entry, EntityChangeReport changeReport)
         {
-            if (entry.Properties.Any(x => x.IsModified && x.Metadata.ValueGenerated == ValueGenerated.Never))
+            if (entry.State == EntityState.Modified && entry.Properties.Any(x => x.IsModified && x.Metadata.ValueGenerated == ValueGenerated.Never))
             {
                 UpdateConcurrencyStamp(entry);
                 SetModificationAuditProperties(entry);

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

@@ -1,3 +1,4 @@
+using System;
 using Microsoft.EntityFrameworkCore;
 using Volo.Abp.EntityFrameworkCore.TestApp.SecondContext;
 using Volo.Abp.EntityFrameworkCore.TestApp.ThirdDbContext;
@@ -16,10 +17,10 @@ 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) 
+
+        public TestMigrationsDbContext(DbContextOptions<TestMigrationsDbContext> options)
             : base(options)
         {
 
@@ -36,6 +37,12 @@ namespace Volo.Abp.EntityFrameworkCore
                 b.HasKey(p => new { p.PersonId, p.Number });
             });
 
+
+            modelBuilder.Entity<Person>(b =>
+            {
+                b.Property(x => x.LastActiveTime).ValueGeneratedOnAddOrUpdate().HasDefaultValue(DateTime.Now);
+            });
+
             modelBuilder.Entity<City>(b =>
             {
                 b.OwnsMany(c => c.Districts, d =>

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

@@ -1,4 +1,5 @@
-using Microsoft.EntityFrameworkCore;
+using System;
+using Microsoft.EntityFrameworkCore;
 using Volo.Abp.EntityFrameworkCore;
 using Volo.Abp.EntityFrameworkCore.TestApp.ThirdDbContext;
 using Volo.Abp.TestApp.Domain;
@@ -16,10 +17,10 @@ namespace Volo.Abp.TestApp.EntityFrameworkCore
         public DbSet<ThirdDbContextDummyEntity> DummyEntities { get; set; }
 
         public DbSet<EntityWithIntPk> EntityWithIntPks { get; set; }
-        
+
         public DbSet<Author> Author { get; set; }
 
-        public TestAppDbContext(DbContextOptions<TestAppDbContext> options) 
+        public TestAppDbContext(DbContextOptions<TestAppDbContext> options)
             : base(options)
         {
 
@@ -38,7 +39,7 @@ namespace Volo.Abp.TestApp.EntityFrameworkCore
 
             modelBuilder.Entity<Person>(b =>
             {
-                b.Property(x => x.LastActiveTime).ValueGeneratedOnAddOrUpdate();
+                b.Property(x => x.LastActiveTime).ValueGeneratedOnAddOrUpdate().HasDefaultValue(DateTime.Now);
             });
 
             modelBuilder

framework/test/Volo.Abp.TestApp/Volo/Abp/TestApp/Domain/Person.cs

@@ -23,7 +23,7 @@ namespace Volo.Abp.TestApp.Domain
 
         public virtual Collection<Phone> Phones { get; set; }
 
-        public virtual DateTime? LastActiveTime { get; set; }
+        public virtual DateTime LastActiveTime { get; set; }
 
         private Person()
         {