修复问题

src/0-core/HuanMeng.DotNetCore/MultiTenant/MultiTenantDbContext.cs

@@ -76,5 +76,26 @@ namespace HuanMeng.DotNetCore.MultiTenant
             return base.SaveChanges();
         }
  
+        public override Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
+        {
+            if (TenantInfo?.TenantId != null)
+            {
+                var entries = ChangeTracker.Entries()
+                .Where(e => e.Entity is IMultiTenantEntity &&
+                            (e.State == EntityState.Added || e.State == EntityState.Modified))
+                .Select(e => e.Entity as IMultiTenantEntity)
+                .ToList();
+
+                foreach (var entity in entries)
+                {
+                    if (entity?.TenantId == null || entity?.TenantId == Guid.Empty)
+                    {
+                        entity.TenantId = TenantInfo.TenantId;
+                    }
+                }
+            }
+            return base.SaveChangesAsync(cancellationToken);
+        }
+
     }
 }