c# - Audit.NET 连接对象保存问题

Question

我正在使用 Audit.NET 和 EntityFramework 扩展，当我仅跟踪 1 个实体时，一切都运行良好。

现在我正在跟踪连接到第一个实体的另一个实体，当我尝试保存它时，审核保存函数会抛出反射错误

System.Reflection.TargetException: 'Object does not match target type.'

我的类(class)结构如下:

public class FirstClass{
  public int ID{get;set;}
  //Some props here
  public SecondClass SecondClass{get;set}
}

public class SecondClass{
  public int ID{get;set;}
  public int FirstClassId{get;set;}
  public MySpecialClass JustForData{get;set;}
  //Some other props here
}

然后我只是将我的审计类建模为完全相同，但添加了审计字段

public class AuditClass{
  public Guid AuditId{get;set;}
  public string AuditMessage{get;set;}
}

public class FirstClassAudit : AuditClass{
  public int ID{get;set;}
  //Some props here
  //No SecondClass prop here
}

public class SecondClassAudit: AuditClass{
  public int ID{get;set;}
  public int FirstClassId{get;set;}
  public MySpecialClass JustForData{get;set;}
  //Some other props here
}

然后在 FirstClassAudit 中省略对 SecondClass 的引用

我的两个类都在 DbContext 中，每个审计类都映射到一个单独的表。我在 AuditTypeExplicitMapper 下添加了这两个类的映射，我对其进行了调试，没有出现问题。但我仍然在 SaveChanges 函数上遇到错误

当我保存时将 SecondClass 引用保留为空时，这似乎不会发生

编辑:更多信息

Audit.NET 配置:

Audit.Core.Configuration.Setup()
                .UseEntityFramework(
                ef => ef
                    .AuditTypeExplicitMapper(m => m
                    .Map<FirstClass, FirstClassAudit>((frst, auditFrst) =>
                    {
                        //Map the tag fields in here
                        auditFrst.Tag = frst.Installation.Tag;
                        //Some more props here
                    })
                    .Map<SecondClass, SecondClassAudit>()
                    .AuditEntityAction((ev, ent, auditEntity) =>
                    {
                        ((AuditClass)auditEntity).AuditMessage = ent.Action;
                    }))
                );

DbContext 中的保存函数:

public override int SaveChanges()
        {
            return Helper.SaveChanges(auditContext, () => base.SaveChanges());
        }

编辑2:堆栈跟踪

at System.Reflection.RuntimeMethodInfo.CheckConsistency(Object target) at System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index) at Audit.EntityFramework.Providers.EntityFrameworkDataProvider.CreateAuditEntity(Type definingType, Type auditType, EventEntry entry) at Audit.EntityFramework.Providers.EntityFrameworkDataProvider.InsertEvent(AuditEvent auditEvent) at Audit.Core.AuditScope.SaveEvent(Boolean forceInsert) at Audit.Core.AuditScope.Save() at Audit.EntityFramework.DbContextHelper.SaveScope(IAuditDbContext context, AuditScope scope, EntityFrameworkEvent event) at Audit.EntityFramework.DbContextHelper.SaveChanges(IAuditDbContext context, Func`1 baseSaveChanges) at MyDbContext.SaveChanges() in [MyLocalPath]\MyDbContext.cs:line 132 at FirstClassRepository.UpdateFirstClass(Int32 id, FirstClassDto first) in [MyLocalPath]\FirstClassRepository.cs:line 209 at FirstClassManager.UpdateFirstClass(Int32 id, FirstClassDto dto) in [MyLocalPath]\FirstClassManager.cs:line 244 at FirstClassController.<>c__DisplayClass20_0.b__0() in [MyLocalPath]\FirstClassController.cs:line 249

编辑:经过一番摆弄后，我通过将“MySpecialClass”添加到映射来说明它是什么类型，出现错误

System.ArgumentException: 'Object of type 'MySpecialClass' cannot be converted to type 'AuditMySpecialClass'.'

这个类是 Owned Type在我的数据上下文中，这可能与它有关，也许没有。

现在，错误似乎在到达您可以在映射中添加的用户定义操作之前抛出，可能 Audit.NET 正在尝试在用户定义操作之前映射这些内容？

Answer 1

使用最新版本Audit.EntityFramework (15.0.2)，您现在可以仅忽略某些审核类型的属性匹配，如下所示:

Audit.Core.Configuration.Setup()
    .UseEntityFramework(ef => ef
        .AuditTypeExplicitMapper(m => m
          .Map<FirstClass, FirstClassAudit>((frst, auditFrst) =>
          {
            auditFrst.Tag = frst.Installation.Tag;
          })
          .Map<SecondClass, SecondClassAudit>()
          .AuditEntityAction((ev, ent, auditEntity) =>
          {
            ((AuditClass)auditEntity).AuditMessage = ent.Action;
          }))
        .IgnoreMatchedProperties(t => t == typeof(FirstClassAudit)) // <-- Ignore prop. matching for FirstClassAudit
    );