Audit.NET 连接对象保存问题

Question

我正在使用带有 EntityFramework 扩展名的 Audit.NET，当我只跟踪 1 个实体时一切运行都很好。

现在我也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，审计保存功能抛出反射错误

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

我的 classes 的结构是这样的：

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建模 classes 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 中省略了对 SecondClass 的引用

我的两个 classes 都在 DbContext 中，审计 classes 分别映射到一个单独的 table。我在 AuditTypeExplicitMapper 下添加了两个 classes 的映射，我调试了它没有问题。但是我仍然在 SaveChanges 函数

上遇到错误

当我在保存时将 SecondClass 引用保留为 null 时，这似乎没有发生

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：经过更多的摆弄之后，我得到了错误，通过将 'MySpecialClass' 添加到映射

来说明它是什么类型

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

这个 class 是我的数据上下文中的一个 Owned Type，这可能与它有关，也许不是。

现在，错误似乎在它到达您可以在映射中添加的用户定义的操作之前抛出，可能 Audit.NET 正在尝试在用户定义的操作之前映射这些东西？

Answer 1

所以，我找到了解决办法。这不是我想要的 100%，但它有效。

问题出在我的 "MySpecialClass" 对象上，因为它们是 EFCore 拥有的类型，它们生成了自己的独立事件，这混淆了 Audit.NET

所以我在 "MySpecialClass" 声明上方添加了 [AuditIgnore]，并在配置中添加了 IgnoreMatchedProperties

[AuditIgnore]
public class MySpecialClass
{
  public Unit? UnitOfMeasure { get; set; }

  public float? Value { get; set; }
}

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

我还添加了自己的映射函数 "MapMatchedProperties" 以正确映射每个字段，但 "MySpecialClass"

的特殊例外

private static void MapMatchedProperties(object source, object destination)
        {
            var sourceType = source.GetType();
            var destinationType = destination.GetType();

            var sourceFields = sourceType.GetProperties();
            var destinationFields = destinationType.GetProperties();

            foreach (var field in sourceFields)
            {
                var destinationField = destinationFields.FirstOrDefault(f => f.Name.Equals(field.Name));

                if (destinationField != null && (destinationField.PropertyType == field.PropertyType))
                {
                    //Normal field
                    var sourceValue = field.GetValue(source);

                    destinationField.SetValue(destination, sourceValue);
                } else if(destinationField != null && (destinationField.PropertyType == typeof(AuditMySpecialClass) && field.PropertyType== typeof(MySpecialClass)))
                {
                    //MySpecialClass field
                    var destinationMeasure = new AuditMySpecialClass();

                    var sourceValue = (MySpecialClass)field.GetValue(source);

                    if (sourceValue != null || sourceValue.IsEmpty())
                    {
                        destinationMeasure.UnitOfMeasure = sourceValue.UnitOfMeasure;
                        destinationMeasure.Value = sourceValue.Value;
                    }

                    destinationField.SetValue(destination, destinationMeasure);
                }
            }
        }

Answer 2

使用最新版本Audit.EntityFramework（15.0.2），您现在可以忽略属性仅针对某些审计类型的匹配，如下：

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
    );

Audit.NET 连接对象保存问题

Audit.NET connected object save issue

c#

audit.net