如何使用 Audit.Net entityframework 实现自定义字段

Question

我是 Audit.net 的新手。我在我的项目中成功配置了它。

但是现在，我需要扩展它以保存额外的信息，例如 requesterID 和视图页面上的评论。

我的情况： 实体映射到 Entity_AT

Entity {
    [Key]
    int     ID
    string  label
}

Entity_AT {
    [Key]
    int      ATID
    int      ID
    string   label
    int      ATFlag
    datetime ATCreationDate
    string   RequesterID
    string   ATComment
}

public void Add(TEntity obj, string RequesterId)
{
   _dbSet.Add(obj);
   _context.SaveChanges();
}

[AuditDbContext(Mode = AuditOptionMode.OptOut, IncludeEntityObjects = false, AuditEventType = "{database}_{context}")]
public class MyDBContext : AuditIdentityDbContext<ApplicationUser>
{
}

Audit.Core.Configuration.DataProvider = new EntityFrameworkDataProvider()
{
    AuditTypeMapper = t => t == typeof(Entity) ? typeof(Entity_AT) : null,
    AuditEntityAction = (evt, entry, auditEntity) =>
    {
        var a = (dynamic)auditEntity;
        a.ATCreationDate = DateTime.UtcNow;
        a.ATFlag = (entry.Action == "Insert") ? 1 : (entry.Action == "Update") ? 2 : (entry.Action == "Delete") ? 3 : 0;

        return true; // return false to ignore the audit
    }
};

我试过了：

_context.AddAuditCustomField("RequesterId", requesterId);
_context.AddAuditCustomField("ATComment", "pippo");

_dbSet.Add(obj);
_context.SaveChanges();

但没有结果

Answer 1

您已将"RequesterId" 自定义字段添加到AuditEvent，但您并未将其映射到AuditEntity 属性。

您应该对实体操作执行以下操作：

Audit.Core.Configuration.DataProvider = new EntityFrameworkDataProvider()
{
    AuditTypeMapper = t => t == typeof(Entity) ? typeof(Entity_AT) : null,
    AuditEntityAction = (evt, entry, auditEntity) =>
    {
        var a = (dynamic)auditEntity;
        a.ATCreationDate = ...;
        a.ATFlag = ...;

        a.RequesterID = evt.CustomFields["RequesterId"] as string;
        a.ATComment = evt.CustomFields["ATComment"] as string;

        return true; 
    }
};

请注意，您也可以使用 Fluent API 以更简洁的语法配置数据提供者：

Audit.Core.Configuration.Setup()
    .UseEntityFramework(_ => _
        .AuditTypeExplicitMapper(map => map
            .Map<Entity, Entity_AT>((evt, entry, auditEntity) =>
            {
                auditEntity.ATCreationDate = ...;
                auditEntity.ATFlag = ...;
                auditEntity.RequesterID = evt.CustomFields["RequesterId"] as string;
                auditEntity.ATComment = evt.CustomFields["ATComment"] as string;
            })));