Nhibernate与实体基类

我试图实现抽象的基本实体类，它覆盖了equals和GetHashcode…这是我的实体基类

public abstract class Entity<TId>
{

public virtual TId Id { get; protected set; }
protected virtual int Version { get; set; }

public override bool Equals(object obj)
{
  return Equals(obj as Entity<TId>);
}

private static bool IsTransient(Entity<TId> obj)
{
  return obj != null &&
         Equals(obj.Id, default(TId));
}

private Type GetUnproxiedType()
{
  return GetType();
}

public virtual bool Equals(Entity<TId> other)
{
  if (other == null)
    return false;

  if (ReferenceEquals(this, other))
    return true;

  if (!IsTransient(this) &&
      !IsTransient(other) &&
      Equals(Id, other.Id))
  {
    var otherType = other.GetUnproxiedType();
    var thisType = GetUnproxiedType();
    return thisType.IsAssignableFrom(otherType) ||
           otherType.IsAssignableFrom(thisType);
  }

  return false;
}

public override int GetHashCode()
{
  if (Equals(Id, default(TId)))
    return base.GetHashCode();
  return Id.GetHashCode();
}

---

我对如何设置基类的ID属性有点困惑。任何人都可以就此向我提出建议，我将非常感谢任何帮助。

您只需要将类型传递给继承的基类

请参见实体中的注释：

public class Product : Entity<Guid>
{
    // The ProductId property is no longer needed as the
    // Id property on the base class will be of type Guid
    // and can serve as the Id
    //public virtual Guid ProductId { get; set; }
    public virtual string Name { get; set; }
    public virtual string Description { get; set; }
    public virtual Decimal UnitPrice { get; set; }
}

public class Customer : Entity<int>
{
    // The CustomerID property is no longer needed as the
    // Id property on the base class will be of type int
    // and can serve as the Id
    // public virtual int CustomerID { get; set; }
    public virtual string FirstName { get; set; }
    public virtual string LastName { get; set; }
    public virtual int Age { get; set; }
}

公共类产品：实体
{
//ProductId属性不再需要作为
//基类上的Id属性将为Guid类型
//可以作为身份证
//公共虚拟Guid ProductId{get；set；}
公共虚拟字符串名称{get；set；}
公共虚拟字符串描述{get；set；}
公共虚拟十进制单价{get；set；}
}
公共类客户：实体
{
//CustomerID属性不再需要作为
//基类上的Id属性的类型将为int
//可以作为身份证
//公共虚拟int CustomerID{get；set；}
公共虚拟字符串FirstName{get；set；}
公共虚拟字符串LastName{get；set；}
公共虚拟整数{get；set；}
}

现在，在NHibernate映射文件中，只需指定Id属性的数据库列

public class Product : Entity<Guid>
{
    // The ProductId property is no longer needed as the
    // Id property on the base class will be of type Guid
    // and can serve as the Id
    //public virtual Guid ProductId { get; set; }
    public virtual string Name { get; set; }
    public virtual string Description { get; set; }
    public virtual Decimal UnitPrice { get; set; }
}

public class Customer : Entity<int>
{
    // The CustomerID property is no longer needed as the
    // Id property on the base class will be of type int
    // and can serve as the Id
    // public virtual int CustomerID { get; set; }
    public virtual string FirstName { get; set; }
    public virtual string LastName { get; set; }
    public virtual int Age { get; set; }
}