直升机,
我试图创建一个将存储在数据库中的两个“int”映射到日期时间的 UserType。我的“int”在数据库中调用了时间和日期,这样我就想得到想要的效果。但我收到错误:指定的演员表无效。
我的代码:
public class DateTimeUserType : ImmutableUserType
{
public override object NullSafeGet(IDataReader rs, string[] names, object owner)
{
var date = (int)NHibernateUtil.Int32.NullSafeGet(rs, names[0]);
var time = (int)NHibernateUtil.Int32.NullSafeGet(rs, names[1]);
return Converts.ConvertDateTimeFromInt(date, time);
}
public override void NullSafeSet(IDbCommand cmd, object value, int index)
{
var res = Converts.ConvertDateTimeToInt((DateTime)value);
NHibernateUtil.Int32.NullSafeSet(cmd, res.Date.GetValueOrDefault(), index);
NHibernateUtil.Int32.NullSafeSet(cmd, res.Time.GetValueOrDefault(), index + 1);
}
public override Type ReturnedType
{
get { return typeof(DateTime); }
}
public override SqlType[] SqlTypes
{
get { return new[] { SqlTypeFactory.Int32, SqlTypeFactory.Int32 }; }
}
}
public abstract class ImmutableUserType : IUserType
{
public new virtual bool Equals(object x, object y)
{
return object.Equals(x, y);
}
public virtual int GetHashCode(object x)
{
return (x == null) ? 0 : x.GetHashCode();
}
public bool IsMutable
{
get { return false; }
}
public object DeepCopy(object value)
{
return value;
}
public object Replace(object original, object target, object owner)
{
return original;
}
public object Assemble(object cached, object owner)
{
return cached;
}
public object Disassemble(object value)
{
return value;
}
public abstract object NullSafeGet(System.Data.IDataReader rs, string[] names, object owner);
public abstract void NullSafeSet(System.Data.IDbCommand cmd, object value, int index);
public abstract Type ReturnedType { get; }
public abstract SqlType[] SqlTypes { get; }
}