NHibernate：通用方法中的QueryOver

Question

我有这个测试方法，“列表”方法有问题。我想使用几个类（都包含 IAdminDecimal）。在 QueryOver 上，我有这个错误： 类型“T”必须是引用类型才能在泛型类型或方法“NHibernate.ISession.QueryOver()”中用作参数“T”

using (var session = sessions.OpenSession())
{
    using (var tx = session.BeginTransaction())
    {
        CurrentSessionContext.Bind(session);

        AdministrationService service = new AdministrationService(session);
        service.List<AdminDelay>();

        tx.Commit();
    }
}

班级：

public class AdministrationService
{
    private readonly ISession _session;

    public AdministrationService(ISession session)
    {
        _session = session;
    }

    public IList<T> List<T>() where T : IAdminDecimal
    {
        var res = _session.QueryOver<T>().List<T>();
        return res;
    }
}


public interface IAdminDecimal
{
    int Id { get; set; }
    int Code { get; set; }
    decimal Value { get; set; }
    bool IsDeleted { get; set; }
}

public class AdminVAT : IAdminDecimal
{
    public virtual int Id { get; set; }
    public virtual int Code { get; set; }
    public virtual decimal Value { get; set; }
    public virtual bool IsDeleted { get; set; }
}

Answer 1

试试：

public IList<T> List<T>() where T : class, IAdminDecimal