c# - Fluent NHibernate 和 HasMany 映射

Question

我在使用流利的 nhibernate 和 HasMany 时遇到以下问题。我已经通过谷歌和 SO 搜索类似的问题，但我发现的任何解决方案都不能解决我的问题。

我映射了以下实体（为清楚起见，我省略了大多数属性）：

PaymentSchedule.cs

public class PaymentSchedule
{
    public virtual BinaryId Id { get; set; }

    public virtual IList<PaymentToSchedule> Payments { get; set; }
}

PaymentToSchedule.cs

  public class PaymentToSchedule
  {
    public virtual BinaryId Id { get; set; }        

    public virtual PaymentSchedule PaymentSchedule { get; set; }
}

映射文件

PaymentScheduleMap.cs

public class PaymentScheduleMap : ClassMap<PaymentSchedule>
{
    public PaymentScheduleMap()
    {
        Table("A_Payment_Schedule");
        Id(x => x.Id, "A_Payment_Schedule_Id").CrmId();
        HasMany<PaymentToSchedule>(x => x.Payments).Table("A_Payment_To_Schedule").KeyColumns.Add("A_Payment_Schedule_Id").Fetch.Select();
    }
}

PaymentToScheduleMap.cs

public class PaymentToScheduleMap : ClassMap<PaymentToSchedule>
{
    public PaymentToScheduleMap()
    {
        Table("A_Payment_To_Schedule");
        Id(x => x.Id, "A_Payment_To_Schedule_Id").CrmId();            
        References(x => x.PaymentSchedule, "A_Payment_Schedule_Id");            
    }
}

基本上我想在加载 PaymentSchedule 对象时获取 PaymentToSchedule 实体列表。现在，要做到这一点，我必须使用这样的查询：

var paymentSchedules = dataAccess.Session.QueryOver<PaymentSchedule>().List(); 

并针对每个付款时间表

 var paymentToSchedule = (from pts in dataAccess.Session.Query<PaymentToSchedule>()
                                                where pts.PaymentSchedule.Id == ps.Id).
                                                      ToList<PaymentToSchedule>();

这很好用，但是有没有办法在查询 PaymentSchedule 时获取 PaymentToSchedule 实体列表？

Answer 1

var paymentSchedules = dataAccess.Session.QueryOver<PaymentSchedule>()
    .Fetch(x => x.Payments).Eager;
    .List();

// payments are already initialised, you can safly do
var allPayments = paymentSchedules.SelectMany(ps => ps.Payments).ToList();