c# - Fluent NHibernate - 如何映射到引用查找表的表

Question

我在下面定义了 4 个表：

Projects:
    Project_Id
    Project_Name

Vendors:
    Vendor_Id
    Vendor_Name

Project_Vendors:
    Project_Vendor_Id
    Project_Id
    Vendor_Id

Project_Vendor_Payments:
    Payment_Id
    Project_Vendor_Id
    Payment_Amount

我什至不确定从哪里开始定义我的类以使用 Fluent NHibernate，更不用说定义我的映射了。

一个项目可以有许多与之关联的供应商，并且一个供应商可以在每个项目中收到许多付款。

关于如何实现这一点的任何想法？

Answer 1

我通过不引用我的查找表而只使用直接引用实体的外键列解决了这个问题。

这是我的表结构：

Projects:
    Project_Id
    Project_Name

Vendors:
    Vendor_Id
    Vendor_Name

Project_Vendors:
    Project_Vendor_Id
    Project_Id
    Vendor_Id

Project_Vendor_Payments:
    Payment_Id
    Project_Id
    Vendor_Id
    Payment_Amount

我的课程定义为：

public class Project
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
    public virtual IList<Vendor> Vendors { get; set; }
    public virtual IList<VendorPayment> VendorPayments { get; set; }
}

public class Vendor
{
    public virtual int Id { get; set; }
    public virtual string Name { get; set; }
}

public class VendorPayment
{
    public virtual int Id { get; set; }
    public virtual Vendor Vendor { get; set; }
    public virtual float Amount { get; set; }
}

还有我的映射：

public ProjectMappings : ClassMap<Project>
{
    public ProjectMappings()
    {
        Table("Projects");
        Id(x => x.Id).Column("Project_Id");
        HasManyToMany(x => x.Vendors).Table("Project_Vendors")
            .ParentKeyColumn("Project_Id")
            .ChildKeyColumn("Vendor_Id")
            .Cascade.AllDeleteOrphan();
        HasMany(x => x.VendorPayments).Table("Project_Vendor_Payments")
            .KeyColumn("Project_Id")
            .Cascade.AllDeleteOrphan();
        Map(x => x.Name).Column("Project_Name")
    }
}

public class VendorMappings : ClassMap<Vendor>
{
    public VendorMappings()
    {
        Table("Vendors");
        Id(x => x.Id).Column("Vendor_Id");
        Map(x => x.Name).Column("Vendor_Name");
    }
}

public class VendorPaymentMappings : ClassMap<VendorPayment>
{
    public VendorPaymentMappings()
    {
        Table("Project_Vendor_Payments");
        Id(x => x.Id).Column("Payment_Id");
        References(x => x.Vendor).Column("Vendor_Id");
        Map(x => x.Amount).Column("Payment_Amount");
    }
}

这不是对我的问题的确切答案，而只是解决问题的方法。仍在寻找如何准确地解决问题。