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。

项目可以有许多供应商与之关联，供应商可以为每个项目收到许多付款。

关于如何实现这一目标的任何想法？

Answer 1

我通过不引用我的查找表来解决这个问题，而只是让外键列直接引用实体。

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; }
}

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");
    }
}

这不是我问题的确切答案，而只是解决问题的方法。仍然在寻找如何做到问题所在。

Fluent NHibernate - 如何映射到引用查找表的表

1 个答案: