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我的代码可以正常工作，但是我在表/ddl 中获得了 2 个额外的列，以表示多对多关系，~~但是~~ 具有关系上的属性（标量）。

我正在使用 1.2.0.712 (FluentNHibernate.dll) 3.1.0.4000 (NHibernate.dll)

实体：

public partial class Employee
{
    public Employee()
    {
        CommonConstructor();
    }
    private void CommonConstructor()
    {
        this.MyEmployeeToJobTitleMatchLinks = new List<EmployeeToJobTitleMatchLink>();
    }

    public virtual Guid? EmployeeUUID { get; set; }
    public virtual byte[] TheVersionProperty { get; set; }
    public virtual string SSN { get; set; }
    public virtual string LastName { get; set; }
    public virtual string FirstName { get; set; }
    public virtual DateTime CreateDate { get; set; }
    public virtual DateTime HireDate { get; set; }

    public virtual ICollection<EmployeeToJobTitleMatchLink> MyEmployeeToJobTitleMatchLinks { get; set; }
    public virtual void AddJobTitleLink(EmployeeToJobTitleMatchLink link)
    {
        link.TheEmployee = this;
        if (!this.MyEmployeeToJobTitleMatchLinks.Contains(link))
        {
            this.MyEmployeeToJobTitleMatchLinks.Add(link);
        }

        if (!link.TheJobTitle.MyJobTitleToEmployeeMatchLinks.Contains(link))
        {
            link.TheJobTitle.MyJobTitleToEmployeeMatchLinks.Add(link);
        }
    }

    public virtual void RemoveJobTitleLink(EmployeeToJobTitleMatchLink link)
    {
        link.TheEmployee = this;
        if (this.MyEmployeeToJobTitleMatchLinks.Contains(link))
        {
            this.MyEmployeeToJobTitleMatchLinks.Remove(link);
        }

        if (link.TheJobTitle.MyJobTitleToEmployeeMatchLinks.Contains(link))
        {
            link.TheJobTitle.MyJobTitleToEmployeeMatchLinks.Remove(link);
        }
    }
}

public partial class JobTitle
{

    public JobTitle()
    {
        CommonConstructor();
    }
    private void CommonConstructor()
    {
        this.MyJobTitleToEmployeeMatchLinks = new List<EmployeeToJobTitleMatchLink>();
    }

    public virtual Guid? JobTitleUUID { get; set; }
    public virtual byte[] TheVersionProperty { get; set; }
    public virtual string JobTitleName { get; set; }
    public virtual DateTime CreateDate { get; set; }
    public virtual ICollection<EmployeeToJobTitleMatchLink> MyJobTitleToEmployeeMatchLinks { get; set; }
    public virtual void AddEmployeeLink(EmployeeToJobTitleMatchLink link)
    {
        link.TheJobTitle = this;
        if (!this.MyJobTitleToEmployeeMatchLinks.Contains(link))
        {
            this.MyJobTitleToEmployeeMatchLinks.Add(link);
        }

        if (!link.TheEmployee.MyEmployeeToJobTitleMatchLinks.Contains(link))
        {
            link.TheEmployee.MyEmployeeToJobTitleMatchLinks.Add(link);
        }

    }

    public virtual void RemoveEmployeeLink(EmployeeToJobTitleMatchLink link)
    {
        link.TheJobTitle = this;
        if (this.MyJobTitleToEmployeeMatchLinks.Contains(link))
        {
            this.MyJobTitleToEmployeeMatchLinks.Remove(link);
        }

        if (link.TheEmployee.MyEmployeeToJobTitleMatchLinks.Contains(link))
        {
            link.TheEmployee.MyEmployeeToJobTitleMatchLinks.Remove(link);
        }

    }

}

public partial class EmployeeToJobTitleMatchLink
{
    public EmployeeToJobTitleMatchLink()
    {
        //this.Id = Guid.NewGuid(); /* this works in conjuction with <generator class="assigned"></generator>   */
    }

    public virtual Guid? LinkSurrogateUUID { get; set; }

    /*  These are "scalar properties of the ~~relationship~~  */
    public virtual int PriorityRank { get; set; }
    public virtual DateTime JobStartedOnDate { get; set; }

    public virtual Employee TheEmployee { get; set; }
    public virtual JobTitle TheJobTitle { get; set; }
}

映射：

public class EmployeeMap : ClassMap<Employee>
{
    public EmployeeMap()
    {
        Id(x => x.EmployeeUUID).GeneratedBy.GuidComb();

        OptimisticLock.Version();
        Version(x => x.TheVersionProperty)
            .Column("MyVersionColumn")
            .Not.Nullable()
            .CustomSqlType("timestamp")
            .Generated.Always();

        Map(x => x.SSN);
        Map(x => x.LastName);
        Map(x => x.FirstName);
        Map(x => x.CreateDate);
        Map(x => x.HireDate);

        HasMany(x => x.MyEmployeeToJobTitleMatchLinks)
            .Inverse()
            .Cascade.All();
    }
}

public class JobTitleMap : ClassMap<JobTitle>
{
    public JobTitleMap()
    {
        Id(x => x.JobTitleUUID).GeneratedBy.GuidComb();

        OptimisticLock.Version();
        Version(x => x.TheVersionProperty)
            .Column("MyVersionColumn")
            .Not.Nullable()
            .CustomSqlType("timestamp")
            .Generated.Always();

        Map(x => x.JobTitleName);
        Map(x => x.CreateDate);
        HasMany(x => x.MyJobTitleToEmployeeMatchLinks)
            .Inverse()
            .Cascade.All();
    }
}

public class EmployeeToJobTitleMatchLinkMap : ClassMap<EmployeeToJobTitleMatchLink>
{
    public EmployeeToJobTitleMatchLinkMap()
    {
        Id(x => x.LinkSurrogateUUID).GeneratedBy.GuidComb();
        Map(x => x.PriorityRank);
        Map(x => x.JobStartedOnDate);
        References(x => x.TheEmployee).Column("TheEmployeeUUID").Not.Nullable();/*Bad naming convention with "The", but left here so it can be seen easily in the DDL*/
        References(x => x.TheJobTitle).Column("TheJobTitleUUID").Not.Nullable();/*Bad naming convention with "The", but left here so it can be seen easily in the DDL*/
    }
}

这工作正常，但我在 ddl 中获得了 2 个额外的（可为空的）列。它们在下方标有星号 (*)。

Select * From [dbo].[EmployeeToJobTitleMatchLink] LinkSurrogateUUID
PriorityRank JobStartedOnDate
TheEmployeeUUID
TheJobTitleUUID

*Employee_id
*JobTitle_id

我理解这是“按照惯例”。（上面带有“_id”的名称）。但我不需要这些列。而且我需要能够自定义名称。（此模拟示例中的 TheEmployeeUUID 和 TheJobTitleUUID。）

我的最终目标是：

Select * From [dbo].[EmployeeToJobTitleMatchLink] LinkSurrogateUUID (UniqueIdentifier, SurrogateKey)
PriorityRank (scalar, int) JobStartedOnDate (scalar,datetime) TheEmployeeUUID (UniqueIdentifier, FK back to dbo.Employee.EmployeeUUID) TheJobTitleUUID (UniqueIdentifier, FK back to dbo. JobTitle.JobTitleUUID )

~relationship 上的属性非常重要。（此模型示例中的 PriorityRank 和 JobStartedOnDate。）

谢谢。我~那么近。

编辑：

有效的映射：

public class EmployeeMap : ClassMap<Employee>
{
    public EmployeeMap()
    {
        Id(x => x.EmployeeUUID).GeneratedBy.GuidComb();

        OptimisticLock.Version();
        Version(x => x.TheVersionProperty)
            .Column("MyVersionColumn")
            .Not.Nullable()
            .CustomSqlType("timestamp")
            .Generated.Always();

        Map(x => x.SSN);
        Map(x => x.LastName);
        Map(x => x.FirstName);
        Map(x => x.CreateDate);
        Map(x => x.HireDate);

        HasMany(x => x.MyEmployeeToJobTitleMatchLinks)
            .Inverse()
            .Cascade.All()
            .KeyColumn("TheEmployeeUUID")
            ;

    }
}





public class JobTitleMap : ClassMap<JobTitle>
{
    public JobTitleMap()
    {
        Id(x => x.JobTitleUUID).GeneratedBy.GuidComb();

        OptimisticLock.Version();
        Version(x => x.TheVersionProperty)
            .Column("MyVersionColumn")
            .Not.Nullable()
            .CustomSqlType("timestamp")
            .Generated.Always();


        Map(x => x.JobTitleName);
        Map(x => x.CreateDate);
        HasMany(x => x.MyJobTitleToEmployeeMatchLinks)
            .Inverse()
            .Cascade.All()
            .KeyColumn("TheJobTitleUUID")
        ;   

    }
}



public class EmployeeToJobTitleMatchLinkMap : ClassMap<EmployeeToJobTitleMatchLink>
{

    public EmployeeToJobTitleMatchLinkMap()
    {
        Id(x => x.LinkSurrogateUUID).GeneratedBy.GuidComb();
        Map(x => x.PriorityRank);
        Map(x => x.JobStartedOnDate);

        References(x => x.TheEmployee).Column("TheEmployeeUUID").Not.Nullable();/*Bad naming convention with "The", but left here so it can be seen easily in the DDL*/
        References(x => x.TheJobTitle).Column("TheJobTitleUUID").Not.Nullable();/*Bad naming convention with "The", but left here so it can be seen easily in the DDL*/

    }
}

谢谢内森！

PS 我在谷歌搜索/搜索自己时学到的一个新术语是

“客观化的关系”

它在这个页面的评论区： LINK1

万一该页面在未来某个时候死掉，这里是粘贴的评论：

它被称为“对象化关系”（参考：http ://www.orm.net ），在 NIAM/ORM 中，它通常被定义为一种关系，它本身就是一个具有属性的实体。一个客观化的关系总是形成至少一个 m:n 的关系。（来自http://weblogs.asp.net/fbouma/）

4

1 回答 1

1

我认为您需要将 KeyColumn("key-name") 作为 HasMany 映射的一部分添加到 JobTitleMap 和 EmplyeeMap。这是因为 fluent-nhibernate 使用约定在 EmployeeToJobTitleMatchLink 表中创建 FK。使用 KeyColumn 作为 HasMay 映射的一部分应该覆盖约定。

类似于以下内容：-

public class JobTitleMap : ClassMap<JobTitle> 
{ 
    public JobTitleMap() 
    { 
        Id(x => x.JobTitleUUID).GeneratedBy.GuidComb(); 

        OptimisticLock.Version(); 
        Version(x => x.TheVersionProperty) 
            .Column("MyVersionColumn") 
            .Not.Nullable() 
            .CustomSqlType("timestamp") 
            .Generated.Always(); 

        Map(x => x.JobTitleName); 
        Map(x => x.CreateDate); 
        HasMany(x => x.MyJobTitleToEmployeeMatchLinks) 
            .Inverse() 
            .Cascade.All()
            **.KeyColumn("TheJobTitleUUID")**
    } 
}
于 2011-10-28T14:14:26.630 回答