NHibernate 中级 table 按代码映射

Question

我知道在 Whosebug 上有与此主题类似的问题，但其中 none 可以解决我的问题。我现在坚持了至少两天。所以这是我的问题：

我有两个 table 有 Many-To-Many 关系，像这样：

Department * - * Person

我不想使用 Many-To-Many 关系，而是两个 Many-To-One 并将 link table 定义为实体。

link table 应该叫 "Lam".

我的实体

public class Department
{
    public virtual int Id { get; set; }
    public virtual IList<Lam> Lams { get; set; }
}

public class Person
{
    public virtual int Id { get; set; }
    public virtual IList<Lam> Lams { get; set; }
}

public class Lam
{
    public virtual Department Department { get; set; }
    public virtual Person Person { get; set; }
}

我的映射

public class DepartmentMapping : ClassMapping<Department>
{
    public DepartmentMapping()
    {
        Id(x => x.Id, map => map.Generator(Generators.Native));

        Bag(x => x.Lams, col =>
        {
            col.Key(k => k.Column("DepartmentId"));
            col.Inverse(true);
        }, r => r.OneToMany());
    }
}

public class PersonMapping : ClassMapping<Person>
{
    public PersonMapping()
    {
        Id(x => x.Id, map => map.Generator(Generators.Native));

        Bag(x => x.Lams, col =>
        {
            col.Key(k => k.Column("PersonId"));
            col.Inverse(true);
        }, r => r.OneToMany());
    }
}

配对映射：

public class LamMapping : ClassMapping<Lam>
{
    public LamMapping()
    {
        ManyToOne(x => x.Department, map =>
        {
            map.Column("DepartmentId");
        });

        ManyToOne(x => x.Person, map =>
        {
            map.Column("PersonId");
        });
    }
}

如果我尝试运行我的应用程序，我收到以下错误消息：

Incorrect syntax near 'Index'. If this is intended as a part of a table hint, A WITH keyword and parenthesis are now required. See SQL Server Books Online for proper syntax.

有人可以告诉我，我的代码有什么问题吗？

Answer 1

映射原样是正确的（至少对我来说是一样的）。所以，问题是你的例外是从哪里来的？

让我们SQLSELECT查询您的简化table/entity人：

SELECT id FROM Person

那行得通。

但是如果 - 在你的映射的未显示部分 - 存在人的一些属性，假设 Index 像这样：

// entity
public class Person
{
    ...
    // C# property named Index
    public virtual int Index { get; set; }
    ...
// mapping
public class PersonMapping : ClassMapping<Person>
{
    public PersonMapping()
    {
        ...
        // that by default would be column Index
        Property(x => x.Index)

这会导致 SELECT 像这样

SELECT id, Index FROM Person

而在 SQL 服务器世界中，这将导致错误：

Msg 1018, Level 15, State 1, Line 1 Incorrect syntax near 'Index'. If this is intended as a part of a table hint, A WITH keyword and parenthesis are now required.

所以，因为你上面显示的映射是正确的，所以我怀疑有这样的部分

如果是这种情况，我们可以使用

...
Property(x => x.Index, x => { x.Column("[Index]"); });

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