NHibernate的三元關係映射

Question

我有以下表

CREATE TABLE track 
ID 
name 

CREATE TABLE people 
ID 
firstname 

CREATE TABLE role 
ID 
name 

CREATE TABLE track_people_role 
track_id 
people_id 
role_id 

和下面的映射文件

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="App.Data.BusinessObjects" assembly="App.Data"> 
<class name="App.Data.BusinessObjects.Track, App.Data" table="track" lazy="true"> 
    <id name="Id" column="ID"> 
     <generator class="native" /> 
    </id> 
    <property name="Name" column="name" /> 
</class> 

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="App.Data.BusinessObjects" assembly="App.Data"> 
<class name="App.Data.BusinessObjects.People, App.Data" table="people" lazy="true"> 
    <id name="Id" column="ID"> 
     <generator class="native" /> 
    </id> 
    <property name="Firstname" column="firstname" /> 

</class> 

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="App.Data.BusinessObjects" assembly="App.Data"> 
<class name="App.Data.BusinessObjects.Role, App.Data" table="role" lazy="true"> 
    <id name="Id" column="ID"> 
     <generator class="native" /> 
    </id> 
    <property name="Name" column="name" /> 
</class> 

我很難嘗試配置track_people_role表的映射。有人能幫我嗎？

我在中間表中有下面的行。主鍵是三列的組合。

 
track_id people_id role_id 
14292  1   1 
14292  1   2 


track_id people_id role_id 
1200  1   1 
1200  2   1 

Answer 1

省略所有的細節，下面是一個工作示例。

類：

class Track 
{ 
    ... 
    public virtual IDictionary<People, Role> PeopleRoles { get; set; } 
} 

映射：

<class name="Track" ...> 
    ... 
    <map name="PeopleRoles" table="track_people_role"> 
    <key column="track_id"/> 
    <map-key-many-to-many column="people_id" class="People"/> 
    <many-to-many column="role_id" class="Role"/> 
    </map> 
</class> 

這麼簡單，因爲它是，它包含了許多假設......不要猶豫，問。