NHibernate中多对一关联的问题

Question

我有两节课：

public class Article
{
    private ISet<IdentNumber> identNumbers = new HashedSet<IdentNumber>();

    public virtual int ArticleId { get; set; }

    public virtual string ArticleNumber { get; set; }

    private virtual ISet<IdentNumber> IdentNumbers

    public virtual void AddIdentNumber(IdentNumber identNumber)
    {
        if (identNumber.Article != null && identNumber.Article.identNumbers != null)
        {
            identNumber.Article.identNumbers.Remove(identNumber);
        }

        identNumber.Article = this;
        this.IdentNumbers.Add(identNumber);
    }
}

public class IdentNumber
{
    public virtual int Number { get; set; }

    public virtual int ArticleId { get; set; }

    public virtual Article Article { get; set; }

    public override bool Equals(object obj)
    {
        if (obj == null)
        {
            return false;
        }

        var x = obj as IdentNumber;
        if (x == null)
        {
            return false;
        }

        return this.Number == x.Number && this.ArticleId == x.ArticleId;
    }

    public override int GetHashCode()
    {
        return (this.ArticleId + "|" + this.Number).GetHashCode();
    }
} 

这些对象应映射到旧数据库中的两个表Articles和IdentNumbers。 Artikles将ArtikleId（PK，int，不为null）作为标识列。 IdentNumbers具有复合PK。 数字（PK，整数，不为空）和ArticleId（PK，FK，整数，不为空）。

这是我到目前为止获得的映射文件：

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="Article" table="Articles">
    <id name="ArticleId" unsaved-value="0">
      <generator class="native" />
    </id>
    <property name="ArticleNumber" />
    <set name="IdentNumbers" table="IdentNumbers">
      <key column="ArticleId" />
      <many-to-many unique="true" class="IdentNumber" />  
    </set>
  </class>
</hibernate-mapping>

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="IdentNumber" table="IdentNumbers">
    <id name="ArticleId" column="ArticleId">
      <generator class="foreign">
        <param name="property">ArticleId</param>
      </generator>
    </id>
    <property name="Number" />
  </class>
</hibernate-mapping>

我想要上班的是这样的：

var article = new Article { ArticleNumber = "9876" };
var identNumber = new IdentNumber { Number = 1234 };
article.AddIdentNumber(identNumber);

session.Save(article);

对于我来说，我无法获得此复合pk，其中一部分是工作的外键。

谢谢您的帮助。

编辑：

多亏了Falcon，我的映射才正确。

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="Article" table="Articles">
    <id name="ArticleId" unsaved-value="0">
      <generator class="native" />
    </id>
    <property name="ArticleNumber" />
    <set name="IdentNumbers" table="IdentNumbers" cascade="all">
      <key column="ArticleId" />
      <one-to-many class="IdentNumber" />  
    </set>
  </class>
</hibernate-mapping>

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="IdentNumber" table="IdentNumbers">
    <composite-id>
      <key-many-to-one name="Article" column="ArticleId"/>
      <key-property name="Number" />
    </composite-id>
  </class>
</hibernate-mapping>

Answer 1

您不需要ArticleID！ 只需将Reference映射到Article类作为PK的一部分即可！ 当您设置IdentNumber的Article时，您已经将密钥的这一部分进行了统计。