NHibernate的映射问题

Question

我无法弄清楚如何让我正确的映射与NHibernate 3.0

我有两个波苏斯：

public class Account 
{ 
    public virtual string AccountNumber { get; set; } 

    public virtual IList<AccountSummary> AccountSummaries { get; set; } 
} 

public class AccountSummary 
{ 
    public virtual uint Id { get; protected set; } 

    public virtual string AccountNumber { get; set; } 

    public virtual DateTime TradeDate { get; set; } 
} 

我想在班这样的表映射：

表：账户（柱：ACCOUNT_NUMBER）

表：account_summaries（柱：ID，柱：trade_date，柱：ACCOUNT_NUMBER）

如何避免在AccountSummary类中拥有Account对象，因为我通常会使用一对多/多对一映射。而不是我的AccountSummary类具有Account对象，我希望AccountSummary类具有Account类的属性，就像类定义中的AccountNumber属性一样，并引用了Account类。

我还想将trade_date和account_number列映射为natural-id或unique-key。

我的映射是这样的：

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" 
          assembly="FundAccountDBExperiment" 
          namespace="FundAccountDBExperiment.Models"> 
    <class name="Account" table="accounts"> 
    <composite-id> 
     <key-property name="AccountNumber" column="account_number" length="40"/> 
    </composite-id> 
    <bag name="AccountSummaries" table="account_summaries" cascade="all-delete-orphan" inverse="true"> 
     <key column="account_number"/> 
     <one-to-many class="AccountSummary"/> 
    </bag> 
    </class> 
</hibernate-mapping> 

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" 
          assembly="FundAccountDBExperiment" 
          namespace="FundAccountDBExperiment.Models"> 
    <class name="AccountSummary" table="account_summaries"> 
    <id name="Id" column="id"> 
     <generator class="native"/> 
    </id> 
    <property name="TradeDate" column="trade_date" type="date" not-null="true"/> 
    <join table="account"> 
     <key column="acount_number"/> 
    </join> 
    </class> 
</hibernate-mapping> 

任何形式的帮助，将不胜感激。

Answer 1

这不就够了吗？

public class AccountSummary 
{ 
    public virtual uint Id { get; protected set; } 

    public virtual Account Account { get; set; } 

    public virtual string AccountNumber 
    { 
     get { return Account.AccountNumber; } 
     set { Account.AccountNumber = value; } 
    } 

    public virtual DateTime TradeDate { get; set; } 
} 

和唯一约束见 “myUniqueIndex”

<class name="AccountSummary" table="account_summaries"> 
    <id name="Id" column="id"> 
     <generator class="native"/> 
    </id> 
    <property name="TradeDate" column="trade_date" type="date" not-null="true" index="myUniqueIndex" /> 
    <many-to-one column="acount_number" lazy="false" index="myUniqueIndex"> 
    </class> 

希望这有助于