如何在NH3.2中实现多到多关系的.ChildWhere()映射

Question

我有以下FNH地图：

public class ItemMap : ClassMap<Item>
{
   public ItemMap ()
   {
       this.HasManyToMany(a => a.ChildItems).ChildWhere("IsDeleted = 0").AsSet();
   }
}

结果hbm文件为：

<hibernate-mapping>
  <class name="Item" table="Item">
    <set name="ChildItems" table="ItemsToChildItems">
      ...
      <many-to-many class="ChildItem" where="IsDeleted = 0">
        <column name="ChildItemId" />
      </many-to-many>
    </set>
  </class>
</hibernate-mapping>

我希望使用NHibernate 3.2的“按代码特性进行性感映射:-) /一致性方法”实现相同的映射。

注意：以下方法不起作用：

public class ItemMap : ClassMapping<Item>
{
   public ItemMap()
   {
      this.Set(x => x.ChildItems
      , map =>
      {
         map.Where("IsDeleted = 0");
      }
      , action => action.ManyToMany());
   }
}

，因为：，它遵循FNH映射：

public class ItemMap : ClassMap<Item>
{
   public ItemMap ()
   {
      this.HasManyToMany(a => a.ChildItems).Where("IsDeleted = 0").AsSet();
   }
}

.Where("IsDeleted = 0")和.ChildWhere("IsDeleted = 0")不一样。

HBM差异：

结果使用.ChildWhere("IsDeleted = 0")的hbm文件是：

<hibernate-mapping>
  <class name="Item" table="Item">
    <set name="ChildItems" table="ItemsToChildItems">
      ...
      <many-to-many class="ChildItem" where="IsDeleted = 0">
        <column name="ChildItemId" />
      </many-to-many>
    </set>
  </class>
</hibernate-mapping>

结果使用.Where("IsDeleted = 0")的hbm文件是：

<hibernate-mapping>
  <class name="Item" table="Item">
    <set name="ChildItems" table="ItemsToChildItems" where="IsDeleted = 0">
      ...
      <many-to-many class="ChildItem">
        <column name="ChildItemId" />
      </many-to-many>
    </set>
  </class>
</hibernate-mapping>

谁有类似的问题或能提供解决方案？需要帮助。

Answer 1

我也遇到了同样的问题，我找到了一个解决办法：

https://nhibernate.jira.com/browse/NH-2997

解决办法分三个步骤：

1)向IManyToManyMapper接口添加新的接口方法：

public interface IManyToManyMapper : IColumnsMapper {

`void Where(string sqlWhereClause);  }`

2)在ManyToManyCustomizer类中实现新方法：

public void Where(string sqlWhereClause) { customizersHolder.AddCustomizer(propertyPath, (IManyToManyMapper x) => x.Where(sqlWhereClause)); }

3)在ManyToManyMapper类中实现新方法：

public void Where(string sqlWhereClause) { manyToMany.where = sqlWhereClause; }