nhibernate identifier of an instance of was altered from 16 to 1

[wanghao2979]

Category
protected long _id;
protected IList _sortRalSiteSortMaps;

配置文件
<class name="Category" table="Category">
<id name="Id" type="Int64" unsaved-value="null">
<column name="CategoryId" length="8" sql-type="bigint" not-null="true" unique="true" index="PK_Category"/>
<generator class="native" />
</id>
<bag name="SortRalSiteSortMaps" inverse="true" lazy="true" cascade="all-delete-orphan">
<key column="SortID"/>
<one-to-many class="RalSiteSortMap"/>
</bag>
</class>

RalSiteSortMap (关系表,)
protected long _id;
protected Category _sort;
配置文件
<id name="Id" type="Int64" unsaved-value="null">
<column name="id" length="8" sql-type="bigint" not-null="true" unique="true" index="PK_RalSiteSortMap"/>
<generator class="native" />
</id>
<many-to-one name="Sort" class="Category">
<column name="SortID" length="8" sql-type="bigint" not-null="true"/>
</many-to-one>

外键也建立好.
分类表Category,关系表RalSiteSortMap . 关系表中存放的是分类的ID
问题描述:当我向分类表插入数据时. 当关系表为空时,正常执行插入语句.当关系表不为空时，会报identifier of an instance of NHModel.Entities.RalSiteSortMap was altered from 16 to 1的错误.
百思不得其解，望指教

[wanghao2979]

public static bool Add(Category item)
{
ISession session = NHelper.GetCurrentSession();
ITransaction it = session.BeginTransaction();
bool flag = true;
try
{
session.Save(item);
session.Flush();
it.Commit();
}
catch (Exception ex)
{
flag = false;
it.Rollback();
throw (ex);
}
return flag;
}
执行函数

[wanghao2979]

哭@#%$^&*$%#^$%^#$%^#$%^#$%^#$%^&*((

[wanghao2979]

最后问题解决了，你们知道是为什么吗。因为进行数据操作的时候，session没有关闭，我cao @#$%#%^&$%^*$%^&#$%^ 调了二天。cao Q@#$%#$%^&*56

[threenewbee]

问题解决了？

[confidenceyu]

接分。。

[FOR-YOU]

呵呵 要细心

[wu_hong_min]

session没有关。。。。。