nhibernate单向一对多映射子实体数据记录中父实体ID未同时保存
当执行测试代码后,子实体和父实体均能保存到数据库,但是子实体对应的数据表中记录的父实体id的值全部为null,数据库为mysql,请问这是正常的么,是否需要设置双向映射后父实体ID才会同步保存?
1) father entity definition:
class father
{
public virtual string name;
public virtual string id;
public virtual IList<string> children;
}
2) child entity definition:
class child
{
public virtual string id;
public virtual string name;
}
3) mapping file for father
<class name ="father" table="dbfather">
<id name="id" column ="id">
<generator class ="assigned"/>
</id>
<property name ="name"/>
<bag name="ichild">
<key column="fatherid" />
<one-to-many class="child" />
</bag>
</class>
4) mapping file for child
<class name ="child" table="dbchild">
<id name="id" column ="id">
<generator class ="assigned"/>
</id>
<property name ="name"/>
</class>
5) test codes
var cfg = new NHibernate.Cfg.Configuration().Configure("hibernate.cfg.xml");
using (ISessionFactory sessionFactory = cfg.BuildSessionFactory())
{
ISession session = sessionFactory.OpenSession();
try
{
Child c = new Child();
c.id= Guid.NewGuid().ToString();
c.name= "test";
Father f = new Father();
f.id = Guid.NewGuid().ToString();
f.name= "ftest";
f.children.Add(child);
session.Save(c);
session.Save(f);
}
finally
{
session.Flush();
}
}