cascade on foreign key in many to one associtaion

Question

I have two classes having parent and child relationship

<class name="parent">   
   <id name="id">    
      <generator class="assgned"/>   
   </id>   
   <property name="currency"/>
   <property name="description" length="400"> 
</class> 

<class name="child"> 
  <id name="id">    
<generator class="native"/>   
</id>
   <property name="someprop1"/>
   <property name="someprop2">
   <many-to-one class="Parent" column="parent_field" name="parent" cascade="save-    
    update" />
</class> 

when I insert a new row in child, it updates the existing row in child class instead of inserting a new row and mapping the new id with foreign key.

I think I am mistaken in choice of generator class and cascade option. Please help.

Answer 1

级联的映射应在父类中，并指向子类。.如果在父列表中添加新的子对象以及较旧的对象，则在保存父对象时..它将以自动递增的方式保存在新行中id（如果已配置），请记住，如果要将子代与父代一起保存，并且所有子代都在对象中设置了主键，它们将更新数据库中的现有行，因为这是正确的工作行为。