Question

I have a problem with Hibernate one-to-many unidirection association.

class Parent{
  int id;
  set <Child> children;
}

class Child{
  int id;
  int name;
  int birthday;
}

Parent.hbm.xml

<hibernate-mapping>
 <class name="Parent" table="parent"/>
 <id name="id" column="id_parent"/>
 <set name="children" inverse="false" cascade="all">
   <key column="id_parent"/>
   <one-to-many class="Child"/>
 </set>

</hibernate-mapping>

Child.hbm.xml

<hibernate-mapping>
     <class name="Child" table="parent"/>
     <id name="id" column="id_child"/>
     <property = "birthday"/>    
     <property="name"/>
    </hibernate-mapping>

in the mapping file, I use one-to-many unidirection association by setting inverse=”false”.

How to select the right child with the his name, birthday and parent ID infos?

best regards
Thanks!

Answer 1

select child from Parent p inner join p.children child
where p.id = :parentId and child.name = :name and child.birthday = :birthday

Read on HQL in the excellent Hibernate documentation.