Retrieving and loading third level refferenced classes through HQL

Question

I have the following class setup for a Student in Hibernate. Class student contains a set of Score objects. Each score object contains the score, student id, and a gradeEvent object. A grade event object contains things such as date, description, etc. I want to fetch a student and load all there associated score objects and the gradeEvent object associated with each Score object that has been fetched. The following HQL lets me access a Student object with the fields of the associated Score objects accept for gradeEvent

"from Student student left join fetch student.scores where student.studentId=1"

How can I load the gradeEvent object at query time so I can access it after the session's been closed? I've put the relevant sections of my mapping files below.

student

<set name="scores" inverse="true" lazy="true" table="score" fetch="select">
<key>
<column name="student_id" not-null="true" />
</key>
<one-to-many class="gradebook.model.Score" />
</set>

score

<many-to-one name="student" class="gradebook.model.Student" update="false" insert="false" fetch="select">
<column name="student_id" not-null="true" />
</many-to-one>
<many-to-one name="gradeEvent" class="gradebook.model.GradeEvent" update="false" insert="false" fetch="select">
<column name="event_id" not-null="true" />
</many-to-one>

gradeEvent

<set name="scores" inverse="false" lazy="true" table="score" fetch="select">
<key>
<column name="event_id" not-null="true" />
</key>
<one-to-many class="gradebook.model.Score" />
</set>

Answer 1

You can access it exactly the same way you did with scores; you just need to assign an alias to collection so you can refer to it again:

from Student student
 left join fetch student.scores score
 left join fetch score.gradeEvent
where student.studentId=1