I have two classes

Subject
Question

Question.hbm.xml

<class name="Question" table="Question">
<id name="questionid" column="questionID" type="string"
unsaved-value="null">
<generator class="assigned" />
</id>
<property name="questiondescription"
column="questionDescription" type="java.lang.String" />
<property name="option1" column="option1"
type="java.lang.String" />
<property name="option2" column="option2"
type="java.lang.String" />
<property name="option3" column="option3"
type="java.lang.String" />
<property name="option4" column="option4"
type="java.lang.String" />

<many-to-one name="subject" column="subjectID"
class="Subject"
not-null="true">
</many-to-one>

</class>

Subject.hbm.xml
<class name="Subject" table="Subject">
<id name="subjectid" column="subjectID" type="string"
unsaved-value="null">
<generator class="assigned" />
</id>
<property name="subjectname" column="subjectName"
type="java.lang.String" />
<set name="questions" inverse="true"
cascade="all-delete-orphan">
<key column="subjectid"></key>
<one-to-many class="Question" />
</set>
</class>

Table Structure


Subject
----------
subjectID varchar
subjectName varchar

Question
----------
All fields are varchar
-----------------------
questionID
questionDescription
subjectID FK_SUBJECT_QUESTION
option1
option2
option3
option4

Classes contain usual geter-setter except
Subject has following,
getQuestions();
setQuestions();

addQuestion(Question q){
q.setSubject(this);
getQuestions().add(q);
}

Problem is
Question q = new Question(,,,);
q.setters are set

begintransaction
sub = (Subject) session.load(Subject.class, "TS12");
sub.addQuestion(q);
commit or flush();

this doesn't work, but
__________________
Question q = new Question(,,,);
q.setters are set

begintransaction
sub = (Subject) session.load(Subject.class, "TS12");
sub.addQuestion(q);
session.save(q);
commit or flush();
_______________
work correctly? where am i wrong?

Thanks
Nirav

Looks like you have to saveOrUpdate the new entity Question to get it persisted, and stored in the Subject. I believe this is the documented behavior.
Is it causing a problem to use the second, working technique?

Documentation doesn't tell that you have to persist Child explicitly if you are using inverse="true" and cascade="all", my problem is i don't want to write
session.save(OrUpdate)(question),

This should work according to docs.

Question q = new Question();
q.setters are set

Subject s = load existing

s.addQuestion(q);
flush or commit

Regards and Thanks
Nirav