0001576: @OneTOMany and Inheritance problem

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Severity

Reproducibility

Date Submitted

Last Update

0001576

[Resin]

major

always

01-21-07 11:19

04-12-07 20:27

Reporter

bregnvig

View Status

public

Assigned To

westrupp

Priority

normal

Resolution

fixed

Status

closed

Product Version

3.1.1

Summary

0001576: @OneTOMany and Inheritance problem

Description

I'm going through your Amber tutorial. Works like a charm. I decide to play a bit with it so I expanded the “course” table with a discriminator column and another column called “formula”.

I introduce a new class called RaceCourse, which extends from the Course class. With the following annotations:

Course:
@Entity
@Table(name = "amber_basic_course")
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name="discriminator", discriminatorType=DiscriminatorType.STRING)
@DiscriminatorValue(value = "course")

RaceCourse:
@Entity
@DiscriminatorValue(value="race")

It works perfectly. So I create a class and table called participant. And a ManyToOne relation from the participant to the table:

@ManyToOne@JoinColumn(name="course_id", nullable=false)
public Course getCourse() {
return course;
}

Course_id is a foreign key to the course table. This also works perfectly.

Finally I introduce the @OneToMany in the Course class:

@OneToMany(cascade=CascadeType.ALL, mappedBy="course")
public Set<Participant> getParticipants() {
return participants;
}

I can get the participants from the courses. No problem. The problem is the RaceCourse is no longer loaded properly (I use annotation on the properties not the fields). The setter methods for teacher, and formula are no longer called. Removing the getParticipants and setParticipants methods from the course class makes it all work perfectly again.

To me it seems like there is a problem with one to many and inheritance. I can reproduce this every time. I have attached the code if you would like to look at it.

Additional Information

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Notes
(0001841) westrupp 04-12-07 20:27	jpa/0l4c

Issue History
Date Modified	Username	Field	Change
01-21-07 11:19	bregnvig	New Issue
04-12-07 20:26	westrupp	Status	new => assigned
04-12-07 20:26	westrupp	Assigned To	=> westrupp
04-12-07 20:27	westrupp	Status	assigned => closed
04-12-07 20:27	westrupp	Note Added: 0001841
04-12-07 20:27	westrupp	Resolution	open => fixed
04-12-07 20:27	westrupp	Fixed in Version	=> 3.1.1

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