If an entity is mapped via an XML file, an ElementCollection cannot be annotated with OnDelete because hibernate complains that JoinColumn is missing. But JoinColumn is actually there.
The error message is
{quote}Unidirectional one-to-many associations annotated with @OnDelete must define @JoinColumn{quote}
The following test case demonstrates this behavior. Change the TRIGGER_BUG flag to observe how the test case is working when not using the XML file and how the bug occurs when using the XML file.
TODO{code: insertjava}/*
* Copyright 2014 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.hibernate.bugs;
import jakarta.persistence.*;
import org.hibernate.annotations.LazyCollection;
import org.hibernate.annotations.LazyCollectionOption;
import org.hibernate.annotations.OnDelete;
import org.hibernate.annotations.OnDeleteAction;
import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
import org.junit.Test;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.containsInAnyOrder;
import static org.hamcrest.Matchers.hasSize;
/**
* This test case once demonstrates that Hibernate 6.1.3 and earlier complains about a missing
* JoinColumn annotation, although this annotation is clearly there.
*/
public class TestHHH15510 extends BaseCoreFunctionalTestCase {
private static final boolean TRIGGER_BUG = true;
@Entity
@Table(name = "entity_hhh15510")
public static class EntityHHH15510 {
@Id
private Long id;
public EntityHHH15510() {
}
public void setId(Long id) {
this.id = id;
}
@ElementCollection
@CollectionTable(
name = "entity_hhh15510_strings",
joinColumns = @JoinColumn(name = "parent")
)
@LazyCollection(LazyCollectionOption.FALSE)
@JoinColumn(name = "parent")
@OnDelete(action = OnDeleteAction.CASCADE)
private Set<String> strings = new HashSet<>();
public void addString(String str) {
strings.add(str);
}
public Set<String> getStrings() {
return Collections.unmodifiableSet(strings);
}
}
@Override
protected Class<?>[] getAnnotatedClasses() {
return TRIGGER_BUG ? NO_CLASSES : new Class[]{EntityHHH15510.class};
}
@Override
protected String[] getMappings() {
return TRIGGER_BUG ? new String[]{"mappings.xml"} : NO_MAPPINGS;
}
@Test
public void hhh15510Test() {
// persist a new entity
try (final var s = openSession()) {
final var tx = s.beginTransaction();
final var e = new EntityHHH15510();
e.setId(1L);
e.addString("test01");
e.addString("test02");
s.persist(e);
tx.commit();
}
// verify that the issue ID entity was correctly persisted
try (final var s = openSession()) {
final var tx = s.beginTransaction();
final var e = s.get(EntityHHH15510.class, 1L);
final var strings = e.getStrings();
assertThat(strings, hasSize(2));
assertThat(strings, containsInAnyOrder("test01", "test02"));
tx.commit();
}
// natively check that child entries are present and natively delete the parent entity
try (final var s = openSession()) {
final var tx = s.beginTransaction();
final var strings = s.createNativeQuery("select strings from entity_hhh15510_strings", String.class).list();
assertThat(strings, hasSize(2));
assertThat(strings, containsInAnyOrder("test01", "test02"));
s.createNativeMutationQuery("delete from entity_hhh15510").executeUpdate();
tx.commit();
}
// natively check that child table is created empty (i.e. on delete cascade did its job)
try (final var s = openSession()) {
final var tx = s.beginTransaction();
final var strings = s.createNativeQuery("select strings from entity_hhh15510_strings", String.class).list();
assertThat(strings, hasSize(0));
tx.commit();
}
}
}
{code}
The mappings.xml:
{code:xml}<?xml version="1.0" encoding="UTF-8"?>
<entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"
version="1.0">
<entity class="org.hibernate.bugs.TestHHH15510$EntityHHH15510"/>
</entity-mappings>
{code} |
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