Hibernate 带有@JoinTable的单向@OneToMany不更新联接表
我正在尝试使用Spring Boot、JPA、QueryDsl和内存H2数据库实现单向一对多映射。当我通过schema.sql插入数据时,正确检索文件关系。问题在于将新对象存储到事件表时 Schema.sqlHibernate 带有@JoinTable的单向@OneToMany不更新联接表,hibernate,spring-boot,jpa,one-to-many,querydsl,Hibernate,Spring Boot,Jpa,One To Many,Querydsl,我正在尝试使用Spring Boot、JPA、QueryDsl和内存H2数据库实现单向一对多映射。当我通过schema.sql插入数据时,正确检索文件关系。问题在于将新对象存储到事件表时 Schema.sql CREATE TABLE tag ( tag_id INTEGER NOT NULL PRIMARY KEY AUTO_INCREMENT, label VARCHAR(25) ); CREATE TABLE event ( event_id INTEGER
CREATE TABLE tag (
tag_id INTEGER NOT NULL PRIMARY KEY AUTO_INCREMENT,
label VARCHAR(25)
);
CREATE TABLE event (
event_id INTEGER NOT NULL PRIMARY KEY AUTO_INCREMENT,
owner_id INTEGER NOT NULL,
place_id INTEGER NOT NULL,
content TEXT,
thumbnail VARCHAR(100),
heading VARCHAR(50),
date_added DATE,
start_date DATE,
start_time TIME,
end_date DATE,
end_time TIME,
approved BOOL,
FOREIGN KEY (owner_id) REFERENCES user (user_id),
FOREIGN KEY (place_id) REFERENCES place (place_id)
);
CREATE TABLE event_tag (
event_id INTEGER NOT NULL,
tag_id INTEGER NOT NULL,
PRIMARY KEY (event_id,tag_id),
KEY fk_event (event_id),
KEY fk_tag (tag_id),
CONSTRAINT fk_tag FOREIGN KEY (tag_id) REFERENCES tag (tag_id),
CONSTRAINT fk_event FOREIGN KEY (event_id) REFERENCES event (event_id)
)
Event.java
@Entity
@Getter
@Setter
@EqualsAndHashCode
@Table(name = "event")
public class Event implements Serializable {
@Id
@GeneratedValue
@Column(name = "event_id")
protected Long id;
...
//todo: not working while saving
@OneToMany(cascade=CascadeType.ALL)
@JoinTable(
name = "event_tag",
joinColumns = @JoinColumn(name = "event_id"),
inverseJoinColumns = @JoinColumn(name = "tag_id")
)
private Set<Tag> tags;
...
}
这就是我在服务中存储事件的方式
EventService.java
public Optional<Event> create(Event event) {
try {
entityManager.unwrap(Session.class).save(event);
} catch (Exception e) {
e.printStackTrace();
}
return Optional.ofNullable(event);
}
我错过了什么?谢谢你的帮助。谢谢大家! 保存后不执行flush,因此不会生成SQL语句
调用flush或确保在事务上下文中执行create。您使用的是内存中的数据库,保存后不刷新。create方法是否有事务处理?啊,谢谢。我补充了这个作为答案。你能接受这个正确答案吗?谢谢你,嗯?你声称使用JPAAPI,然后中止它并使用一些Hibernate的东西?真奇怪。
public Optional<Event> create(Event event) {
try {
entityManager.unwrap(Session.class).save(event);
} catch (Exception e) {
e.printStackTrace();
}
return Optional.ofNullable(event);
}
spring.datasource.url=jdbc:h2:mem:testdb;MODE=MYSQL;DB_CLOSE_ON_EXIT=FALSE
spring.datasource.username=sa
spring.datasource.password=
spring.jpa.hibernate.ddl-auto=update
spring.datasource.driverClassName=org.h2.Driver
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
spring.h2.console.enabled=true