我在两个表之间有一个OneToMany / ManyToOne关系。表Partition中有一个外键引用id of Event。当我调用event.getPartitions() (应该返回一个Event中包含所有Partitions的列表)时,我会得到以下异常:
Caused by: org.hibernate.exception.SQLGrammarException: could not extract ResultSet.
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax.dialect设置为org.hibernate.dialect.MySQL5Dialect,driver class设置为com.mysql.jdbc.Driver。
getPartitions:
@XmlTransient
@OneToMany(mappedBy = "event")
public Collection<Partition> getPartitions()
{
return partitions;
}getEvent:
@XmlTransient
@ManyToOne
@JoinColumn(name = "event_id", referencedColumnName = "id", nullable = false)
public Event getEvent()
{
return event;
}事件:
DROP TABLE IF EXISTS `event`;
CREATE TABLE `event` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`title` varchar(1024) NOT NULL,
`description` varchar(1024) DEFAULT NULL,
`img` varchar(1024) DEFAULT NULL,
`date` date DEFAULT NULL,
`location` varchar(1024) DEFAULT NULL,
`information` varchar(1024) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;分区:
DROP TABLE IF EXISTS `partition`;
CREATE TABLE `partition` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`event_id` int(11) NOT NULL,
`title` varchar(1024) DEFAULT NULL,
`description` varchar(1024) DEFAULT NULL,
`active_timestamp` datetime DEFAULT NULL,
`position` int(11) NOT NULL,
PRIMARY KEY (`id`),
KEY `event_id` (`event_id`),
CONSTRAINT `event_partition` FOREIGN KEY (`event_id`) REFERENCES `event` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=15 DEFAULT CHARSET=utf8;下面的查询被原谅了,在我看来也不错:
10:44:04,708 INFO [stdout] (default task-4) Hibernate: select event0_.id as id1_1_0_, event0_.date as date2_1_0_, event0_.description as descript3_1_0_, event0_.img as img4_1_0_, event0_.information as informat5_1_0_, event0_.location as location6_1_0_, event0_.title as title7_1_0_ from Event event0_ where event0_.id=?
10:44:04,818 INFO [stdout] (default task-4) Hibernate: select partitions0_.event_id as event_id6_1_0_, partitions0_.id as id1_2_0_, partitions0_.id as id1_2_1_, partitions0_.active_timestamp as active_t2_2_1_, partitions0_.description as descript3_2_1_, partitions0_.event_id as event_id6_2_1_, partitions0_.position as position4_2_1_, partitions0_.title as title5_2_1_ from Partition partitions0_ where partitions0_.event_id=?发布于 2015-05-19 09:02:53
Partition在MySQL中是保留字,将表名更改为其他(实体名称可以保持不变,只需使用@Table注释来配置新的表名)。
https://stackoverflow.com/questions/30321026
复制相似问题