我正在使用mysql和hibernate插入和更新表中的行。我使用saveOrUpdate调用。现在,当我尝试更新表中的一行时,我收到一个异常。异常状态表明我的列requestTime不能为空。显然它是真正的,因为我已经设置列属性为NotNull。休眠saveOrUpdate,更新需要原始行的所有字段
我可以添加该行。但是,当更新2列的值时,我会得到这个异常。
我假设当我更新时,我需要读取表中的行,并更新整个行。真的吗 ?我有点希望,休眠saveOrUpdate会为我做。所以我有一个Object,当我插入一个新行时,所有列都有getter。但是当我更新时,我有一个只有主键和新列的getter的对象。
Transaction txD;
Session session;
session = currentSession();
txD = session.beginTransaction();
session.saveOrUpdate(dataStore);
txD.commit();
异常
749368 [Thread-2] DEBUG org.hibernate.internal.util.EntityPrinter - com.mcruiseon.carpool.concrete.SubscribeProviderConcrete{acceptedTime=Mon Jul 30 03:39:23 UTC 2012, requestTime=null, subscriberIdentityHash=1218553253, requestIdentity=167093126, subscribedProviderHash=-284086361, isAccepted=true}
749375 [Thread-2] DEBUG org.hibernate.SQL - update carPoolSubscribedProvider set subscriberIdentityHash=?, requestTime=?, subscribedProviderHash=?, isAccepted=?, acceptedTime=? where requestIdentity=?
749398 [Thread-2] DEBUG org.hibernate.engine.jdbc.spi.SqlExceptionHelper - Column 'requestTime' cannot be null [n/a]
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'requestTime' cannot be null
SELECT * FROM carPoolSubscribedProvider
+-----------------+------------------------+---------------------+------------------------+------------+--------------+
| requestIdentity | subscriberIdentityHash | requestTime | subscribedProviderHash | isAccepted | acceptedTime |
+-----------------+------------------------+---------------------+------------------------+------------+--------------+
| 167093126 | -284086361 | 2012-07-27 16:13:19 | 1218553253 | 0 | NULL |
+-----------------+------------------------+---------------------+------------------------+------------+--------------+
编辑:
| carPoolSubscribedProvider | CREATE TABLE `carPoolSubscribedProvider` (
`requestIdentity` varchar(50) NOT NULL DEFAULT '',
`subscriberIdentityHash` varchar(100) NOT NULL,
`requestTime` datetime NOT NULL,
`subscribedProviderHash` varchar(100) DEFAULT NULL,
`isAccepted` tinyint(1) DEFAULT '0',
`acceptedTime` datetime DEFAULT NULL,
PRIMARY KEY (`requestIdentity`),
我是否需要有代码更新VS插入不同的流量?像if(update){row = getColumn(primaryKey),appendValues(row,newValues)} else else insert? – Siddharth 2012-07-30 11:47:38