We have Object(1) Linked to another Object (2). both of them are not in DB. they are only in operation memory.

I want save 1 to DB , together with 2.

but when i save 1-st Object to DB, 2nd Object doesnt saved.

please tell me how to do this

Source Cat:

public class Cat {

int cat_id;
int age;
String nick;
}

<hibernate-mapping>
<class name="test.hibernate.Cat" table="cat">
<id name="cat_id" type="integer" unsaved-value="null" >
<column name="cat_id" sql-type="integer"
not-null="true"/>
<generator class="vm"/>
</id>
<property name="age">
<column name="age" sql-type="integer" not-null="true"/>
</property>

<property name="nick">
<column name="nick" sql-type="varchar" not-null="true"/>
</property>

</class>

</hibernate-mapping>

Source Dog:


public class Dog {

int dog_id;
int age;
String nick;
Cat cat;
}

<hibernate-mapping>
<class name="test.hibernate.Dog" table="dog">
<id name="dog_id" type="integer" unsaved-value="null" >
<column name="dog_id" sql-type="integer"
not-null="true"/>
<generator class="vm"/>
</id>
<property name="age">
<column name="age" sql-type="integer" not-null="true"/>
</property>

<property name="nick">
<column name="nick" sql-type="varchar" not-null="true"/>
</property>

<many-to-one name="cat" class="test.hibernate.Cat"
cascade="all"column="cat_id" />

</class>

</hibernate-mapping>

Cat must saves, because of cascade="all", but the program throws exception


C:\j2sdk1.4.2_04\bin\javaw.exe -classpath C:\j2sdk1.4.2_04\jre\lib\charsets.jar;C:\j2sdk1.4.2_04\jre\lib\jce.jar;C:\j2sdk1.4.2_04\jre\lib\jsse.jar;C:\j2sdk1.4.2_04\jre\lib\plugin.jar;C:\j2sdk1.4.2_04\jre\lib\rt.jar;C:\j2sdk1.4.2_04\jre\lib\sunrsasign.jar;C:\j2sdk1.4.2_04\jre\lib\ext\dnsns.jar;C:\j2sdk1.4.2_04\jre\lib\ext\ldapsec.jar;C:\j2sdk1.4.2_04\jre\lib\ext\localedata.jar;C:\j2sdk1.4.2_04\jre\lib\ext\sunjce_provider.jar;D:\progs\hello_hibernate\classes;D:\progs\hello_hibernate\lib;D:\progs\hello_hibernate\lib\hibernate2.jar;D:\progs\hello_hibernate\lib\oracle.jar;D:\progs\hello_hibernate\lib\dom4j-1.4.jar;D:\progs\hello_hibernate\lib\ehcache-0.7.jar;D:\progs\hello_hibernate\lib\cglib-full-2.0.1.jar;D:\progs\hello_hibernate\lib\commons-logging-1.0.3.jar;D:\progs\hello_hibernate\lib\commons-collections-2.1.jar;D:\progs\hello_hibernate\lib\jta.jar;D:\progs\hello_hibernate\lib\odmg-3.0.jar;D:\progs\hello_hibernate\lib\log4j.jar test.hibernate.Dog
16:01:53,668 INFO Environment:462 - Hibernate 2.1.4
16:01:53,748 INFO Environment:496 - loaded properties from resource hibernate.properties: {hibernate.connection.driver_class=oracle.jdbc.driver.OracleDriver, hibernate.cglib.use_reflection_optimizer=true, hibernate.cache.provider_class=net.sf.ehcache.hibernate.Provider, hibernate.cache.use_query_cache=true, hibernate.max_fetch_depth=1, hibernate.dialect=net.sf.hibernate.dialect.Oracle9Dialect, hibernate.jdbc.use_streams_for_binary=true, hibernate.jdbc.batch_size=0, hibernate.query.substitutions=true 1, false 0, yes 'Y', no 'N', hibernate.proxool.pool_alias=pool1, hibernate.connection.username=HLYSTOV_HIBERNATE, hibernate.cache.region_prefix=hibernate.test, hibernate.connection.url=jdbc:oracle:thin:@cmt:1521:esmt, hibernate.connection.password=HLYSTOV_HIBERNATE, hibernate.connection.pool_size=1}
16:01:53,778 INFO Environment:521 - using java.io streams to persist binary types
16:01:53,818 INFO Environment:522 - using CGLIB reflection optimizer
16:01:54,038 INFO Configuration:347 - Mapping resource: test/hibernate/Dog.hbm.xml
16:01:56,502 INFO Binder:229 - Mapping class: test.hibernate.Dog -> dog
16:01:57,493 INFO Configuration:347 - Mapping resource: test/hibernate/Cat.hbm.xml
16:01:57,784 INFO Binder:229 - Mapping class: test.hibernate.Cat -> cat
16:01:57,794 INFO Configuration:613 - processing one-to-many association mappings
16:01:57,794 INFO Configuration:622 - processing one-to-one association property references
16:01:57,794 INFO Configuration:647 - processing foreign key constraints
16:01:58,234 INFO Dialect:82 - Using dialect: net.sf.hibernate.dialect.Oracle9Dialect
16:01:58,254 INFO SettingsFactory:58 - Maximim outer join fetch depth: 1
16:01:58,254 INFO SettingsFactory:62 - Use outer join fetching: true
16:01:58,294 INFO DriverManagerConnectionProvider:42 - Using Hibernate built-in connection pool (not for production use!)
16:01:58,304 INFO DriverManagerConnectionProvider:43 - Hibernate connection pool size: 1
16:01:58,755 INFO DriverManagerConnectionProvider:77 - using driver: oracle.jdbc.driver.OracleDriver at URL: jdbc:oracle:thin:@cmt:1521:esmt
16:01:58,765 INFO DriverManagerConnectionProvider:78 - connection properties: {user=HLYSTOV_HIBERNATE, password=HLYSTOV_HIBERNATE}
16:01:58,795 INFO TransactionManagerLookupFactory:33 - No TransactionManagerLookup configured (in JTA environment, use of process level read-write cache is not recommended)
16:02:00,958 INFO SettingsFactory:102 - Use scrollable result sets: true
16:02:00,958 INFO SettingsFactory:105 - Use JDBC3 getGeneratedKeys(): false
16:02:00,968 INFO SettingsFactory:108 - Optimize cache for minimal puts: false
16:02:00,968 INFO SettingsFactory:117 - Query language substitutions: {no='N', true=1, yes='Y', false=0}
16:02:00,968 INFO SettingsFactory:128 - cache provider: net.sf.ehcache.hibernate.Provider
16:02:00,998 INFO Configuration:1093 - instantiating and configuring caches
16:02:01,609 INFO SessionFactoryImpl:119 - building session factory
16:02:03,101 INFO SessionFactoryObjectFactory:82 - no JNDI name configured
16:02:03,111 INFO UpdateTimestampsCache:35 - starting update timestamps cache at region: net.sf.hibernate.cache.UpdateTimestampsCache
16:02:03,191 WARN Configurator:123 - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/D:/progs/hello_hibernate/lib/ehcache-0.7.jar!/ehcache-failsafe.xml
16:02:03,272 WARN Plugin:95 - Could not find configuration for net.sf.hibernate.cache.UpdateTimestampsCache. Configuring using the defaultCache settings.
16:02:03,352 INFO QueryCache:39 - starting query cache at region: net.sf.hibernate.cache.QueryCache
16:02:03,362 WARN Plugin:95 - Could not find configuration for net.sf.hibernate.cache.QueryCache. Configuring using the defaultCache settings.
[-500] Bunny, 4 years. Cat - [50] Mistery, 1 years


16:02:04,063 ERROR SessionImpl:2375 - Could not synchronize database state with session
net.sf.hibernate.HibernateException: SQL insert, update or delete failed (row not found)
at net.sf.hibernate.impl.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:25)
at net.sf.hibernate.persister.EntityPersister.update(EntityPersister.java:689)
at net.sf.hibernate.persister.EntityPersister.update(EntityPersister.java:642)
at net.sf.hibernate.impl.ScheduledUpdate.execute(ScheduledUpdate.java:52)
at net.sf.hibernate.impl.SessionImpl.executeAll(SessionImpl.java:2414)
at net.sf.hibernate.impl.SessionImpl.execute(SessionImpl.java:2368)
at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2236)
at net.sf.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:61)
at test.hibernate.Dog.saveDog(Dog.java:72)
at test.hibernate.Dog.main(Dog.java:114)
16:02:04,113 WARN SessionImpl:3386 - afterTransactionCompletion() was never called
16:02:04,113 WARN SessionImpl:3396 - unclosed connection
net.sf.hibernate.HibernateException: SQL insert, update or delete failed (row not found)
at net.sf.hibernate.impl.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:25)
at net.sf.hibernate.persister.EntityPersister.update(EntityPersister.java:689)
at net.sf.hibernate.persister.EntityPersister.update(EntityPersister.java:642)
at net.sf.hibernate.impl.ScheduledUpdate.execute(ScheduledUpdate.java:52)
at net.sf.hibernate.impl.SessionImpl.executeAll(SessionImpl.java:2414)
at net.sf.hibernate.impl.SessionImpl.execute(SessionImpl.java:2368)
at net.sf.hibernate.impl.SessionImpl.flush(SessionImpl.java:2236)
at net.sf.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:61)
at test.hibernate.Dog.saveDog(Dog.java:72)
at test.hibernate.Dog.main(Dog.java:114)
Process terminated with exit code 0

Your IDs are set up with an unsaved value as NULL. However your id datatypes are primitives (int) which will never in a million years be null :)

They will default to 0, so in essence you are telling hibernate to update your Cat and Dog since you're telling them by your mapping that they're already saved.

thank a lot!!!!!!!!!!!!! i've been beeting this problem for two days you save me!