org.hibernate.exception.ConstraintViolationException

[Babu Singh]

i am making a sample program using this link:http://www.vaannila.com/hibernate/hibernate-example/hibernate-mapping-one-to-one-1.html
i have following tables in sqlserver:

CREATE TABLE Student2
(
STUDENT_ID int NOT NULL,
LastName varchar(255) NOT NULL,
STUDENT_NAME varchar(255),
STUDENT_ADDRESS varchar(255),
UNIQUE (STUDENT_ADDRESS)
)
====
CREATE TABLE Address2
(
ADDRESS_ID int NOT NULL,
LastName varchar(255) NOT NULL,
ADDRESS_STREET varchar(255),
ADDRESS_CITY varchar(255),
ADDRESS_STATE varchar(255),
ADDRESS_ZIPCODE varchar(255),
)
====

i have take studentId type int in Student.hbm.xml:

<id name="studentId" type="int" column="STUDENT_ID">
            <generator class="native" />
        </id>

i have take addressId type int in Address.hbm.xml:

<id name="addressId" type="int" column="ADDRESS_ID">
         <generator class="native" />
      </id>

i am facing following exception:

org.hibernate.exception.ConstraintViolationException: could not insert: [com.vaannila.student.Address]
   at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
   at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
   at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:40)
   at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158)
   at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638)
   at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
   at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
   at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
   at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
   at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:94)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
   at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:507)
   at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:499)
   at org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:218)
   at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268)
   at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216)
   at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
   at org.hibernate.engine.Cascade.cascade(Cascade.java:130)
   at org.hibernate.event.def.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:431)
   at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:265)
   at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
   at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
   at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
   at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
   at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
   at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
   at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
   at com.vaannila.student.Main.main(Main.java:24)
Caused by: java.sql.SQLException: Cannot insert the value NULL into column 'ADDRESS_ID', table 'sample.dbo.Address2'; column does not allow nulls. INSERT fails.
   at net.sourceforge.jtds.jdbc.SQLDiagnostic.addDiagnostic(SQLDiagnostic.java:368)
   at net.sourceforge.jtds.jdbc.TdsCore.tdsErrorToken(TdsCore.java:2820)
   at net.sourceforge.jtds.jdbc.TdsCore.nextToken(TdsCore.java:2258)
   at net.sourceforge.jtds.jdbc.TdsCore.getMoreResults(TdsCore.java:632)
   at net.sourceforge.jtds.jdbc.JtdsStatement.processResults(JtdsStatement.java:584)
   at net.sourceforge.jtds.jdbc.JtdsStatement.executeSQL(JtdsStatement.java:546)
   at net.sourceforge.jtds.jdbc.JtdsPreparedStatement.executeUpdate(JtdsPreparedStatement.java:504)
   at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:73)
   at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33)
   ... 31 more

please help.

[Babu Singh]

please help me to resolve it.

[Wouter Oet]

Please remember that PatienceIsAVirtue.

[Sridhar Santhanakrishnan]

Caused by: java.sql.SQLException: Cannot insert the value NULL into column 'ADDRESS_ID', table 'sample.dbo.Address2'; column does not allow nulls. INSERT fails

You are trying to insert NULL to ADDRESS_ID and your table definition specifies the column to be not null. Use a proper not-null value.