I able to generate the schema but when I try to insert, I am getting the error com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityCons traintViolationException: Column 'id' cannot be null. My Phone table primary key is a composite key consisting of phoneNumber and foreign key id.
I have my classes as below
Student.java
Phone.java
PhonePK.java
hibernate.cfg.xml
Main.java
Console output
I have my classes as below
Student.java
Code:
import java.io.Serializable;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
@Entity
@SuppressWarnings("serial")
public class Student implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int id;
private String fName;
private String lName;
private String mname;
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "id")
private Set<Phone> phones;
/**
* @return the fName
*/
public String getfName() {
return fName;
}
/**
* @return the id
*/
public int getId() {
return id;
}
/**
* @return the lName
*/
public String getlName() {
return lName;
}
/**
* @return the mname
*/
public String getMname() {
return mname;
}
/**
* @return the phones
*/
public Set<Phone> getPhones() {
return phones;
}
/**
* @param fName
* the fName to set
*/
public void setfName(final String fName) {
this.fName = fName;
}
/**
* @param id
* the id to set
*/
public void setId(final int id) {
this.id = id;
}
/**
* @param lName
* the lName to set
*/
public void setlName(final String lName) {
this.lName = lName;
}
/**
* @param mname
* the mname to set
*/
public void setMname(final String mname) {
this.mname = mname;
}
/**
* @param phones
* the phones to set
*/
public void setPhones(final Set<Phone> phones) {
this.phones = phones;
}
}Code:
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.IdClass;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
@IdClass(PhonePK.class)
@Entity
@SuppressWarnings("serial")
public class Phone implements Serializable {
@Id
private String phoneNumber;
@Id
@ManyToOne
@JoinColumn(name = "id", insertable = false, updatable = false)
private Student student;
private String color;
/**
* @return the color
*/
public String getColor() {
return color;
}
/**
* @return the phoneNumber
*/
public String getPhoneNumber() {
return phoneNumber;
}
/**
* @return the student
*/
public Student getStudent() {
return student;
}
/**
* @param color
* the color to set
*/
public void setColor(final String color) {
this.color = color;
}
/**
* @param phoneNumber
* the phoneNumber to set
*/
public void setPhoneNumber(final String phoneNumber) {
this.phoneNumber = phoneNumber;
}
/**
* @param student
* the student to set
*/
public void setStudent(final Student student) {
this.student = student;
}
}Code:
import java.io.Serializable;
@SuppressWarnings("serial")
public class PhonePK implements Serializable {
private String phoneNumber;
private Student student;
/**
* @return the phoneNumber
*/
public String getPhoneNumber() {
return phoneNumber;
}
/**
* @return the student
*/
public Student getStudent() {
return student;
}
/**
* @param phoneNumber
* the phoneNumber to set
*/
public void setPhoneNumber(final String phoneNumber) {
this.phoneNumber = phoneNumber;
}
/**
* @param student
* the student to set
*/
public void setStudent(final Student student) {
this.student = student;
}
}Code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password">pwd</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test</property>
<property name="hibernate.connection.username">user</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.pool_size">1</property>
<property name="show_sql">true</property>
<property name="hbm2ddl.auto">create</property>
<property name="hibernate.show_sql">true</property>
</session-factory>
</hibernate-configuration>Code:
import java.util.LinkedHashSet;
import java.util.Set;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
public class Main {
public static void main(final String args[]) {
Configuration configuration = new Configuration();
Transaction transaction = null;
configuration.addAnnotatedClass(Student.class);
configuration.addAnnotatedClass(Phone.class);
configuration.addAnnotatedClass(PhonePK.class);
configuration.configure("hibernate.cfg.xml");
SessionFactory sessionFactory = configuration.buildSessionFactory();
Session session = sessionFactory.openSession();
Student student = new Student();
student.setfName("Bob");
student.setlName("Buster");
Set<Phone> phones = new LinkedHashSet<Phone>();
Phone ph1 = new Phone();
ph1.setColor("Black");
ph1.setPhoneNumber("1111111111");
Phone ph2 = new Phone();
ph2.setColor("Blue");
ph2.setPhoneNumber("2222222222");
phones.add(ph1);
phones.add(ph2);
student.setPhones(phones);
try {
transaction = session.beginTransaction();
session.save(student);
transaction.commit();
} catch (HibernateException e) {
transaction.rollback();
e.printStackTrace();
} finally {
session.close();
}
}
}Console output
Code:
Jun 29, 2013 11:22:49 AM org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.2.Final}
Jun 29, 2013 11:22:49 AM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.2.2.Final}
Jun 29, 2013 11:22:49 AM org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
Jun 29, 2013 11:22:49 AM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Jun 29, 2013 11:22:49 AM org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: hibernate.cfg.xml
Jun 29, 2013 11:22:49 AM org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: hibernate.cfg.xml
Jun 29, 2013 11:22:49 AM org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
Jun 29, 2013 11:22:50 AM org.hibernate.cfg.Configuration doConfigure
INFO: HHH000041: Configured SessionFactory: null
Jun 29, 2013 11:22:50 AM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000402: Using Hibernate built-in connection pool (not for production use!)
Jun 29, 2013 11:22:50 AM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000115: Hibernate connection pool size: 1
Jun 29, 2013 11:22:50 AM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000006: Autocommit mode: false
Jun 29, 2013 11:22:50 AM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/test]
Jun 29, 2013 11:22:50 AM org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000046: Connection properties: {user=user, password=****}
Jun 29, 2013 11:22:51 AM org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
Jun 29, 2013 11:22:52 AM org.hibernate.mapping.RootClass checkCompositeIdentifier
WARN: HHH000038: Composite-id class does not override equals(): PhonePK
Jun 29, 2013 11:22:52 AM org.hibernate.mapping.RootClass checkCompositeIdentifier
WARN: HHH000039: Composite-id class does not override hashCode(): PhonePK
Jun 29, 2013 11:22:52 AM org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService
INFO: HHH000399: Using default transaction strategy (direct JDBC transactions)
Jun 29, 2013 11:22:52 AM org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
Jun 29, 2013 11:22:52 AM org.hibernate.tool.hbm2ddl.SchemaExport execute
INFO: HHH000227: Running hbm2ddl schema export
Hibernate: alter table Phone drop foreign key FK_aoj0eivd0ap3drxnoyk4xj10q
Hibernate: drop table if exists Phone
Hibernate: drop table if exists Student
Hibernate: create table Phone (phoneNumber varchar(255) not null, color varchar(255), id integer not null, primary key (phoneNumber, id))
Hibernate: create table Student (id integer not null auto_increment, fName varchar(255), lName varchar(255), mname varchar(255), primary key (id))
Hibernate: alter table Phone add index FK_aoj0eivd0ap3drxnoyk4xj10q (id), add constraint FK_aoj0eivd0ap3drxnoyk4xj10q foreign key (id) references Student (id)
Jun 29, 2013 11:22:53 AM org.hibernate.tool.hbm2ddl.SchemaExport execute
INFO: HHH000230: Schema export complete
Hibernate: insert into Student (fName, lName, mname) values (?, ?, ?)
Hibernate: select phone_.phoneNumber, phone_.id, phone_.color as color2_0_ from Phone phone_ where phone_.phoneNumber=? and phone_.id=?
Hibernate: select phone_.phoneNumber, phone_.id, phone_.color as color2_0_ from Phone phone_ where phone_.phoneNumber=? and phone_.id=?
Hibernate: insert into Phone (color, phoneNumber, id) values (?, ?, ?)
Jun 29, 2013 11:22:53 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
WARN: SQL Error: 1048, SQLState: 23000
Jun 29, 2013 11:22:53 AM org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions
ERROR: Column 'id' cannot be null
org.hibernate.exception.ConstraintViolationException: could not execute statement
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:74)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:125)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:110)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:136)
at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:58)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3067)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3509)
at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:88)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:377)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:369)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:286)
at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:339)
at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52)
at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1234)
at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:404)
at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)
at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:175)
at Main.main(Main.java:48)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'id' cannot be null
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1041)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4187)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4119)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2570)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2731)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2815)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2458)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2375)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2359)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:133)
... 14 more
Jun 29, 2013 11:22:53 AM org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl release
INFO: HHH000010: On release of batch it still contained JDBC statements
