My Phone テーブルには、電話番号と ID の複合プライマリがあります。id は、Student テーブルへの外部キーでもあります。
実行すると、以下のエラーが表示されます。
23:30:28,228 エラー SqlExceptionHelper:147 -列 'id' を null に することはできません org.hibernate.exception.ConstraintViolationException: ステートメントを実行できませんでした
スキーマ:
表：学生
Columns:
id (PK)
fName
lName
mName
表: 電話
Columns:
phoneNumber (PK)
color
id(PK)(FK references to Student id)
学生.java
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;
}
}
電話.java
import java.io.Serializable;
import javax.persistence.Entity;
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 String id;
@Id
@ManyToOne
@JoinColumn(name = "id", insertable = false, updatable = false)
private Student student;
// public String getId() {
// return id;
// }
//
// public void setId(String id) {
// this.id = id;
// }
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;
}
}
PhonePK.java
import java.io.Serializable;
@SuppressWarnings("serial")
public class PhonePK implements Serializable {
private String phoneNumber;
//private String id;
private Student student;
// public String getId() {
// return id;
// }
//
// public void setId(String id) {
// this.id = id;
// }
/**
* @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;
}
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
PhonePK other = (PhonePK) obj;
if (phoneNumber == null) {
if (other.phoneNumber != null) {
return false;
}
} else if (!phoneNumber.equals(other.phoneNumber)) {
return false;
}
if (student == null) {
if (other.student != null) {
return false;
}
} else if (!student.equals(other.student)) {
return false;
}
// if (id == null) {
// if (other.id != null) {
// return false;
// }
// } else if (!id.equals(other.id)) {
// return false;
// }
return true;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((phoneNumber == null) ? 0 : phoneNumber.hashCode());
result = prime * result + ((student == null) ? 0 : student.hashCode());
// result = prime * result + ((id == null) ? 0 : id.hashCode());
return result;
}
}
hibernate.cfg.xml
<?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="hbm2ddl.auto">create</property>
</session-factory>
</hibernate-configuration>
Main.java
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();
System.out.println("Session Factory!!!!" + sessionFactory);
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();
}
}
}
コンソール出力:
23:30:24,291 INFO SchemaExport:343 - HHH000227: Running hbm2ddl schema export
23:30:24,296 DEBUG SQL:104 - alter table Phone drop foreign key
FK_aoj0eivd0ap3drxnoyk4xj10q
23:30:25,613 DEBUG SQL:104 - drop table if exists Phone
23:30:25,967 DEBUG SQL:104 - drop table if exists Student
23:30:26,230 DEBUG SQL:104 - create table Phone (phoneNumber varchar(255) not null,
color varchar(255), id integer not null, primary key (phoneNumber, id))
23:30:26,731 DEBUG SQL:104 - create table Student (id integer not null auto_increment,
fName varchar(255), lName varchar(255), mname varchar(255), primary key (id))
23:30:26,792 DEBUG SQL:104 - alter table Phone add index FK_aoj0eivd0ap3drxnoyk4xj10q
(id), add constraint FK_aoj0eivd0ap3drxnoyk4xj10q foreign key (id) references Student
(id)
23:30:27,352 INFO SchemaExport:405 - HHH000230: Schema export complete
Session Factory!!!!org.hibernate.internal.SessionFactoryImpl@548997d1
23:30:27,823 DEBUG SQL:104 - insert into Student (fName, lName, mname) values (?, ?, ?)
23:30:27,886 TRACE BasicBinder:84 - binding parameter [1] as [VARCHAR] - Bob
23:30:27,887 TRACE BasicBinder:84 - binding parameter [2] as [VARCHAR] - Buster
23:30:27,888 TRACE BasicBinder:72 - binding parameter [3] as [VARCHAR] - <null>
23:30:28,005 DEBUG SQL:104 - select phone_.phoneNumber, phone_.id, phone_.color as
color2_0_ from Phone phone_ where phone_.phoneNumber=? and phone_.id=?
23:30:28,009 TRACE BasicBinder:84 - binding parameter [1] as [VARCHAR] - 1111111111
23:30:28,010 TRACE BasicBinder:72 - binding parameter [2] as [INTEGER] - <null>
23:30:28,102 DEBUG SQL:104 - select phone_.phoneNumber, phone_.id, phone_.color as
color2_0_ from Phone phone_ where phone_.phoneNumber=? and phone_.id=?
23:30:28,103 TRACE BasicBinder:84 - binding parameter [1] as [VARCHAR] - 2222222222
23:30:28,104 TRACE BasicBinder:72 - binding parameter [2] as [INTEGER] - <null>
23:30:28,222 DEBUG SQL:104 - insert into Phone (color, phoneNumber, id) values (?, ?,
?)
23:30:28,223 TRACE BasicBinder:84 - binding parameter [1] as [VARCHAR] - Black
23:30:28,224 TRACE BasicBinder:84 - binding parameter [2] as [VARCHAR] - 1111111111
23:30:28,224 TRACE BasicBinder:72 - binding parameter [3] as [INTEGER] - <null>
23:30:28,227 WARN SqlExceptionHelper:145 - SQL Error: 1048, SQLState: 23000
23:30:28,228 ERROR SqlExceptionHelper:147 - 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:49)
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
23:30:28,323 INFO AbstractBatchImpl:195 - HHH000010:
On release of batch it still contained JDBC statements