Hello everybody,

I use the hbm2ddl.auto property in my hibernate configuration in order to create a table automatically but unfortunately it doesn´t work.

here is my hibernate configuration:

<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>
<property name="hibernate.connection.password">Mira</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/adressdb</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
<property name="cache.provider.class">org.hibernate.cache.EhCacheProvider</property>
<property name="current_session_context_class">thread</property>
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
<property name="hbm2ddl.auto">create</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.format_sql">true</property>
<mapping class="domain.Contact"/>
</session-factory>
</hibernate-configuration>

and here is my mapping class:

@Entity
public class Contact implements Serializable {

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private String id;
private String name;
private String address;
private String city;
private String state;
private String zipCode;
private String phoneNumber;
private String relationship;

public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
...

When I try to insert a new Contact into the database I get the following error:

Hibernate:
insert
into
Contact
(address, city, name, phoneNumber, relationship, state, zipCode)
values
(?, ?, ?, ?, ?, ?, ?)
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not insert: [domain.Contact]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2186)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2666)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:321)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:562)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:550)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:546)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:342)
at $Proxy6.save(Unknown Source)
at dao.ContactDAOImpl.addContact(ContactDAOImpl.java:53)
at dao.ContactDAOImpl.main(ContactDAOImpl.java:98)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'adressdb.contact' doesn't exist
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.Util.getInstance(Util.java:381)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3558)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3490)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2648)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2077)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2362)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2280)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2265)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:94)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:57)
... 23 more


This error occurres because the table Contact was not created automatically into my Database. But why? I use
<property name="hbm2ddl.auto">create</property>
in my hibernate config file? Anyone see what I´m doing wrong?

You probably have also to define



in order that hibernate scans for annotated classes.
N.B.: Obviously your annotated classes must also be in your java classpath

unfortunately the additional
<property name="hibernate.archive.autodetection">class</property>

don´t solve the problem. The annotated class Contact is in my java classpath. Any other ideas?

Enable



in your log4j.properties configuration file and check if a line like is logged:


If not , then definitely AnnotationConfiguration does not recognize domain.Contact as persistent class.

o.k. now it works! I found the error with a more detailed log output:

11:54:04,543 INFO SchemaExport:251 - exporting generated schema to database
11:54:04,558 ERROR SchemaExport:348 - Unsuccessful: create table Contact (id varchar(255) not null auto_increment, address varchar(255), city varchar(255), name varchar(255), phoneNumber varchar(255), relationship varchar(255), state varchar(255), zipCode varchar(255), user_id integer, primary key (id))
11:54:04,558 ERROR SchemaExport:349 - Incorrect column specifier for column 'id'

The problem was that I had the wrong type for the Id because I use a Generator. I changed the type of the id attribute from String to int and now it works.

Thank you very much!