Hallo,

beim deployen werden/wird die Tabelle in der Datenbank nicht automatisch gedropped und created, obwohl ich es als property angegeben habe.

Meine Persitence.xml sieht folgender massen aus:

Code :

1 2 3 4 5 6 7 8 9 10

<?xml version="1.0" encoding="UTF-8"?> <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">   <persistence-unit name="KeyGenPU" transaction-type="JTA">     <provider>oracle.toplink.essentials.PersistenceProvider</provider>     <jta-data-source>jdbc/sample</jta-data-source>     <properties>       <property name="toplink.ddl-generation" value="drop-and-create-tables"/>     </properties>   </persistence-unit> </persistence>

Meine Entity Klasse so:

Code :

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

@Entity @Table(name = "NEWENTITY") @NamedQueries({@NamedQuery(name = "Newentity.findById", query = "SELECT n FROM Newentity n WHERE n.id = :id"), @NamedQuery(name = "Newentity.findByFirstname", query = "SELECT n FROM Newentity n WHERE n.firstname = :firstname")}) public class Newentity implements Serializable {     private static final long serialVersionUID = 1L;     @Id     @GeneratedValue(strategy=GenerationType.IDENTITY)     @Column(name = "ID", nullable = false)     private Long id;     @Column(name = "FIRSTNAME")     private String firstname;       public Newentity() {     }       public Newentity(Long id) {         this.id = id;     }       public Long getId() {         return id;     }       public void setId(Long id) {         this.id = id;     }       public String getFirstname() {         return firstname;     }       public void setFirstname(String firstname) {         this.firstname = firstname;     } }

Ich verwende:

- Netbeans 6
- Derby
- Toplink

Wäre nett, wenn mir jemand dieses Verhalten erklären könnte.