Problem persisting after finding

Question

Hi everybody sorry about my english i have an issue that if driving me mad
I'm making an GUI to manage cities i got a jtable that shows all the cities that the user may update and a jbutton that initialize all field to insert a new one
If i click on a city (use find of tha jpacontroller) and then click on the button ( make a persist), insert the new one and update the previous with the data of the new!!!
Here is the code:
//NEW button reset fields
private void botonNuevoActionPerformed(java.awt.event.ActionEvent evt) {                                          
tfCodigoPostal.setText("");
tfNombre.setText("");
tfCodigoPostal.requestFocus();
ciudadActual=null; //Object that manage the actual city to update or insert is of class Ciudad (city in spanish)
//Mouse releade method of the table
private void jTableCiudadesMouseReleased(java.awt.event.MouseEvent evt) {                                     
controladorCiudad= new CiudadJpaController(); //JPA controller
Integer fila=jTableCiudades.getSelectedRow();
Integer valorCelda = Integer.parseInt(jTableCiudades.getValueAt(fila,0).toString());
controladorCiudad=null;
jLabel3.setText(fila.toString());
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                        
if (ciudadActual==null) {ciudadActual=new Ciudad();                                                     //if is null is a new city, make a new one and load the data if not only load data
                ciudadActual.setCodPostal(Integer.parseInt(tfCodigoPostal.getText().toString()));
                ciudadActual.setNombre(tfNombre.getText().toString());
try{
entityManager1.getTransaction().begin();
if (ciudadActual.getIdCiudad()==null) //if there is no id then is a new one use persis else use merge
entityManager1.persist(ciudadActual);
else entityManager1.merge(ciudadActual);
entityManager1.flush();
entityManager1.getTransaction().commit();
listaCiudades.clear();
listaCiudades.addAll(queryCiudades.getResultList());
} catch(Exception e) {
System.out.print(e.toString());
JOptionPane.showMessageDialog(null,
"No se pudo ingresar el registro:" + e.getMessage(),
"Error de ingreso",
JOptionPane.ERROR_MESSAGE);
entityManager1.getTransaction().rollback();
return;
JOptionPane.showMessageDialog(null,
"Valores ingresados con exito",
"Actualizacion exitosa",JOptionPane.INFORMATION_MESSAGE);
If i click in a exiting city of the table then insert a new one 2 modifications to the database is made (insert the new city and update the one that clicked with the new data)
and help will be apreciated
thanks in advance

Answer 1

It sounds like you are modifying an existing city object, instead of a new one. Ensure that you create a new city object and do not modify an existing one from the UI.
If still stuck, perhaps include the full source to this class, where is ciudadActual used and where is it being modified. Sounds like the UI is directly modifying this object.
James : http://www.eclipse.org/eclipselink/