Hi all,
I got this problem and tried a lot but failed to solve. Ill straightforward...
I have two entity classes here are them
1. Caller.java (unwanted code removed)
Code:
@Entity
@Table(name="caller")
public class Caller implements Serializable{
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(name="caller_id")
private int callerId;
@OneToMany(cascade={javax.persistence.CascadeType.ALL}, mappedBy="caller", fetch=FetchType.EAGER)
private List<Passenger> passengers = new ArrayList<Passenger>();
public void setPassengers(List<Passenger> passengers) {
this.passengers = passengers;
}
public List<Passenger> getPassengers() {
return passengers;
}
}
2. Passenger.java
Code:
@Entity
@Table(name="passenger")
public class Passenger implements Serializable{
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(name="passenger_id")
private int passengerID;
@Column(name="p_caller_id")
private int callerID;
@ManyToOne(targetEntity=Caller.class, fetch=FetchType.LAZY, optional=false)
@JoinColumn(name="caller_id")
private Caller caller;
}
This is my ControllerServlet.java which retrieve data from html from and then save data.
I use Spring and Hibernate combination here.
Code:
Caller caller = new Caller();
Passenger passenger = null;
CallerDAOImpl callerDAOImpl = (CallerDAOImpl) factory.getBean("callerDao");
PassengerDAOImpl passengerDAOImpl = (PassengerDAOImpl) factory.getBean("passengerDao");
if(userAction.equals("add")){
ArrayList<Passenger> list = new ArrayList<Passenger>();
for(int i=1; i<=passengerCount; i++){
pFamilyName = request.getParameter("P_familyname_"+i);
if(!pFamilyName.equals("")){
passenger = new Passenger();
passenger.setFamilyname(pFamilyName);
passenger.setFirstname(request.getParameter("P_firstname_"+i));
passenger.setMobile(request.getParameter("P_mobile_"+i));
passenger.setRelation(request.getParameter("P_relation_"+i));
passenger.setType(request.getParameter("P_type_"+i));
list.add(passenger);
//passengerDAOImpl.addPassenger(passenger);
}
}
caller.setFirstname(firstName);
caller.setFamilyname(familyName);
caller.setStreet(street);
caller.setCity(city);
caller.setPostal(postal);
caller.setCountry(country);
caller.setPrimaryPhone(primaryPhone);
caller.setAlternatePhone(alternatePhone);
caller.setEmail(email);
caller.setAge(age);
caller.setNationality(nationality);
caller.setOtherInfo(otherInfo);
caller.setPassengers(list);
callerDAOImpl.addCaller(caller);
I do not post DAO class's code here, since there are no any problem with them.
Here is the error which received when I try to save data. Sole Caller object is saved, but after assigned relationship to the classes, this goes wrong.
here is the error
Code:
org.hibernate.PropertyValueException: not-null property references a null or transient value: com.trn.Passenger.caller
please help me,
regards,
dila.
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