identifier of an instance of ...was altered from - spring-boot

Question

i found many response about this title "identifier of an instance of ...was altered from ..." but none of this give me a solution.
i am using PostgreSQL
with just 2 column id_type and libelle.
here is my Model level :
package com.stev.pillecons.pilleCons.models;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
#Entity(name = "type_pille")
#JsonIgnoreProperties({"hibernateLazyInitializer","handler"})
public class LePille {
#Id
#GeneratedValue (strategy = GenerationType.IDENTITY)
private int id_type;
private String libelle;
public LePille(){}
public String getLibelle() {
return libelle;
}
public void setLibelle(String libelle) {
this.libelle = libelle;
}
public int getId_type() {
return id_type;
}
public void setId_type(int id_type) {
this.id_type = id_type;
}
}
My Service level :
#Override
public LePille updatePille(Integer id, LePille Sourcepille) {
Optional<LePille> existingSession = pilleRepo.findById(id);
if (existingSession.isPresent())
{
LePille Targetpile = existingSession.get();
BeanUtils.copyProperties(Sourcepille, Targetpile);
return pilleRepo.saveAndFlush(Targetpile);
}
else
{
throw new PilleException("pille not found");
}
}
when i debug it, with the data
{"id_type":10,"libelle":"dsf"}
with postman
the value of TargetPille is : {"id_type":10,"libelle":"dsf"}
and the value of SourcePille : {"id_type":0,"libelle":"popo"}
last but not least is Controller level:
#RequestMapping(value = "{id}", method = RequestMethod.PUT)
public ResponseEntity update(#PathVariable Integer id, #RequestBody LePille session) {
LePille updPille = pilleService.updatePille(id, session);
return new ResponseEntity<LePille>(updPille, HttpStatus.OK);
}
it is strange because juste update that not working, Create, Read and Delete works fine.
thanks in advance

Answer 1

i just change the code like this:
BeanUtils.copyProperties(Sourcepille, Targetpile, "id_type");
just add the id_type to ignore variable