mapping list source to target - spring-boot

Question

I have an object organization that contains a contact objects list.
The conacts list exists already in the database.
To test with postman, when i need to add an organization i have to add the list of contacts id
{
"name": "ce",
"contactsId": [1, 3]
}
In the contact class i have
#ManyToMany(cascade = CascadeType.ALL)
#JoinTable(name = "contact_organization", joinColumns = #JoinColumn(name = "contacts_id", referencedColumnName = "id"), inverseJoinColumns = #JoinColumn(name = "organizations_id", referencedColumnName = "id"))
private Set<Organization> organizations = new HashSet<>();
In the Organization class i have
#ManyToMany(mappedBy = "organizations")
private Set<Contact> contacts = new HashSet<>();
and in the organisationDTO class i have
private Set<Long> contactsId = new HashSet<>();
In the mapping class i did the mapping this way but it doesn't seem to be working
#Mapper(componentModel = "spring", uses = { ContactMapper.class }))
public interface OrganizationMapper extends EntityMapper<OrganizationDTO, Organization> {
#Mapping(source = "contacts", target = "contactsId")
OrganizationDTO toDto(Organization organization);
#Mapping(source = "contactsId", target = "contacts")
Organization toEntity(OrganizationDTO organizationDTO);
default Organization fromId(Long id) {
if (id == null) {
return null;
}
Organization organization = new Organization();
organization.setId(id);
return organization;
}
default Long fromContact(Contact contact) {
return contact == null ? null : contact.getId();
}
}
#Mapper(componentModel = "spring", uses = { OrganizationMapper.class })
public interface ContactMapper extends EntityMapper<ContactDTO, Contact> {
ContactDTO toDto(Contact contact);
Contact toEntity(ContactDTO contactDTO);
default Contact fromId(Long id) {
if (id == null) {
return null;
}
Contact contact = new Contact();
contact.setId(id);
return contact;
}
}
the problem here it shows me the id and the label is null, and in the data base it adds the organization but does not add the contacts
Organization organization = organizationMapper.toEntity(organizationDTO);
for(Contact item : organization.getContacts()) {
log.info("******************************************" + item.getId());
log.info("++++++++++++++++++++++++++++++++++++++++++" + item.getLabel());
}
organization = organizationRepository.save(organization);

Answer 1

This currently is not supported. You are trying to map a property id from the list contacts into the contactsId list.
In order to achieve what you are looking forward you need to provide a way of mapping from Contact to Long.
Your mapper can look like:
#Mapper
public interface MyMapper {
#Mapping(source = "contacts", target = "contactsId")
OrganizationDTO toDto(Organization organization);
default Long fromContact(Contact contact) {
return contact == null ? null : contact.getId();
}
}