Hibernate, Spring Data, insert id of table parent on table child - mysql

Question

I'm trying insert the id of Person in child table 'Contact'. But the Hibernate stores the value null at fk column.
I perform the mapping of a DTO to the entity, where it already brings the person's data and contact. In the end I have to save the person entity.
There is a table inheritance!
Parent table:
#Entity
#Table
#Inheritance(strategy = InheritanceType.JOINED)
#DiscriminatorColumn(name = "type", discriminatorType = DiscriminatorType.STRING, columnDefinition = "CHAR(2)", length = 2)
public abstract class Person implements Serializable {
#OneToMany(fetch = FetchType.EAGER, mappedBy = "person")
#Cascade(value={org.hibernate.annotations.CascadeType.ALL})
private #Getter #Setter Set<Contact> contacts;
}
Table Company extends of Person:
#Entity
#Table
#DiscriminatorValue(value="PJ")
public class Company extends Person implements Serializable {
#Column(nullable = false, columnDefinition = "DATE")
private #Getter #Setter LocalDate constitutionDate;
}
And where is the problem!
#Entity
#Table(name = "contact")
#EqualsAndHashCode
public class Contact implements Serializable {
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private #Getter Integer id;
#Column(columnDefinition = "VARCHAR(16)", length = 16, nullable = false)
private #Getter #Setter String phoneNumber;
#ManyToOne(fetch = FetchType.LAZY, optional = false,targetEntity=Person.class)
#JoinColumn(name = "person_id", nullable = false, referencedColumnName="id")
private #Getter #Setter Person person;
public Contact() {}
public Contact(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
}
What am I doing wrong? What's the best strategy?
Excuse me for my poor English!

Answer 1

Can't find nothing obvious that's wrong but let me try some things:
Your cascade annotation on Person class doesn't need the specific Hibernate enumeration You can use like :
#OneToMany(fetch = FetchType.LAZY, cascade = { CascadeType.ALL }, mappedBy = "cliente")
In your ManyToOne annotation on Contact class please try to add:
#ManyToOne(cascade = { CascadeType.PERSIST, CascadeType.MERGE })
BTW, an inheritance relationship between Person and Company doesn't seem logic to me, but that has nothing to do with your stated problem for sure.