CODEWITHSUNDEEP
javaspringspring-data-jpaspring-data
Xenox332
Xenox332

Reputation: 19

How to link a relationship in spring data without cascading data

I am using spring data and have two entities with a OneToMany and ManyToOne relationship between eachother respectively. I want the relationship to function simply as a foreign key reference and nothing more however when I save contact data it also saves all data under Person and its relations which I do not want. I just want it to link the person entity to the contact entity and nothing more. I tried many things including different Cascade types and removing cascade alltogether.

@Entity
@Table(name = "person")
public class Person {

    @Id
    @GeneratedValue
    public UUID person_id;


    @OneToMany(mappedBy = "person")
    public List<Contact> contacts;

    ...etc

}

@Entity
@Table(name = "contact")
public class Contact {

    @Id
    @GeneratedValue
    public UUID contact_id;

    @ManyToOne
    @JoinColumn(name = "person_id")
    public Person person;

    ...etc

}

Upvotes: 1

Views: 789

Answers (2)

wtsiamruk
wtsiamruk

Reputation: 339

If you want to remove all cascading, just use CascadeType.

https://www.baeldung.com/jpa-cascade-types

Upvotes: 1

Nguyen Tuan Anh
Nguyen Tuan Anh

Reputation: 1036

When you save a contact data for a specific person record, that person record must already exist if you declare the domain objects as described in your question. So you are going to do like:

Person person = personRepository.findOne(personId);
contact.setPerson(person);
contactRepository.save(contact);

This simply creates a relationship (a foreign key), and adds the primary key of the specified person to the newly created contact record. Nothing is changed in the person record.

Upvotes: 0

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