JPA foreign key constraint with CascadeType.ALL

Question

I have 2 entities

That's first entity

public class Manager {

    // ...

    @OneToMany(mappedBy = "manager", cascade = CascadeType.ALL)
    @LazyCollection(LazyCollectionOption.FALSE)
    private List<ExpertAndRequest> requests;

    // ...

}

Second entity. This is the binding table of the two entities.

@Entity
@Data
@Table(name = "SOME_TABLE_NAME")
@IdClass(ExpertAndRequestId.class)
public class ExpertAndRequest implements Serializable {

    @Id
    private Long managerId;

    @Id
    private Long requestId;


    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "managerId", updatable = false, insertable = false, referencedColumnName = "id")
    private Manager manager;


    @ManyToOne
    @JoinColumn(name = "requestId", updatable = false, insertable = false, referencedColumnName = "id")
    private ParticipantRequest request;



}

So I delete the data from the table

this.managerRepository.delete(manager);        

And I get exception:

org.h2.jdbc.JdbcSQLException: Referential integrity constraint violation

What am I doing wrong?

---

EDIT :

I updated class above.

This is the IdClass

@Data
public class ExpertAndRequestId implements Serializable {

    private long managerId;
    private long requestId;


    public int hashCode() {
        return (int)(managerId + requestId);
    }

    public String toString() {

        return String.format("ExpertAndRequestId [expert = \"%s\", request=\"%s\"]", this.managerId, this.requestId);

    }

    public boolean equals(Object object) {
        if (object instanceof ExpertAndRequestId) {
            ExpertAndRequestId otherId = (ExpertAndRequestId) object;
            return (otherId.requestId == this.requestId) && (otherId.managerId == this.managerId);
        }
        return false;
    }

}

The third entity

public class ParticipantRequest {

    // ...

    @OneToMany(mappedBy = "request", cascade = CascadeType.ALL)
    @LazyCollection(LazyCollectionOption.FALSE)
    private List<ExpertAndRequest> experts;

    // ...

}

Example I took from https://en.wikibooks.org/wiki/Java_Persistence/ManyToMany

Answer 1

As you have a bidirectional relation between the Parent-Entity Manager and the Child-Entity ExpertAndRequest what you need is a CascadeType.REMOVE (or CascadeType.ALL, which includes REMOVE): You say to Hibernate "if the parent entity is removed please remove the child entity too". Take a llo here to understand how to use both CascadeType.REMOVE and orphanRemoval

Answer 2

尝试使用cascade = {CascadeType.PERSIST, CascadeType.MERGE}而不是cascade = CascadeType.ALL并以该站点为参考。