[FIXED] Order By child field in One To One relationship Spring Data Jpa

Issue

I have a one to one relationship like this:

@Entity
public class Modification {
    
    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="modification_id")
    Long id;
    
    @Column(name="second_line", length=1000)
    String firstLine;
    
    @OneToOne
    @JoinColumn(name="tm_satus")
    StatusOrder tmStatus;
    
    // Constructors getters and setters
}

@Entity
public class StatusOrder {
    
    @Id
    @Column(name="status")
    int status;
    @Column(name="status_order")
    int order;
    // Constructors getters and setters
}

So every Modification has a StatusOrder.

Now I want to perform a query where I select from Modification table ordered by order field in StatusOrder.

Is there a way to have a method in my repository like:

Page<Modification> findAllOrderByStatusOrder(Pageable pageable);

Solution

Try these,

@Query("SELECT m FROM Modiciation m ORDER BY m.tmStatus.order DESC")
Page<Modification> findAllOrderByStatusOrder(Pageable pageable);

or (I don't know if this'll work.)

Page<Modification> findAllOrderBytmStatus_orderDesc(Pageable pageable);

Answered By - Candoğuş Yılmaz
Answer Checked By - Dawn Plyler (JavaFixing Volunteer)