[JPA, eclipselink]OneToMany Relationship not working

[Jhon Gonzales]

Hello, i have a problem with an OneToMany relationship. I try to get the List but it does not return anything. Theses are my sources:


This the Main:

public class ModelTest {

    /**
     * @param args
     */
    public static void main(String[] args) {
       
       //Creating 
       {
           StudyEntity st = new StudyEntity();       
           st.setPatientName("Edwin");
           st.setStudy_pk("111");         
           new StudyCRUD().create(st);
           
           
           StudyEntity st2 = new StudyEntity();
           st2.setPatientName("Jose");
           st2.setStudy_pk("2333");
           new StudyCRUD().create(st2); // Persist the object in DB
           
           
           SeriesEntity se = new SeriesEntity();
           se.setStudyentity(st);
           new SeriesCRUD().create(se);
           
           
           SeriesEntity se2 = new SeriesEntity();
           se2.setStudyentity(st);
           new SeriesCRUD().create(se2); // Persist the object in DB
       }
       
       //Retrieving
       {
           StudyEntity study = new SeriesCRUD().getStudyEntityByID(1); // Get a Object by ID
           System.out.println("Name: "+study.getPatientName());
           System.out.println("Size: "+study.getStudySeries().size());
       }
       
       
       

    }

}

Result:

Name: Edwin
Size: 0

Tables info:
studyentity ida, DELETED, MODALITY, PATIENTNAME, SENT, STUDY_DATETIME, STUDY_ID, STUDY_PK 1, 0, '', 'Edwin', 0, '', '', '111' 2, 0, '', 'Jose', 0, '', '', '2333' seriesentity ID, SERIES_IUID, SERIES_PK, ida 1, '', '', 1 2, '', '', 1

The entities tables:

@Entity @Table(name="studyentity")
public class StudyEntity implements Serializable{
    
    @Id @GeneratedValue(strategy=GenerationType.IDENTITY) @Column(name="ida")
    private long id;
    
    private String patientName;
    private String study_id;
    
    private String modality;
    
    @Column(unique=true )
    private String study_pk;
    
    @Temporal(javax.persistence.TemporalType.TIMESTAMP)
    private Date study_datetime;
    
    private boolean sent;
    
    @Column(columnDefinition="boolean default false")
    private boolean deleted;
    
    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY,mappedBy="studyentity")
    private List<SeriesEntity> studySeries;
    
//getters and setters

@Entity @Table(name="seriesentity")
public class SeriesEntity implements Serializable {


    private static final long serialVersionUID = 1L;
    
    @Id @GeneratedValue(strategy=GenerationType.IDENTITY)
    private Long id;
    
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "ida", nullable = false)    
    private StudyEntity studyentity;
    
    private String series_pk;
    
    private String series_iuid;
   
//Getters and Setters