11 | Adding multi part path index on non-embedable object member { @MapsId @ManyToOne(fetch = FetchType.LAZY) private Merchant merchant; @MapsId @ManyToOne(fetch = FetchType.LAZY) private List<Store> stores; // Setter/Getter |
11 | Extra uninitialised entities spawned on merge()In the following, Element is a base entity class, with a bi-directional @ManyToOne-@OneToMany relationship Element owner - List<Element> ownedElements, and Example is a subclass entity ... ) { this.id = id; } private Element owner; @ManyToOne() public |
11 | @JoinColumn(nullable=false)? This is an code example: //bi-directional many-to-one association to AlarmGroup @ManyToOne @JoinColumn ... . But you can use the optional element of the @ManyToOne and @OneToOne annotations. Similarly, see this forum |
11 | Merge Issue: Attempt to reuse an existing primary key value; import org.junit.Test; import java.util.*; import javax.persistence.ManyToOne; public ... = this; } } @Entity static class B { @ManyToOne(fetch = FetchType.LAZY, cascade = { CascadeType |
7 | How to avoid NULL values on Embedded entities; @ManyToOne private Cliente cliente; //Opcional @Basic(optional=false) private Date fechaYhora; //Fecha en |
7 | _PersistenceException: Type is not found on getSingleResult.; @ManyToOne private Municipio lugarNacimiento; @OneToMany(mappedBy = "estudiante |
7 | Problem persisting a TreeSet fieldHello, I am getting a "java.lang.IllegalArgumentException: Can not set java.util.TreeSet field Message.children to java.util.HashSet" when persisting a Message object with a parent/children relationship: @ManyToOne private Message parent; @OneToMany(mappedBy = "parent") private TreeSet |
7 | Memory use in OneToMany relationshipsHello everyone, I have a question regarding the OneToMany / ManyToOne Relationship in ObjectDB. So imaging following setup: We have class A which holds an collection (List, Arrray ...) of class B. In a more usual DB like MySQL with a seperate server we first query for the Entitys of class |
7 | Problem with distinct select, order by and equivalent alias/attribute path = GenerationType.AUTO) private Long id; private String name; @ManyToOne |
2 | New entity objects are duplicated on merge cascading @GeneratedValue long id; @ManyToOne(fetch= FetchType.LAZY) A owner ... static class C { @Id @GeneratedValue long id; @ManyToOne(fetch= FetchType.LAZY |
