18 | Merge Issue: Attempt to reuse an existing primary key value private String name; @ManyToMany(cascade = { CascadeType ... children ? ( without retrieving child on Db or using other tricks ). Thanks, Xirt Edit : Using CascadeType.MERGE make the test case working ! I think the CascadeType.PERSIST ( included in CascadeType |
14 | Performance in large transactions; import javax.persistence.CascadeType; import javax.persistence.ElementCollection; import javax ... = CascadeType.ALL) private List<MyEntityElement> list = new ArrayList<>(); public List<MyEntityElement ... (cascade = CascadeType.ALL, mappedBy = "ownerEntity") private List<MyEntityElement> list |
14 | Is it possible to remove parent/child entities without refresh?.persistence.CascadeType; import javax.persistence.Column; import javax.persistence.Entity ... private long id; @OneToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy ... = { CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH }) private ParentEntity parent |
14 | Merge with Parent/Child entities not possible java.util.Map; import javax.persistence.CascadeType; import javax.persistence.Column; import ... = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "parent", orphanRemoval = true) @MapKey ... long id; @ManyToOne(fetch = FetchType.LAZY, cascade = { CascadeType.PERSIST, CascadeType.MERGE |
14 | EntityManager JPA or JDO impl and different behavior; } @OneToMany(cascade=CascadeType.PERSIST, fetch=FetchType.EAGER) public List ... ; displayValues.put("en", name); } @OneToMany(cascade=CascadeType ... have cascade=CascadeType.ALL on a OneToMany map, then the cascade ONLY applies to the values, NOT to the key |
13 | EM.find() is suddenly slower = FetchType.EAGER, cascade = {CascadeType.REFRESH, CascadeType.DETACH }) private ModelElementImpl element; @OneToMany (fetch = FetchType.EAGER, cascade = {CascadeType.REFRESH, CascadeType.DETACH |
13 | Embedded Entity in EmbeddedId not persisted. Error 631 at select. CascadeType.PERSIST: @Embeddable public static class AId { @OneToOne(cascade = CascadeType.PERSIST) public B b; Apparently the @Embedded annotation works as CascadeType.PERSIST, although B is an entity class, not embeddable class, so CascadeType.PERSIST is the right annotation to use. support Support |
3 | Tracking changes to new collections (in enhancement mode) after flush, cascade = {CascadeType.REFRESH, CascadeType.DETACH }) private ModelElementImpl element; @OneToMany (fetch = FetchType.EAGER, cascade = {CascadeType.REFRESH, CascadeType.DETACH }) private ... , cascade = {CascadeType.REFRESH, CascadeType.DETACH }) private ModelElementImpl element |
2 | Best practise loading big data javax.persistence.CascadeType; import javax.persistence.ElementCollection; import javax.persistence ... ; @OneToMany (cascade = CascadeType.ALL, targetEntity = MyStepBlock.class, fetch = FetchType.LAZY ... { @OneToMany (cascade = CascadeType.ALL, targetEntity = MyStep.class, fetch = FetchType |
2 | After using the enhancer, Lazy loaded collections are no longer loading. They are set as null(Long id) { this.id = id; } @OneToMany(cascade={CascadeType.MERGE, CascadeType.PERSIST}, mappedBy="account", fetch = FetchType.LAZY) @JoinColumn(name = "project_id", unique ... ; @OneToMany(cascade={CascadeType.MERGE, CascadeType.PERSIST}, mappedBy="account", fetch |
