org.hibernate.LazyInitializationException en com.sun.faces.renderkit.html_basic.MenuRenderer.convertSelectManyValuesForModel
A pesar deFetchType.EAGER yJOIN FETCH, Yo tengo unLazyInitalizationException mientras agrega algunos objetos a un@ManyToMany colección a través de un JSFUISelectMany componente como en mi caso el<p:selectManyMenu>.
los@Entity IdentUser, conFetchType.EAGER:
@Column(name = "EMPLOYERS")
@ManyToMany(fetch = FetchType.EAGER, cascade= CascadeType.ALL)
@JoinTable(name = "USER_COMPANY", joinColumns = { @JoinColumn(name = "USER_ID") }, inverseJoinColumns = { @JoinColumn(name = "COMPANY_ID") })
private Set<Company> employers = new HashSet<Company>();
los@Entity Company, conFetchType.EAGER:
@ManyToMany(mappedBy="employers", fetch=FetchType.EAGER)
private List<IdentUser> employee;
El JPQL, conJOIN FETCH:
public List<IdentUser> getAllUsers() {
return this.em.createQuery("from IdentUser u LEFT JOIN FETCH u.employers WHERE u.enabled = 1 AND u.accountNonLocked=0 ").getResultList();
}
El JSFUISelectMany componente que causa la excepción al enviar:
<p:selectManyMenu value="#{bean.user.employers}" converter="#{entityConverter}">
<f:selectItems value="#{bean.companies}" var="company" itemValue="#{company}" itemLabel="#{company.name}"/>
</p:selectManyMenu>
La parte relevante del seguimiento de la pila:
org.hibernate.LazyInitializationException: failed to lazily initialize a collection, could not initialize proxy - no Session
at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:566)
at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:186)
at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:545)
at org.hibernate.collection.internal.PersistentSet.add(PersistentSet.java:206)
at com.sun.faces.renderkit.html_basic.MenuRenderer.convertSelectManyValuesForModel(MenuRenderer.java:382)
at com.sun.faces.renderkit.html_basic.MenuRenderer.convertSelectManyValue(MenuRenderer.java:129)
at com.sun.faces.renderkit.html_basic.MenuRenderer.getConvertedValue(MenuRenderer.java:315)
at org.primefaces.component.selectmanymenu.SelectManyMenuRenderer.getConvertedValue(SelectManyMenuRenderer.java:37)
...
¿Cómo se causa esto y cómo puedo resolverlo?