Question

I have problems creating a custom query.

This is what entities:

@Entity
public class ApplicationProcess {

    @CollectionOfElements
    private Set<Template> defaultTemplates;
    //more fields
}

And Template.java

@Embeddable
@EqualsAndHashCode(exclude={"used"})
public class Template implements Comparable<Template> {

 @Setter private ApplicationProcess applicationProcess;
 @Setter private Boolean used = Boolean.valueOf(false);

 public Template() {
 }

 @Parent
 public ApplicationProcess getApplicationProcess() {
   return applicationProcess;
 }

 @Column(nullable = false)
 @NotNull
 public String getName() {
   return name;
 }

 @Column(nullable = true)
 public Boolean isUsed() {
   return used;
 }

 public int compareTo(Template o) {
   return getName().compareTo(o.getName());
 }
}

I want to create a update statement. I have tried these two:

int v = entityManager.createQuery("update ApplicationProcess_defaultTemplates t set t.used = true " + "WHERE t.applicationProcess.id=:apId").setParameter("apId", ap.getId())
   .executeUpdate();

ApplicationProcess_defaultTemplates is not mapped [update ApplicationProcess_defaultTemplates t set t.used = true WHERE t.applicationProcess.id=:apId]

And I have tried

 int v = entityManager.createQuery("update Template t set t.used = true " + "WHERE t.applicationProcess.id=:apId").setParameter("apId", ap.getId())
   .executeUpdate();

With the same error:

Template is not mapped [update Template t set t.used = true WHERE t.applicationProcess.id=:apId]

Any ideas?

UPDATE

I fixed it by creating native query

int v = entityManager.createNativeQuery("update ApplicationProcess_defaultTemplates t set t.used=true where t.ApplicationProcess_id=:apId").setParameter("apId", ap.getId()).executeUpdate();

Answer 1

What you want to do is not possible in hql : as embedded objects are not entities, they cannot appear in the from clause of hql queries. And to do an update of that object you need it to be in the from clause.

So you have two possibilities :

• Either use a sql query (be careful to know the (lack of) impact of sql update on the current session entities)
• refactor your Template class to an entity