Cannot get unfetched attribute ... but attribute is included in view ?

Support
#1

Hi, I am getting an unfetched attribute error, but as far as I understand the attribute is included in the view.
I have no idea what’s going wrong.

The error happens when accessing the “ConcertUnit” attribute of “Concert” entity, from the ConcertPerson edit screen.

Steps to reproduce:

  • From TOJM menu, open Concerts
  • Select sample concert and click “Manage Persons” button. (Performers tab opens)
  • In Performers tab, click add
  • In the dialog window, select a person from the lookupField under “Person”.

Here is the error:
IllegalStateException: Cannot get unfetched attribute [concertUnit] from detached object com.company.tojm.entity.Concert-a86d834a-b5c6-e71b-1839-a9537c3b0f48 [detached].

However, the view used (“concertPersonWithC_CU-view”) contains both “Concert” and “ConcertUnit”…
What am I missing?

Attached please find the project. Thanks for any help!


java.lang.IllegalStateException: Cannot get unfetched attribute [concertUnit] from detached object com.company.tojm.entity.Concert-a86d834a-b5c6-e71b-1839-a9537c3b0f48 [detached].
	at org.eclipse.persistence.internal.queries.EntityFetchGroup.onUnfetchedAttribute(EntityFetchGroup.java:98)
	at com.haulmont.cuba.core.sys.persistence.CubaEntityFetchGroup.onUnfetchedAttribute(CubaEntityFetchGroup.java:61)
	at org.eclipse.persistence.internal.jpa.EntityManagerImpl.processUnfetchedAttribute(EntityManagerImpl.java:2846)
	at com.haulmont.chile.core.model.impl.AbstractInstance._persistence_checkFetched(AbstractInstance.java)
	at com.company.tojm.entity.Concert._persistence_get_concertUnit(Concert.java)
	at com.company.tojm.entity.Concert.getConcertUnit(Concert.java:305)
	at com.company.tojm.web.concertperson.ConcertPersonEdit.lambda$init$1(ConcertPersonEdit.java:67)
	at com.haulmont.bali.events.EventRouter.fireEvent(EventRouter.java:45)
	at com.haulmont.cuba.web.gui.components.WebLookupField.lambda$attachListener$4850968e$1(WebLookupField.java:203)
	at sun.reflect.GeneratedMethodAccessor117.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:510)
	at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:200)
	at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:163)
	at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:1037)
	at com.vaadin.ui.AbstractField.fireValueChange(AbstractField.java:1181)
	at com.vaadin.ui.AbstractField.setValue(AbstractField.java:580)
	at com.vaadin.ui.AbstractSelect.setValue(AbstractSelect.java:742)
	at com.vaadin.ui.AbstractField.setValue(AbstractField.java:474)
	at com.vaadin.ui.ComboBox.changeVariables(ComboBox.java:750)
	at com.haulmont.cuba.web.toolkit.ui.CubaComboBox.changeVariables(CubaComboBox.java:162)

tojm_sample.zip (2.5M)

1 Like
#2

Hi Matthis,

Thank you for your sample project. We have looked at it.

The “tojm$ConcertWithCp.edit” screen is opened with the view which does not contain a link to “ConcertUnit”.
To solve the problem add the “concertUnit” attribute to the “concertWithCP” view.

Let me explain the reason:

In your project, “Concert” is a composition of “ConcertPersons”. Composition entities should be persisted together, and the platform does not reload “Detail” entity when its editor is opened from “Master” editor.

“ConcertUnit” edit-screen is opened from the “Concert” edit-screen.

So “ConcertPersons” edit-screen receives all data from the parent screen (where the “concertUnit” attribute is unfetched).

Regards.

#3

Hi Rotislav,

Thank you very much for taking the time to look at the uploaded project.

Understood that the platform does not reload “Detail” entity when editor is opened from “Master” editor - now that it makes sense it is easy to fix! Solved.

Thanks again for your clear explanation.
Best regards,

Matthis