I have an entity [Network] which extends [Organisation]
In [Organisation] I have an array list of [Contacts].
When I try to to create a new contact and set the organisation to a [Network] I get an error saying
"IllegalStateException: Cannot get unfetched attribute [networkParticipantIdentifier]
from detached object com.daryn.entity.Network-966cefa5-bc6e-b0c9-e6f1-"
I don’t know why it needs to load the unfetched attributes anyway…
Actually I have figured it out from here:
https://doc.cuba-platform.com/manual-6.4/entity_extension.html
Entity extension is actually designed for extending entities belonging to application components. There is no need to use this mechanism for entities belonging to one project - use normal inheritance as described here.
Regarding your problem with the “Cannot get unfetched attribute” exception, please provide the source code of the entities and how you create/load them. Or better reproduce on a test project.