After upgrading from Hibernate 5.3 to Hibernate 6.2, when querying data using session.load , only the id field has a value and all other fields are null. What could be the possible reasons for this issue?
Hello, @Alan727
When you encounter an issue where only the id field has a value and all other fields are null after upgrading from Hibernate 5.3 to Hibernate 6.2, it could be due to several reasons:
Lazy Loading: Hibernate uses proxy objects for lazy loading by default. When you call session.load(), it returns a proxy, which only contains the identifier value. The other fields will be loaded from the database only when you access them.
Session Configuration: Check your session configuration. There might be changes in Hibernate 6.2 that affect how sessions are configured and how entities are loaded.
Mapping Issues: Ensure that your entity mappings are correctly configured. Any misconfiguration can lead to unexpected behavior when loading entities.
Enhancements in Hibernate 6.2: Hibernate 6.2 introduced several changes, including how ID generation and sequence strategies are handled. Make sure your ID generation strategy is compatible with the new version.
Dirty Checking: Hibernate 6.2 might have different defaults for dirty checking or read-only status for entities. Verify if entities are being loaded as read-only, which could prevent their fields from being initialized.
To troubleshoot this issue, you can:
Enable SQL logging to see the actual queries being executed.
Check the entity mappings and session configurations for any changes that need to be made due to the upgrade.
Review the Hibernate 6.2 migration guide for any breaking changes or deprecations that could affect your application.
I hope my suggestion is helpful to you.
Best Regard,
diana658h
You’re going to need to share more information if you want anyone to help you:
- what are you loading with
session.load()? - where are you seeing the
nullfields? - what do your mappings look like?