I have configured Hibernate Envers in my Springboot project and now it is saving each change in the entities I annotated with @Audited but, I have a doubt.
Envers stores the revision of the entity after the first change is done so, after one change I have the new values stored in the entity table and in the _AUD table. The next changes are stored in the _AUD table so I know what changed after the first update but the original values (the ones before the first change) are lost. Am I missing something? Is there a way to save the values before the change is done (as I already have the last values in the entity table)?.
There are three different revision types tracked by Envers:
This implies that if the entries are being inserted, updated, and deleted by Hibernate through a stateful session, Envers will pickup those changes and add the appropriate REVTYPE entry to the audit table.
If an entry is being manipulated outside of the scope of Hibernate's stateful session, Envers won't know about that change and the corresponding entry won't be added to the audit table. Based on the comments, this is why you don't see a REVTYPE=0 (aka INSERT) operation.
For situations like this, you'll need to make sure that you increment the revision number sequence and add the appropriate entries manually through your script or batch process that is inserting the row in order to guarantee that the Envers schema has the complete visibility to the entity's history.