I am in the process of cleaning a database. These process involves changing the format of certain fields and getting rid of some data integrity issues.
I developed a program with Spring Data 1.1 to process the records in batches. The problem arises with 2 entities in a @OneToOne relationship. The record for Entity B does not exist although Entity A has a reference to it. My job is to clear the reference to Entity B if that is the case.
The question is: should I pre-process the data to clean this or can I adjust Spring Data or JPA settings to put null in the field if the Entity is not found?
It is “normal” – with this data – to have a FK in Entity A that does not exist in Entity B, so I want to handle this in my code and not have to pre-process the data with an additional step or other tool. The data will be arriving in batches so any pre-processing makes things more complicated for the user.
In summary, I want Spring Data to set the field to null and continue the process instead of getting an org.springframework.orm.jpa.JpaObjectRetrievalFailureException: Unable to find....
Perhaps you are looking for the @NotFound annotation?
Here is a post that talks about it.