Hi Enrique,
As far as I remember, that is not the default behaviour. I've checked the spec,
section 3.2.2 Persisting an Entity Instance and my understanding is that the
persist operation is only applied by explicitly calling persist on the object,
or via a cascade.
I'm not familiar with how Spring Boot sets up the PU, but there is a
configuration, cascade-persist, that you can apply to all mappings, Maybe
Spring Boot does it under the covers. Do you have an orm.xml configuration file?
Cheers,Roberto
From: Enrique Rodríguez Lasterra <[email protected]>
To: [email protected]; Roberto Cortez <[email protected]>
Sent: Thursday, August 4, 2016 2:20 AM
Subject: Re: Migration from hibernate
Maybe is a configuration of springboot...i load hibernate with spring..but when
i execute my example, when i do entitmanager.persist(customer), hibernate first
execute a select of customertype table and them the insert of customer table.
I was thinking that JPA first try to find on the database if the PrimaryKey of
the child object exists....but it seems openjpa don't do it.
Regards.
2016-08-03 22:24 GMT+02:00 Roberto Cortez <[email protected]>:
Hi Enrique,
Strange. I was almost certain that Hibernate would work that way as well. If
just leave the defaults one, the EntityManager doesn't know what to do with a
detached entity instance.
I've tried with one sample project and this is what I get with
Hibernate:org.hibernate. TransientPropertyValueExceptio n: object references an
unsaved transient instance
If I add the Cascade then it works fine.
Maybe you have Cascade set up somewhere else?
Cheers,Roberto
From: Enrique Rodríguez Lasterra <[email protected]>
To: [email protected]
Sent: Wednesday, August 3, 2016 5:29 AM
Subject: Migration from hibernate
Hi, i'm new on the list. I'm migrating a project from tomcat+hibernate to
websphere+openjpa2.2.3
My problem is with a @ManyToOne relationship.
I have a Customer entity with a relationship with CustomerType.
When i create a new customer i don't whant to save-update customertype.
This pseudo-code work with hibernate
Customer c = new Customer();
CustomerType ct = new CustomerType();
ct.setPk(1);
c.setCustomerType(ct);
....
entityManager.persist(c);
When i execute it with openjpa, i get an exception that CustomerType is
detached and i shoud user Cascade.Persist, but this is not what i want.
I know that one way to resolve the problema is to find CustomerType on
EntityManager instead to create a new object for that... but this change is
very complex in my application.
Is this a problem of openjpa or hibernate implementation?
--
______________________________ _
Enrique Rodriguez Lasterra
lasterra AT gmail DOT com
--
_______________________________
Enrique Rodriguez Lasterra
lasterra AT gmail DOT com
