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1

Problem with bidirectional link

of multiple references to the same instance of a class? It's hard to tell with the opaque code ... to commit transaction: Attempt to persist a reference to a non managed Folder instance - field Folder ... a reference to a non managed Folder instance - field Folder.children at com.objectdb.o
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1

Should I use ObjectDB and JDO?

JDO API reference unique to ObjectDB, or is it an exact copy of some JDO 2.x API that I could find ... spec is the ObjectDB API reference based on? In other words, which one should I use when coding.  I ... reference. > It looks like JDO is the preferred API for me (because ObjectDB FAQs lead me to believe
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1

alter table

transaction: Failed to get reference value of field field image.MetaSogou.iHei using reflection (error ... to get reference value of field field image.MetaSogou.iHei using reflection at com.objectdb.o ... .o.JPE.g(JPE.java:78) ... 4 more Caused by: com.objectdb.o.UserException: Failed to get reference
Issue
1

Bulk load of eager mapped by (inverse) relationships

. However, inverse (mapped by) references that have to be loaded eagerly currently do not participate in a bulk load, which means that every reference requires running a separate query and doing ... ) fields in bulk as well. Bulk load of eager mapped by (inverse) singular references is now supported in build 2.4.4_13. kborkowski lwalkowski
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1

Can't modify @EmbeddedId in ObjectDB Explorer

of the old entity object to the new object, updating references to the new object, and finally deleting ... are usually immutable in object oriented databases. Because object Ids are used in references between objects, the ability to modify them could cause broken references. It is also a good practice
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1

Database size is much larger than expected (x2)

including it in an embeddable object that is references twice.   >> by referencing it more than once in the same entity So, this is the problem. As OO programming, regardless of how many references ... . This is how it works in JPA (and JDO). Only entity objects have identity and support multiple references
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1

Failed to commit transaction: Attempt to commit a rollback only transaction

References) ----------------------------------- [1] mr.model.MRRound(10):210 Referenced by:   - mr.model ... while keeping references to them, which creates dangling (broken) references in the database. It is possible
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1

Foreign key constraint issue

referring to the parent is persisted parentRepository.delete(parent); // Here trying to delete the parent along with all children referring to it. After the above is executed, only child1 is deleted ... it is the application resposibility (when there are changes). So when a child is instantiated and it references
Forum
1

How to Use a SF with extended Persistence Context?

between calls. When I call the SF directly no problem happens but if I use SL to hold a reference ... with an extended persistence context. the GuestServlet holds reference to a SL called GuestUpdater ... . The GuestUpdater holds reference to the GuestDao who can now give guests from the DB by their names
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1

Is it possible to using JDO and distributed transaction?

I'am new to study JDO. Can and How I use JDO an distributed transaction?(multiple database)。 Is ObjectDB also provided JCA util just like DataNucleus? Reference:     Spring Framework Reference ... through JPA. The solutions that are described in your references have never been tested in ObjectDB