About detached

forum_thread

NullPointerException while setting a new property value

Hello, we are using ObjectDB version 2.4.4 and we are unable to resolve following NPE on enhanced entity: java.lang.NullPointerException at com.objectdb.o.ENT.beforeModifyMember(ENT.java:1099) at model.PluginMetaData.__odbSet_maxAllowedDownloads(PluginMetaData.java:1) at model.PluginMetaData.setMaxAllowedDownloads(PluginMetaData.java:268) at model.PluginMetaData.setPluginDescriptor(PluginMetaData.java:94) PluginMetaData looks like this (nothing extraordinary, no relationship to other @entities): #1 2012-10-22 22:34 Hello, we are using ObjectDB version 2.4.4 and we are unable to resolve following NPE on enhanced entity: ...

 
manual

JPA Entity Fields

Explains how to define and use primary keys in JPA, including composite and embedded primary keys.... Version values cannot be preserved for detached entity objects (explained in chapter 3 ) unless either the entity ...

 
forum_thread

Merge Issue: Attempt to reuse an existing primary key value

Hello, I have just updated my objectdb version from 2.4.6 to 2.5.5. I observed a new bug or a feature on an ordinary merge operation. This is the test case ( work in 2.4.6 version ) : 2 parents object share the same child on a ManyToMany relationship with Cascade.ALL constraint. ... It may be better to use merge only to attach detached objects, and without mixing already managed objects. ...