About null

forum_thread

Broken @ManyToOne reference

Hi, I have objects of type A belonging to objects of type B, defined as follows: @MappedSuperclass public abstract class A {   @Id   @ManyToOne(fetch = FetchType.EAGER, cascade=CascadeType.ALL, optional=false)   private B b;   @Id   @Column(length = 36)   private String stringId; } @MappedSuperclass public abstract class B {   @Id   private String name; } ... the 'b' variable in all A objects is always null. Regards, Vladimir PS: the same configuration ... the Child instance is retrieved. Now it has null in the prn field . The output shall look like: Parent ...

 
release

2.6.9

... a NullPointerException  due to unexpected null SharedCacheMode in PersistenceUnitInfo. Fixed a ... Fixed a bug in comparing String based enum to   NULL in queries. Fixed an activation issue with hosteurope.de ( ...

 
api-jdo

javax.jdo.PersistenceManagerFactory

The PersistenceManagerFactory is the interface to use to obtain PersistenceManager instances.(Interface of JDO)

 
release

2.4.6

... clearing). Fixed the Explorer to show null values in primitive fields (unset values in new fields) correctly. ... Changed non loaded collections on detachment to null (rather than empty collections ). Fixed a critical bug ...

 
release

2.5.1

... Fixed Doctor's index rebuilding to use NULL values for missing values of new fields. Fixed a bug in ... clearing). Fixed the Explorer to show null values in primitive fields (unset values in new fields) correctly. ...

 
release

2.4.5

... clearing). Fixed the Explorer to show null values in primitive fields (unset values in new fields) correctly. ... Changed non loaded collections on detachment to null (rather than empty collections ). Fixed a critical bug ...

 
release

2.5.6

... Fixed a bug in comparing String based enum to   NULL in queries. Fixed an activation issue with hosteurope.de ( ... Fixed Doctor's index rebuilding to use NULL values for missing values of new fields. Fixed a bug in ...

 
release

2.4.1

... Changed non loaded collections on detachment to null (rather than empty collections ). Fixed a critical bug ... a replicated slave server. Fixed NOT NULL handling for basic (non relationship) references. Fixed a ...

 
release

2.5.7

... Fixed a bug in comparing String based enum to   NULL in queries. Fixed an activation issue with hosteurope.de ( ... Fixed Doctor's index rebuilding to use NULL values for missing values of new fields. Fixed a bug in ...

 
api-jdo

javax.jdo.Query

The Query interface allows applications to obtain persistent instances, values, and aggregate data from the data store.(Interface of JDO)