About primary key

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Forum
25

remove & persist in same transaction => Attempt to reuse an existing primary key value

an existing primary key value (Persist_Remove_Persist$EntityA:1)   We created a small test ... and then in the same transaction persisting another object with the same primary key of the removed object
Issue
24

Merge throw exception "Attempt to reuse an existing primary key value"

Hi, if Id = 0 I got javax.persistence.EntityExistsException: com.objectdb.o.UserException: Attempt to reuse an existing primary key value (ru.dz.train.test.ZeroIdTest$MyEntity:0)   if Id=1 no exception code : import javax.persistence.*; public class ZeroIdTest {     public static void main
Forum
24

Query on Embedded Primary Key?

Hi, I am trying to use Embedded Primary Key - but seems I can't retrieve them correctly with the query below - the query seem to work fine for other field (in the code = primkeycopy). The error I get when is below - it complains about a casting issue. Let me know how to fix it - (full reproducible
Forum
24

Uninitialized primary key (id = 0)

Exception in thread "main" [ObjectDB 2.2.9_04] javax.persistence.RollbackException Failed to commit transaction: Attempt to reuse an existing primary key value (image.Meta:0) (error 613) at com.objectdb.jpa.EMImpl.commit(EMImpl.java:277) I check the db by explorer.jar, and find
Forum
23

Internal ObjectDB error by read the primary key

Internal ObjectDB error by read the primary key
FAQ
22

Is ObjectDB better than competing object databases?

databases do not support user defined primary keys, even though this is very useful in almost every application. ObjectDB supports user defined primary keys including composite primary keys. The support
Manual
22

Database Explorer [2011-09-21]

and primary key separated by # (e.g. Point#1). A collection can be specified as a comma separated list ... , which has to be specified by type and primary key separated by # (e.g. Point#1). The Edit > Set Reference ... type and primary key separated by # (e.g. Point#1). The Edit > Add to Collection > Add New Object
Manual
22

Database Explorer

and primary key separated by # (e.g. Point#1). A collection can be specified as a comma separated list ... , which has to be specified by type and primary key separated by # (e.g. Point#1). The Edit > Set Reference ... type and primary key separated by # (e.g. Point#1). The Edit > Add to Collection > Add New Object
JDO Doc
19

javax.jdo.annotations.Key

javax.jdo.annotations Annotation Key Target: Fields (including property get methods) Annotation for the key of a map relation. Corresponds to the xml element "key". Since: JDO 2.1 String column Name of the column to store the key in. Name of the column to store the key in. Returns: name
JPA Doc
18

javax.persistence.EntityManager

(Class entityClass, Object primaryKey) Find by primary key. Find by primary key. Search for an entity of the specified class and primary key. If the entity instance is contained in the persistence context, it is returned from there. Parameters: entityClass - entity class primaryKey - primary key