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Can you give us a recommendation as we can represent the Key (UUID) most efficient? Both in terms ... . We already need the key before the entities are persisted so that we can build even references. a) Composite Primary Key   with two Longs b) Embedded Primary Key with two Longs c) Furthermore, as String

your license with different operating system, as long as it is the same computer, but sometimes this doesn't

Hello! How does ObjectDB determine the machine ID? Yesterday I activated our license on my development laptop and today I tried to persist more than 1M objects. ObjectDB told me that it cant't do that because of the evaluation restrictions. Now I activated it again on the same machine and got

Ran into the problem again. Suddenly, on my development laptop, objectdb required me to regenerate a new license !   dmoshal David Moshal Try to activate ObjectDB again on your development laptop. Maybe this activation will reveal the unexpected changes that cause ObjectDB to identify the laptop as a different machine.   support Support

according to chat on ticket https://www.objectdb.com/ticket/2983 can you add my licenses back please ? kadirbasol Kadir BASOL The licence will become linked after the first activation. support Support

How to get Foreign key using  org.eclipse.persistence.queries.WriteObjectQuery class ... can get line level primary key but i also nead to get foreign key which is belongs to header ... this i got pojo name query.getPrimaryKey() by using this i can get primary key now i nead

;bidirectional @OneToOne association that has a shared primary key , example: http://fruzenshtein.com/bidirectional-one-to-one-primary- key -association/ Can ObjectDB support this same specific relationship ... keys , i.e. the primary key will be stored at least on one side of the relationship

and recommendations, in particular there are some primary keys with value == 0. These cause problems for objectDB, typically "JPA Unexpected argument as primary key ". When using eclipselink, there is a workaround ... Lister There is nothing wrong with 0 as a primary key value. For example the following code doesn't

.customProperties cp WHERE KEY (cp) = :propertyName AND VALUE(cp) = :propertyValue ORDER BY td.createdTimeMillis I get the "Unexpected query token ' KEY '" error. Is there another way to do this and I am just using ... with a collection of embedded objects. This will also enable defining indexes on the keys /values

Is there a way to create an Index with @Index on the key of a map? wua Andreas Wurm Indexes on map keys as well as queries on map keys are currently not supported. But as a workaround you can use a collection of embedded objects, as demonstrated below: package test; import java.util.*; import

.RollbackException Failed to commit transaction: Attempt to reuse an existing primary key value ... .EntityExistsException: com.objectdb.o.UserException: Attempt to reuse an existing primary key value ... with the same primary key . Unfortunately it is impossible to provide help based on this report

Hi, I'm trying to create two tables (Parent and Child) with a foreign key constraint from Child ... one specific case that foreign key constraint doesn't apply and I can't figure how to make it work ... want to remove all orphaned child entities (as with a foreign key constraint). Interestingly

Hi,   I don't have a useful test case to expose this issue, but I am getting an intermittent "Attempt to reuse an existing primary key value". In this particular instance, the error is: Attempt to reuse an existing primary key value (com.x.y.z.UserPassword:1) (error 642) at com.objectdb.jpa

Hi, When I use a composite key in an entity and fill this database with this entity, ObjectDB explorer throws me an error when opening this database saying something about an invalid ID class ... has been attached to this ticket. The code itself looks like this:   KEY : public class PersonId

.3.7_21 should fix it. The composite primary key issue is unclear, since switching to a single primary key field doesn't seem to make any difference. support Support

Hi, I am new to both JDO and ObjectDB, and am struggeling to figure out how to define foreign key relationships. For instance, I have create two classes: @Entity public class Person implements ... ; Any help appreciated! ralfne Ralf Stefan Neumann ObjectDB doesn't enforce foreign key constraints

that, and query the table all the PK fields are null or 0.  What can I do to modify primary keys ?     Trianglehead Json Error ObjectDB doesn't support changing primary keys , as it may break

to reuse an existing primary key value... My primary keys are annotated as shown below : @Id

. i'm loading data from an external source. i use keys from that source. since i have a singleton i ... and can't see an option to retrieve an object w/o using a key . can this be done? duetto john cummings You can use a single result query . support Support

Hi! Explorer says "unexpected token" on KEY (..: SELECT FROM individual.IndividualContact $1 LEFT OUTER JOIN $1.profile.title.name m WHERE ( KEY (m) = 'deu' AND VALUE(m) LIKE '%Dr%') profile = embedded entity title = referenced entity name = Map   thanks, Alex quasado Alexander Adam Yes

to reuse an existing primary key value (Persist_Remove_Persist$EntityA:1)   We created a small ... key of the removed object. Obviously a possible workaround is to update the object instead

I have two classes, Cell and Character.  Basically, the cell is like a room, and contains a variable (private Set cellHeldCharacters;) which holds the IDs of the characters within the cell (The IDs are Primary Keys ).  Can I use the Foreign Key annotation for the variable, or

an existing primary key value (MyTestCase$MyEntityChild:'child1') at com.objectdb.o ... test case, i am pretty sure that "Attempt to reuse an existing primary key value" on my merge

that the pMap field of some Person objects has the key /value pair "location'/'California'.  Can I

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

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 the only one record

Cross-platform license: Ubuntu and Windows 8

Clarification on free license restrictions

Internal ObjectDB error by read the primary key

to a foreign key column or columns in one of the tables mapped by the entity, a one-to-one association usually maps to a unique foreign key relationship (sometimes using a shared primary key ), a one-to-many association usually maps to a foreign key column or columns in one of the tables mapped by

of the key of the represented Map Super Interfaces: PluralAttribute , Attribute , Bindable Instances ... . Since: Jakarta Persistence (JPA) 1.0 Class getKeyJavaType () Return the Java type of the map key . Returns: Java key type. Since: Jakarta Persistence (JPA) 1.0 Type getKeyType () Return the type

(Optional) The foreign key columns of the collection table which reference the primary table of the entity ... primary key column.) However, if there is more than one join column, a JoinColumn annotation ... the generation of a foreign key constraint for the columns corresponding to the joinColumns element

Loading eagerly a map that uses entity objects as keys is currently unsupported, if the equals and hashCode methods of the keys are based on the key entity persistent content, since that content ... ;   MyKeyEntity key = new MyKeyEntity(" key ");         em

Hi! We have an entity with a composite primary key on "primaryVariantOid" and "storeOid" fields ... entityManager.find to look up every entity by the primary key . This ended up being even faster ... was also trying to find if there was any API like entityManager.find, but for bulk retrieval by primary keys

of the foreign key column. The table in which this column is found depends on the context. If the join is for a OneToOne or ManyToOne mapping using a foreign key mapping strategy, the foreign key ... OneToMany mapping using a foreign key mapping strategy, the foreign key is in the table of the target entity

) The name of the map key column. The table in which it is found depends upon the context. If the map key is for an element collection, the map key column is in the collection table for the map value. If the map key is for a ManyToMany entity relationship or for a OneToMany entity relationship using a join

) The name of the table that contains the foreign key column. If the join is for a map key for an element collection, the foreign key column is in the collection table for the map value. If the join is for a map key for a ManyToMany entity relationship or for a OneToMany entity relationship using

Hello Object Db community :) I am using this wonderful library and I caught a strange exception while testing the "composite key " feature in JPA. Let's see what I am doing : @Entity public class ... be reproduced with a simple ( not embedded Id ) key with an enum type. Here is the code : package test

------------------- [1] Page #9 entry 0 has unexpected object format [2] Page #9 entry 0 ( key 'bjjl') has 75 ... ] Page #3 entry 0 has unexpected object format [2] Page #3 entry 0 ( key 'guest') has 11 extra bytes

I observed that on new ObjectDb v.2.6.4.b10 query below causes internal exception SELECT DISTINCT $1 FROM Pa3DictionaryItem $2 JOIN $2.values $1 WHERE ($2.namespace == 'com.anritsu.pa3.ttcn3' AND $2. key == 'TliEvent' AND $1 != '') Query above also worked fine on ObjectDb version 2.6.1.b06 Harman

The feature of creating new objects in the Explorer is currently supported only for entity classes that have primary keys that are set automatically. support Support

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

: Annotation Target: Method, Field Specifies the mapping for composite foreign keys . This annotation ... the generation of a foreign key constraint when table generation is in effect. If both this element ... . If no foreign key annotation element is specified in either location, a default foreign key strategy

) If the attribute references a Map type, this element can be used to specify a subgraph for the Key in the case of an Entity key type. A keySubgraph can not be specified without the Map attribute ... subclass subgraphs. The value of this element is the name of the key subgraph as specified by

. Since: Jakarta Persistence (JPA) 3.2 Map getNamedEntityGraphs ( Class entityType ) A map keyed by graph ... : a map keyed by graph name. Since: Jakarta Persistence (JPA) 3.2 Map getNamedQueries ( Class resultType ) A map keyed by query name , containing references to every named query whose result type

: - the source type of the join - the type of the target Map value - the type of the target Map key Super ... Persistence (JPA) 1.0 Path key () Create a path expression that corresponds to the map key . Returns: path corresponding to map key . Since: Jakarta Persistence (JPA) 1.0 Predicate notEqualTo ( Expression

collection whose key and/or value is an embeddable class. When AttributeOverride is applied to a map, " key . " or " value. " must be used to prefix the name of the attribute that is being overridden in order to specify it as part of the map key or map value. To override mappings at multiple levels

to map composite foreign keys . Example: ValuedCustomer subclass @Entity @Table(name = "VCUST ... the generation of a foreign key constraint when table generation is in effect. If both this element ... is undefined. If no foreign key annotation element is specified in either location, a default foreign

class. A generated primary key value is available when this callback occurs only for UUID , TABLE , or SEQUENCE primary key generation. For IDENTITY primary key generation, the generated primary key

of the persistent field or property of the associated entity that is used as the map key . Default: If the name element is not specified, the primary key of the associated entity is used as the map key . If the primary key is a composite primary key and is mapped as IdClass , an instance of the primary