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manual

Paths and Types in JPQL and Criteria API

Explains how to use object expressions (path navigation, type) in JPA/JPQL.... This page covers the following topics: Navigation through Path Expressions Navigation through a NULL value Entity Type Expressions ...

 
manual

Database Explorer

Explains how to run and use the ObjectDB object database Explorer to view and manage Java/JPA/JDO objects visually.... represented as child nodes. Tree windows provide easier navigation. Because every reference between two database objects is represented ...

 
manual

Database Explorer

Explains how to run and use the ObjectDB object database Explorer to view and manage Java/JPA/JDO objects visually.... represented as child nodes. Tree windows provide easier navigation. Because every reference between two database objects is represented ...

 
manual

Detached Entity Objects

Explains detached entity objects and how to work with detached objects in JPA, including merging them into an EntityManager.... Reference Page... ). Retrieval by navigation from detached objects is not supported, so only persistent fields ...

 
issue

Navigation through lazy loading from Detached Objects

A main limitation of detached objects (as explained on the Detached Entities manual page) is: ... Entities manual page) is: Retrieval by navigation from detached objects is not supported, so only persistent fields ...

 
forum_thread

how to query by properties of onetomany relations? (Error 990)

the following code fails em.createQuery("select f from Foo f where f.bars.name = ?1", Foo.class).setParameter(1, barName) stacktrace: ... Support of direct navigation from collections (with no JOIN) was just added in build 2.2.4_02. ... following exception is thrown on attempt to use the new navigation from collection syntax: Navigation from 'java.util.Set<test.Test$Bar>' through ...

 
forum_thread

Pre-detach loading: retrieval by navigation not working in if statement

objectdb-2.6.3_04 JDK1.7 VM option at runtime: -javaagent:lib/objectdb.jar Experimental mode: objectdb.temp.no-detach NOT USED ... --- Webel IT Australia, "The ...

 
forum_thread

Navigation to Collection Elements

Greetings ObjectDB team, Suppose I have a collection typed field (list/map/set...) in my persistent object of class X. Can I navigate (as oppose to using JOIN) to individual elements (in JPA & JDO) ? e.g.: x.list.get(10) x.map.get("key") x.list.get(10).get("key") // the element itself is a map Thanks & Best Regards #1 2010-09-15 05:53 Greetings ObjectDB team, Suppose I have a collection typed field (list/map/set...) in my persistent& ...

 
forum_thread

Navigation and Parameters

Greetings ObjectDB team, Suppose I pass a List of persistent objects to some query as a parameter, can I navigate to those objects' fields ? E.g.: SELECT x FROM ClassX x WHERE x.a IS MEMBER OF :y.b #1 2010-10-20 11:54 Greetings ObjectDB team, Suppose I pass a List of persistent objects to some query as a paramet ...

 
forum_thread

Navigation through Path to evaluate collection

Hello, I need to evaluate a field ("identifier") which is situated in a collection, within an entity. As stated in the documentation it is not possible to navigate there with the dot operator since its a collection. Is it there a way to evaluate this field? Here is the query, the entity and the related embeddable class. Thanks #1 2016-09-04 09:17 Hello, I need to evaluate a field ("identifier") which is situated in a collection, within an entity. As ...