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Is it ok to put list or map of embeddable objects in entity ?

. When I try to inspect them with explorer, there is an error saying "Failed to deserialize - type X ... previous content is automatically deleted. To see serialzable objects in the Explorer try to add the classpath to the JVM when you run the Explorer. But actually it is recommended to avoid relying

Problem on JPA Merge Entity.

is a null value. I check with the Explorer, the statement has a null value on the property ... . On the other side if we look in the ObjectDB explorer we can see that the new component has been saved but not attached

ways to recover from DB curruption

Hi, I have a database file which was mistakenly opened by a different version of my entities model and is now not usable any more. When I try to open this file using explorer or even running ... Try opening the database in your application (not in the Explorer / Doctor) with the new classes

Double persist of Entity field with Cascade.ALL

when viewed in Explorer. Let me also mention an additional observation I made: if the new chapters ... to the book record. In ObjectDB Explorer, you should see the Book table correctly recorded but the Chapter

Schema-Update: Rename superclass and remove one subclass

Hello, we renamed a superclass and removed one of the subclass. If we then try to open the Database (with ObjectDB-Explorer) we get a "Failed to generate dynamic type ..." Small Example: Generate ... (); emf.close(); } If we try to open the database with the ObjectDB-Explorer we get the described

Level 2 cache not hit in @ManyToOne

Hi! I have 2 entities: User and Item, both @Cacheable. Item has @ManyToOne private User user. Level 2 JPA cache is activated and it works ok for find by id (tested by changing data in explorer ... "user". "user" is loaded each time from the DB (tested by changing data in explorer and reading in

Unexpected COUNT Results

We are working with objectDB version 2.5.5.b01. (we also tried to use the latest version 2.6.1) We have several issues with queries that can be seen with the attached database and using ObjectDB explorer: 1. Using ObjectDB explorer a. SELECT $1.id FROM Pa3DataKey $1 WHERE $1.timestamp <= 187526

java.sql.Time field off by 30 minutes

Hihi, I'm wondering if this is a bug. I have a simple entity with java.sql.Time field. On writing and readback, the field is found to be 30 minutes off. It is observed on objectdb explorer as ... Richard Since the problem doesn't occur in my environment, exploring it is difficult and your help

Query Execution Error

')).contracts.active=true)))) results in "Query Execution Error===null" in Explorer and Internal Exception ... in explorer with attached db. Alex quasado Alexander Adam Okay, this seems to work (adding a null

ArrayIndexOutOfBoundsException on flush

at the database in explorer it looks like some of the "WorkflowInstance" objects have failed to persist (explorer lists an exception message rather than the object). The following error message from

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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