db4o Developer Community

My apologies for such a noobie-Q, but I was just wondering: what is the simplest, recommended way to retrieve a single object from the DB4O ObjectSpace (uinsg C# on .NET 3.5 SP1)?  E.g., I want to store an instance of class UserSettings. So one way then I'm guessing would be..  m_UserSettings = ...

Hi It is a pleasure to see the international replies!  . . . in general, I mean to say.     I am having trouble identifying the descendant/child class returned by a query, for GUI presentation. What is a good approach -  I do not want to change model from inheritance to composition. Not being java a programmer, the ...

hi, I have an simple inherited object. eg:  Child extends Parent. When I query Parent objects, I get both child & parent. Is there a way to fetch only parent objects using SODA ? thanks in advance.

Hi! Schreibe gerade meine Diplomarbeit und db4o ist ein Teil davon. Da man in der Diplomarbeit jede Abkürzung ausschreiben muss, suche ich nun nach der Bedeutung von SODA, finde aber nix. Wofür steht SODA? Oder ist es vielleicht garkeine Abkürzung?   Vielen Dank,  Dominik 

Olá!Tenho uma dúvida que tenho certeza que muitos ainda vão terão (se já não tiveram) em relação a busca dinâmica. Por ex: Em um formulário com alguns campos, por exemplo, Nome, Cidade, uma combo de Departamentos, e uma de Cargos, ambas populadas por seus respectivos objetos, onde o usuário fará uma busca de que se não preencher nenhum campo e ...

consider the following case: i am storing items i1 and i2 storing a list of other items (i1 contains i11 and i12, i2 cotnains i21). i want to retrieve only those items (i1 or i2) that contain two other items (i11 and i12). the following code returns i1 if i query for items that contain i11 or i12 but not if i want to make sure that the returned ...

what types (or clas) i can use in soda query to aply greater, equal and less constrain? is possible to use constrain to custom types? 

I have 2 suggestions for future db4o [.NET] versions. 1. I have one persistent class, which stores data in an array. It does so because I don't know what properties will be stored at compile-time. But at run-time I know that, for example, data[0] = 'first name', data[1] = 'last name', data[2] = 'address' and so on. Now, db4o doesn't (?) ...

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First: i read the other threads, i do commit, i raised the heap space up to 512MB but the problem remains: Exception in thread ''AWT-EventQueue-0'' java.lang.OutOfMemoryError: Java heap spaceI use Java 6, db40 6.4 My DB is about 60MB large (it all works fine with smaller DBs) With the objectmanager I can see all datasMy ...