Are there object databases for Ruby?

Question

I cannot find object databases for Ruby (do not confuse with Document Oriented, e.g. Coach and Mongo).

Are there more or less mature OODBMS for Ruby?

Thanks.

Answer 1

I know little about this, but I believe that the implementation of MagLev Ruby will include a database of objects.

Answer 2

No mature - because it is usually not done or not required by rubies.