Graph Database in ruby?

Are there any graph开发者_Python百科 database in ruby . i have heard of neo4j in Jruby , Are there any pure implementation of graph database in ruby ?

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I have been researching this myself. There are a number of interesting graph databases; however, Neo4j and OrientDB are the only ones for which I found any sort of Ruby API.

While not a true Graph Database, FlockDB uses a MySQL backend to mimic graph database constructs.

InfoGrid and HyperGraphDB looked interesting, but sadly, no Ruby API.

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I really like OrientDB and you can use it through REST although it would be somewhat minimal.