Check class creation in OrientDB

问题

I'm trying to create classes with pyorient driver but sometime if class exists I got class exists message. Is there a way to check whether class is exists or not in OrientDB python driver? Here is part of my sample code for class creation...

@classmethod
def create(cls):

    cls._cluster_id = OrientEngine.client.command("CREATE CLASS %s EXTENDS V" % cls.__name__)
    return cls._cluster_id

回答1:

Via SQL to check the existence of "OUser" class execute this:

SELECT FROM ( SELECT expand( classes ) FROM metadata:schema ) WHERE name = 'OUser'

Via Java API:

OClass cls = db.getMetadata().getSchema().getClass("OUser");

来源：https://stackoverflow.com/questions/28288268/check-class-creation-in-orientdb