Sorry I was talking about CLASSES command. The point is the following.
Under the hood lightweight edges ARE NOT instances of a class. When I created my database from Java API, I didn't create any class for my edges. I need to create e new edge from command line. 1) I am forced to add a new class, while for all the previous edges I didn't have to do this (also if there are already other edges with the same label) => this is somehow *inconsistent*, since it means at the end I will have some lightweight edges for which there exists a class and others without! 2) The new created class will remain empty, since a new edge isn't a new record => this means the new class I created is *unuseful* I don't remember exactly if there can be a mixed model graphdb (with lightweight AND non-lightweight edges) but I would suggest the following behaviour for ADD EDGE myLabel FROM #1:1 TO #1:2: - IF myLabel extends E AND non-lightweight THEN as usual - IF myLabel IS NOT A CLASS AND lightweight THEN add the lightweight edge It would also be very useful a command to list all the edge types, which is different from listing all the classes extending E. I don't know if this requires to scan all records or a list of lightweight edges is maintained elsewhere. My two cents, Riccardo 2014-11-26 8:22 GMT+01:00 Riccardo Tasso <[email protected]>: > Thank you Luigi, > in this case is there a command to list all the existing "classes" > extending E? > The command CLASS doesn't list lightweight edges, since they're not real > classes. > > Cheers, > Riccardo > > 2014-11-25 18:27 GMT+01:00 Luigi Dell'Aquila <[email protected]>: > >> Hi Riccardo, >> >> what TinkerPop calls labels is represented by OrientDB classes. >> You can create a lightweight edge of a particular class with this syntax: >> >> CREATE EDGE MyLabel FROM #14:1 TO #14:0 >> >> Of course the class MyLabel has to exist and has to extend E >> >> If you use the SET labelName = value, the labelName will become a >> property of the edge, so the edge will become a regular one (not >> lightweight) >> >> Luigi >> >> >> >> 2014-11-25 18:21 GMT+01:00 Riccardo Tasso <[email protected]>: >> >>> Hi, if I tried the following command: >>> CREATE EDGE FROM #14:1 TO #14:0 SET @label="myLabel" >>> But it seems to create a new record in class E. >>> What if I would create a new lightweight edge from command line? >>> >>> I'm using orient 1.7.10. >>> >>> Cheers, >>> Riccardo >>> >>> -- >>> >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "OrientDB" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- >> >> --- >> You received this message because you are subscribed to the Google Groups >> "OrientDB" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. >> > > -- --- You received this message because you are subscribed to the Google Groups "OrientDB" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
