> this is based on the fact that "expunge" has its own "cascade" path. > if we say, expunge along the "delete-orphan" path, thats something > different so maybe that would work,
Yeah, you got right to the root of what I think is the Right Way(tm) The point here is the concept of 'delete-orphan'. If I were to disconnect a child object from it's parent and thereby orphan the child, and also declared my lack of interest in tracking the child with the 'delete-orphan', then I would think the child should be removed if dissociated from its parent -- if it's persisted then deleted, else expunged. Isn't that the whole point of 'delete-orphan', whether persisted or not? Your earlier mail talks about other referencing objects. But hang on a sec: aren't multiple references inconsistent with delete-orphan anyway? Couldn't we disallow other references for delete-orphan relations? That would take care of both the external reference problem to <this> delete-orphan node that's subject to removal, and would also nicely handle any external references to child objects of <this> delete-orphan node: Any children of <this> under-delete node would only be removed if they too were 'delete-orphan', which by definition would eliminate (by prohibition) any other references to them. That would make 'delete-orphan' relationships useful primarily for weakly-linked objects. But I'm going to guess that most delete-orphan relationships would usually be leaf nodes of an object graph anyway. They have a kind of throw-away nature that lends themselves to things like property/attribute rows. > still seems a little creepy to > me. I think the expunge has to happen as an on-attribute event > though, otherwise we'd have to track that action somewhere. I don't follow you here, isn't the removal a de-facto event on the psuedo-attribute of the relation? ....creepy? :-) --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
