I'm working on developing an API that, among other things, allows for partial updates or insertions to a parent's children. One minor problem that I've found is that any access to parent.children loads the entire collection -- when in many cases it's not necessary to do so.
For instance, statements like these -- in a one-to-many relationship (or potentially some forms of many-to-many relationships, but that's outside my current use-case.) # Add a new child to parent.children. All's this really does is set child.parent_id, so it doesn't need to know anything about other children parent.children.append(new_child) # lists parent.children.add(new_child) # sets # Determine if a particular child belongs to this parent... basically returning child.parent is parent or child.parent_id == parent.id child in parent.children # Remove a particular child from a parent parent.children.remove(child) # Raise keyerror if child not in parent.children, I'd like to find a way to mimic this in a way that still allows for 'normal' load strategies -- i.e. still allowing "for child in parent.children" to work as normal (triggering the load at that time.) Ideally, there'd be a way to get at just the modifications as well. Any thoughts on how I might accomplish this? -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
