Yep, orderinglist handles that case.
Michael Bayer wrote: > forwarded from pvt email.... > > orderinglist ? > > Begin forwarded message: > >> *From: *Emmett <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>> >> *Date: *September 22, 2008 9:51:31 AM EDT >> *To: *Michael Bayer <[EMAIL PROTECTED] >> <mailto:[EMAIL PROTECTED]>> >> *Subject: **Re: Support for ordered lists of child items* >> >> Hello Michael, 18 months later, would your answer to Aaron still be >> the same? >> >> I have a problem fitting what Aaron described. ie. save+restore of >> child order after re-ordering in the Python side. Re-ordering child >> list elements would obviously be ideal, but I could cope with updating >> an extra integer node attribute instead. >> >> I'm completely new to SA and at this stage skimming documentation and >> looking at the tree examples. Found this thread, so wondering if some >> newer SA magic can solve this, or if a custom collection class or >> something else is the best solution. >> >> I also looked at the ElementTree examples, but they don't appear to >> guarantee child order either - correct? >> >> Thanks in advance. I looked at your activity in this group. Amazing! >> >> >> On Apr 10 2007, 4:02 am, Michael Bayer <[EMAIL PROTECTED]> >> wrote: >>> we dont have the capability to automatically update ordering columns >>> when the elements of a list are moved around. if you move the >>> elements around, you need to execute some step that will update the >>> index columns (or create a custom collection class that does this for >>> you). >>> >>> On Apr 9, 2007, at 12:42 PM, Aaron Digulla wrote: >>> >>> >>> >>>> Hello, >>> >>>> I'm looking for a feature but couldn't find it in the docs. >>> >>>> I have atreelike structure where the user can specify theorderof >>>> thechildrenof a node. In DB lingo, I have a parentId and an index >>>> column. When I loadchildren, they should be ordered by the index. >>>> This seems to be supported. >>> >>>> Can SA also update the index column when I movechildrenin the list >>>> around? Like: >>> >>>> # ... parent has threechildrenA, B C >>>> item = parent.children[0] >>>> del parent.children[0] >>>> parent.children.insert (1, item) >>>> # now, parent has threechildrenB, A, C >>> >>>> Regards, > > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
