[sqlalchemy] Re: Fwd: Support for ordered lists of child items
Emmett Lazich wrote: Thank you Jason. orderinglist looks like what I am after! Is your orderinglist plugin fully functional in 0.4.7p1? Yep. Before I attempt it, pls advise if there any technical reason preventing the integration of orderinglist into the basic_tree.py (adjacency list) example? See http://www.sqlalchemy.org/trac/browser/sqlalchemy/trunk/examples/adjacencytree/basic_tree.py That example uses a dict-based collection, so it's not a drop in. But I don't see any obstacle to using the orderinglist on adjacency lists in general. jason kirtland wrote: 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 -~--~~~~--~~--~--~---
[sqlalchemy] Re: Fwd: Support for ordered lists of child items
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 -~--~~~~--~~--~--~---
[sqlalchemy] Re: Fwd: Support for ordered lists of child items
Thank you Jason. orderinglist looks like what I am after! Is your orderinglist plugin fully functional in 0.4.7p1? Before I attempt it, pls advise if there any technical reason preventing the integration of orderinglist into the basic_tree.py (adjacency list) example? See http://www.sqlalchemy.org/trac/browser/sqlalchemy/trunk/examples/adjacencytree/basic_tree.py E. jason kirtland wrote: 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 -~--~~~~--~~--~--~---
