Changes between Initial Version and Version 1 of ModifiedPreorderTreeTraversalInAdmin

Timestamp:

Mar 10, 2006, 6:44:18 PM (18 years ago)

Author:

[530]

Comment:

Experimental

ModifiedPreorderTreeTraversalInAdmin

@@ +1 @@
+Looking at the mptt example [http://code.djangoproject.com/wiki/ModifiedPreorderTreeTraversal] it seemed a bit complicated for a normal user to understand. So i made my own, but considering i cannot group by makes aggregate functions hard (impossible?) to make this work nice, but magic-removal made it easier. But, here it is mostly . Use at will and own RISK, but if/ when you improve it i would like to see it made available.
+
+I attach the file and give a example here. Just add fields to this and in should work.
+
+Example using project name myproject and app name pages.
+
+{{{
+
+from myproject.pages.models import Page
+
+tree = Page.manager.all() # get entire tree
+
+parent = Page.manager.get(pk=10) # get object you want to get the children of
+children = parent.get_children() # returns empty dict if no children are found
+
+parent = children[0].get_parent() # gets the parent
+
+}}}
+
+Preordered trees are great if done correctly, this is not.