[Betternestedset-talk] Sortable Sets

[Jeremy Nicoll]

Hello John-Paul,

    I've done this in a recent project.  Basically the way I do it is 
check to see what order the a selected item in a list is in, and then 
move that item before/after a child node in the target parent based off 
this information.  It's a bit complicated, but it's doable. I monkey 
patched the module SymetrieCom::Acts::NestedSet to include the following 
method to help me with this scenario:

------------------------------------------------------------------------
        def move_to_parent_location(parent, location)
          parent = nil if parent == 0
          parent = parent === self.class ? parent : 
self.class.find(parent) if parent
          children = parent ? parent.children : self.class.roots
         
          if children.length > 0
            ord = location.to_i
            if ord > children.length
              self.move_to(children.last, :right)
            elsif children[ord] != self
              self.move_to(children[ord], :left)
            end
          elsif parent
            self.move_to(parent, :child)
          end
        end
------------------------------------------------------------------------



*Jeremy Nicoll*
www.gnexp.com <http://www.gnexp.com>
(801) 783-3831


John-Paul Bader wrote:
> Hey there,
>
> I just subscribed so i hope this question isn't redundant.
>
> I'm trying to implement a sortable nested set.
>
> I've already got an application with better_nested_set in place. I  
> also got a nice nested <ul> rendering for my tree. No I'd be able to  
> drag an drop / sort elements across the set.
>
> I found this Wiki entry which says that it wouldn't be a good idea in  
> general to use sortable.create with :tree => true
>
> http://whynotwiki.com/Rails_/_Sortable_trees
>
> On the same page there is a link to the rubyonrails wiki stating that  
> there is a fix expecially for better_nested_set. http://dev.rubyonrails.org/ticket/7807
>
> My question would be what your experiences are. Is there a good way to  
> implement a sortable / draggable better_nested_set ? If not do you  
> have any suggestions, thoughs on this ?
>
> Thanks and kind regards,
>
> John (Berlin / Germany)
> _______________________________________________
> Betternestedset-talk mailing list
> Betternestedset-talk at rubyforge.org
> http://rubyforge.org/mailman/listinfo/betternestedset-talk
>
>   
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