Used this which only found parent records with children.
self.all( :conditions => { :type => :duplicate } ).parent_items.each
do | r |
a.push r
end
On Apr 20, 5:28 pm, tenstates <[email protected]> wrote:
> Hi
>
> I had decided to usehttp://github.com/snusnu/dm-is-self_referential
> but am having trouble isolating records without children due to the
> absence of a foreign key in my model to map the values of the join
> table by.
>
> is :self_referential, :through => 'Publication',
> :children => :child_items, # item_child_items
> :parents => :parent_items, # item_parent_items
> :source => :parent_items, # parent_items
> :target => :child_item, # child_items
> :order => [ :published_at.desc ],
> :constraint => :destroy
>
> Is there a clean way to say something like this below but in reverse
> so as to only get back those results without children? I have tried a
> number of combination's, but really need some pointers.
>
> item = Item.all
> item.child_items.each { | child | item.object_id ==
> child.parent_items.object_id }
>
> Thanks
>
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