Rails - Sep 2005 - nested sets and add_child

I''m having some trouble getting nested sets to work. The read methods
work fine:

#works no prob
@root = category.find(1)
@list = @root.full_set

but whenever I try to use add_child(), I get an error:

@root.add_child("camera")

Error:
undefined method `reload'' for "camera":String

Obviously, my string isn''t an object...but I''m not sure why it
thinks it should
be. Am I just using this wrong?

Thanks,
Bryan M

> I''m having some trouble getting nested sets to work. The read
methods work fine:
> 
> #works no prob
> @root = category.find(1)
> @list = @root.full_set
> 
> but whenever I try to use add_child(), I get an error:
> 
> @root.add_child("camera")
> 
> Error:
> undefined method `reload'' for "camera":String
> 
> Obviously, my string isn''t an object...but I''m not sure
why it thinks it should
> be. Am I just using this wrong?
Yes.

The argument for add_child should be an object.

I presume in this case you want it to be a category.

@root.add_child(Category.find_by_name("camera"))

for example.

or you could make a method add_child_category that accepts a string
and then.. well I think you get it.

-Caleb

I think you need to add a category to the set instead of the string. 
Presumably you''ve got something like

class Category < ActiveRecord::Base
acts_as_nested_set
...
end

When you''re adding a string, it doesn''t know how to
act_as_nested_set.
Instead, when you add_child you should add a child of class category.

On 9/5/05, Bryan M <millsb93-MM5q5SmrhtOVc3sceRu5cw@public.gmane.org>
wrote:
> 
> I''m having some trouble getting nested sets to work. The read
methods work
> fine:
> 
> #works no prob
> @root = category.find(1)
> @list = @root.full_set
> 
> but whenever I try to use add_child(), I get an error:
> 
> @root.add_child("camera")
> 
> Error:
> undefined method `reload'' for "camera":String
> 
> Obviously, my string isn''t an object...but I''m not sure
why it thinks it
> should
> be. Am I just using this wrong?
> 
> Thanks,
> Bryan M
> 
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> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
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>

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