On Rails 3, a default_scope order("lft") breaks set_default_left_and_right

[kofno]

On rails 3, using SQLite:

Given the following class

class Item < ActiveRecord::Base
  acts_as_nested_set
  default_scope order("lft")
end

Then creating new items invalidates the tree.

This is because the default scope is included in the set_default_left_and_right scope, which breaks the calculation.

Here's my current work around:

class Item < ActiveRecord::Base

  ...

  protected

  def set_default_left_and_right
    Item.unscoped do
      super
    end
  end
end

[parndt]

What can we do to fix this in the core?

[aserafin]

I had similar problem with using rebuild! function and having default_scope order("position asc") declared in my model. I've fixed it with adding

def rebuild!(validate_nodes = true)
  unscoped do
    #method code here
  end
end