[chef] Search Doesn't Work in Attributes Files

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Hi, I am running Chef 0.10.4 and trying to use search to define default
attributes within an attribute file but it doesn't seem to be working. Even
running,

search(:node, "*:*") do |matching_node|
  puts matching_node.to_s
end

I am able to run this successfully within a recipe, but I was wondering is 
this
the desired functionality?