node['hoge']['web']['user'] が他のレシピで定義されていなかったら、'fuga'をdefaultに設定する方法は以下
attributes/default.rb
default[:hoge][:web][:user] = (node['hoge']['web']['user'] rescue nil) || 'fuga'
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Attributeが未定義の場合にだけ定義したいとき
Last updated at Posted at 2014-06-29
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