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我試圖擴展Spree :: Adjustable :: Adjuster,如指南中所述(http://guides.spreecommerce.org/developer/adjustments.html)。的方向是不是要拼命跟着,我跟着他們到t,但我發現了以下錯誤:如何擴展Spree :: Adjustable :: Adjuster?
`<module:Adjuster>': uninitialized constant Spree::Adjustable::Adjuster::Base (NameError)
那麼這說明它我在2.3.1 –