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好了,所以我有這個模型......Rails的回形針自定義文件路徑
class Asset < ActiveRecord::Base
attr_accessible :asset_file_name, :lesson_id, :attachment
has_attached_file :attachment,
:url => "/attachments/:id/:basename.:extension",
:path => ":rails_root/public/attachments/:id/:basename.:extension"
validates_presence_of :asset_file_name
validates_attachment_presence :attachment
end
(也有一款型號爲Lesson
)
我想附件保存到/attachments/:lesson_id/:basename.:extension
。 這不是資產的:id
,而是:lesson_id。當我這樣做時,該目錄實際上只是名爲:lesson_id
。任何人都知道如何獲得實際的lesson_id
?我也試過@asset.lesson_id
。