Rails的回形針預編譯錯誤

Question

我修改了使用回形針模型是這樣的：

class UsersPicture < ActiveRecord::Base 
attr_accessible :user_id, :users_picture_id, :photo 
belongs_to :user 
has_attached_file :photo, 
    :url => "users_pictures/:attachment/:id/:basename.:extension", 
    :path => ":rails_root/users_pictures/:attachment/:id/:basename.:extension" 

before_create :rename_file_name 

def rename_file_name 
    extension = File.extname(photo_file_name).downcase 
    filename = File.basename(photo_file_name).downcase 
    timestamp = Time.now.to_i 
    name = Digest::MD5.hexdigest("#{filename}") 
    self.photo.instance_write(:file_name, "#{name}_#{timestamp}#{extension}") 
end 
end 

之前，我插入before_create方法，一切都很好。 但現在我的日誌說：

ActionView::Template::Error (users_pictures/photos/88/8b7474622cf5bbc140ed7defe1ae76a8_1351088476.jpeg isn't precompiled): 
8: <p> 
9: <b>Users picture file:</b> 
10: <% if @users_picture.photo.exists? then %> 
11:    <%= image_tag @users_picture.photo.url %> 
12:   <% end %> 
13: </p> 
14: 
app/views/users_pictures/show.html.erb:11:in `_app_views_users_pictures_show_html_erb__597237708__324410398' 
app/controllers/users_pictures_controller.rb:18:in `show' 

我正在尋找解決方案，但總是記得用「IMAGE_TAG」。但我目前正在使用它？ 當然索引工作得很好，但show方法沒有：/ 我可以改變什麼？ 編輯：當我刪除I​​MAGE_TAG，我得到： users_pictures /照片/ 88/8b7474622cf5bbc140ed7defe1ae76a8_1351088476.jpeg

，這也是正確的路徑。

Answer 1

嘗試用/

<%= image_tag "/" + @users_picture.photo.url %> 

前綴圖像路徑從https://stackoverflow.com/a/11318133/418819