Rails的管理員顯示：拇指圖像

Question

我有以下代碼：

config/initializers/rails_admin.rb

list do 
     field :id  #currentId set in app/views/rails_admin/main/index 
     field :year 
     field :title 
     field :intro 
     field :description 
     field :confidential 
     field :star 
     field :image do 
     formatted_value do 
      bindings[:view].tag(:img, { :src => bindings[:object].image.url(:thumb)}) 
     end 
     end 
    end 

app/models/submission.rb

class Submission < ActiveRecord::Base 

    # Image attachment and validations 
    has_attached_file :file, 
    :url => "/files/:class/:attachment/:id/:style/:basename.:extension", 
    :path => ":rails_root/public/files/:class/:attachment/:id/:style/:basename.:extension", 
    :styles => { :thumb => "100x100#", :small => "150x150>", :medium => "200x200" } 

    # Validate attachment type 
    validates_attachment_content_type :file, :content_type => 'application/pdf' 

end 

問題：在列表視圖中，爲什麼我沒有拿到那:thumb圖像和我得到一個非常大的圖像？我猜斬波程序根本不起作用？

Answer 1

有

validates_attachment_content_type :file, :content_type => 'application/pdf' 

和你期望的圖像進行調整，我認爲你檢查你的模式和實施再

關注這個

https://github.com/thoughtbot/paperclip/wiki/Thumbnail-Generation