ruby-on-rails – 使用Dragonfly进行Rails管理 – 编辑.没有档案

在我的rails_admin中,我做到了这一点.

edit do
  field :name
  field :information
  field :ob,:dragonfly
  field :document_categories
end

这是我的模特：

class Document < ActiveRecord::Base
  has_and_belongs_to_many :document_categories


  after_commit :generate_versions,on: :create
  dragonfly_accessor :ob


  validates :name,:ob,presence: true

  def generate_versions
    DocumentWorker.perform_async(self.id)
  end

  def convertable_image?
    unless self.try(:ob).nil?
      self.try(:ob).mime_type.include?("image") || self.try(:ob).mime_type.include?("pdf")
    else
      return false
    end
  end

  def respond_with_type
    case self.try(:ob).mime_type.split("/")[1]
      when "vnd.ms-powerpoint","vnd.openxmlformats-officedocument.presentationml.presentation","application/vnd.openxmlformats-officedocument.presentationml.template"
        "powerpoint"
      when "application/vnd.ms-excel","vnd.openxmlformats-officedocument.spreadsheetml.sheet"
        "excel"       
      when "application/msword","vnd.openxmlformats-officedocument.wordprocessingml.document"
        "word"                
      else
        self.try(:ob).mime_type.split("/")[1]
      end
  end  
  default_scope{order("name ASC")}
end

这是我的架构：

create_table "documents",force: :cascade do |t|
    t.string   "name"
    t.string   "ob"
    t.datetime "created_at",null: false
    t.datetime "updated_at",null: false
    t.string   "ob_uid"
    t.string   "ob_name"
    t.text     "information"
  end

还有什么我需要做的才能拿起文件吗？

https://github.com/sferik/rails_admin

https://github.com/markevans/dragonfly