主动管理员图片上传

Question

我是新的 ruby​​ 和 ruby​​ on rails。我想用活跃的管理员上传图片
我遵循这段代码
应用\管理员\book.rb ActiveAdmin.register 书做

# See permitted parameters documentation:
# https://github.com/activeadmin/activeadmin/blob/master/docs/2-resource-customization.md#setting-up-strong-parameters
#
 permit_params :list, :of, :attributes, :on, :model
#
# or
#
# permit_params do
#   permitted = [:permitted, :attributes]
#   permitted << :other if resource.something?
#   permitted
# end
index do
  column :name
  column :image


  column :author
  column :genre
  column :price
  actions
end
form :html => { :enctype => "multipart/form-data" } do |f|
   f.inputs "Details" do
    f.input :image, :as => :file, :hint => f.template.image_tag(f.object.image.url(:medium))
    f.input :author
    f.input :name
  end
  f.actions
 end
end

和
app\models\book.rb

class Book < ActiveRecord::Base
  belongs_to :author
  belongs_to :genre
has_attached_file :image, :styles => { :medium => "238x238>", 
                                   :thumb => "100x100>"
                                 }
end

是的，我在创建页面中看到了文件上传按钮。但不要保存表单。

Answer 1

您应该将您的参数添加到允许的参数列表中。

#
# I can assume these are your fields that is 
# what you will submit with your form. 
# Try replacing my code with yours. 
# That will work if you don't make other changes.
#
permit_params :image, :author, :name

让我知道进展如何。如果您遇到任何错误，请分享您的日志，如果需要，我会更新我的答案。