Ruby on rails Activeadmin和曲别针：ArgumentError

我使用Activeadmin、回形针和Rails 4。 当我想创建一篇包含多个图像的新文章时，出现以下错误：

ArgumentError in Admin::Articles#new
wrong number of arguments (1 for 0)

当我尝试只使用一个图像时，我会出现相同的错误

ActiveAdmin:article.rb

ActiveAdmin.register Article do

  controller do
    def permitted_params
      params.permit article: [:title, :images_attributes => [:picture, :id, :_destroy]]
    end
  end

  form do |f|
    f.inputs "Project Details" do
      f.input :title
      f.has_many :images do |p|
        p.inputs do
          p.input :_destroy, :as => :boolean, :label => "Destroy?" unless p.object.new_record?
          p.input :picture, :as => :file, :hint => p.object.new_record? ? "" : f.template.image_tag(p.object.picture.url(:thumb))
        end
      end
    end
    f.actions
  end
end

class Article < ActiveRecord::Base
  has_many :images, :dependent => :destroy
  accepts_nested_attributes_for :images, :allow_destroy => true
end

型号：article.rb

ActiveAdmin.register Article do

  controller do
    def permitted_params
      params.permit article: [:title, :images_attributes => [:picture, :id, :_destroy]]
    end
  end

  form do |f|
    f.inputs "Project Details" do
      f.input :title
      f.has_many :images do |p|
        p.inputs do
          p.input :_destroy, :as => :boolean, :label => "Destroy?" unless p.object.new_record?
          p.input :picture, :as => :file, :hint => p.object.new_record? ? "" : f.template.image_tag(p.object.picture.url(:thumb))
        end
      end
    end
    f.actions
  end
end

class Article < ActiveRecord::Base
  has_many :images, :dependent => :destroy
  accepts_nested_attributes_for :images, :allow_destroy => true
end

我的操作系统是Ubuntu，我使用ImageMagick-6.8.8-7

当我运行转换的

时
我有：
/usr/local/bin/convert

development.rb

PaperclipActiveadmin::Application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # In the development environment your application's code is reloaded on
  # every request. This slows down response time but is perfect for development
  # since you don't have to restart the web server when you make code changes.
  config.cache_classes = false

  # Do not eager load code on boot.
  config.eager_load = false

  # Show full error reports and disable caching.
  config.consider_all_requests_local       = true
  config.action_controller.perform_caching = false

  # Don't care if the mailer can't send.
  config.action_mailer.raise_delivery_errors = false

  # Print deprecation notices to the Rails logger.
  config.active_support.deprecation = :log

  # Raise an error on page load if there are pending migrations
  config.active_record.migration_error = :page_load

  # Debug mode disables concatenation and preprocessing of assets.
  # This option may cause significant delays in view rendering with a large
  # number of complex assets.
  config.assets.debug = true

  # configure paperclip
  Paperclip.options[:command_path] = "/usr/local/bin/"

end

解决方案：

将
require:false
添加到我的输入：

p.input :picture, :as => :file, :hint => p.object.new_record? ? "" : f.template.image_tag(p.object.picture.url(:thumb)), required: false

在my image.rb中添加一个
验证附件内容类型
：

validates_attachment_content_type :picture, :content_type => ["image/jpg", "image/jpeg", "image/png"]

感谢Philip Hallstrom的帮助和您的解决方案，临时解决方案是在您的输入中添加
require:false
。像这样：

f.input :image, required: false

刚试过，对我很有效。
首先，请使用统一的缩进空格。您同时使用4和2个空格，有时在同一个文件中。Ruby社区建议使用2个空格。你确定你已经安装了所有的gems（回形针需要ImageMagick，一个外部程序）。还有，你使用的是什么操作系统？我认为应该有更多的痕迹。我用两个空格编辑了我的帖子。我的操作系统是Ubuntu，我的ImageMagick版本是v6.8.8-7。没有解决方案，但我现在也遇到了这个错误。另外，它现在在2.3.0.rc3中得到了修复，我只需要更新到最新版本。
validates_attachment_content_type :picture, :content_type => ["image/jpg", "image/jpeg", "image/png"]

f.input :image, required: false