ruby-on-rails-4 – ActiveAdmin复制嵌套表单并删除复选框不起作

应用程序/管理/ project.rb

ActiveAdmin.register Project do

  permit_params  :title,:description,:git_url,:demo_url,:version,:lastpublished,:firstpublished,project_features_attributes: [:project_id,:_destroy => true],project_mentions_attributes: [:project_id,:title,:url,:published,:_destroy => true]

  form do |f|
    f.semantic_errors *f.object.errors.keys
    f.inputs
    f.buttons
  end

  form do |f|
    f.inputs "Project Details" do
      f.inputs :title
      f.inputs :description
      f.inputs :git_url,:default => "http://github.com/"
      f.inputs :demo_url
      f.inputs :version
      f.inputs :firstpublished
      f.inputs :lastpublished      
      f.inputs do
        f.has_many :project_features,:allow_destroy => true,:heading => 'Features' do |cf|
              cf.input :description
        end
      end
      f.inputs do
        f.has_many :project_mentions,:heading => 'Mentions' do |cf|
              cf.input :title 
              cf.input :url
              cf.input :published
        end
      end

    end


    f.actions
  end
end

应用程序/模型/ project.rb

class Project < ActiveRecord::Base
    has_many :project_features,:dependent => :destroy
    accepts_nested_attributes_for :project_features,:reject_if => lambda{ |a| a[:description.blank?] },:allow_destroy => true

    has_many :project_mentions,:dependent => :destroy
    accepts_nested_attributes_for :project_mentions,:reject_if => lambda{ |a| a[:title.blank?] },:allow_destroy => true

    has_many :blogs

end

应用程序/模型/ project_feature.rb

class ProjectFeature < ActiveRecord::Base
    belongs_to :project

end

应用程序/模型/ project_feature.rb

class ProjectMention < ActiveRecord::Base
    belongs_to :project

end