Rails ActiveAdminのselectを連動させようとするとinsert_tag renderer_for(:edit)というエラーが出てします。

Question

Active Adminを用いて管理画面を作成しております。

ItemがCategoryとChildCategoryを持っています。
CategoryとChildCategoryは親子関係になっており、管理画面からChild_Categoryを付与するとCategoryも一意に決まるという仕様です。

Item
belongs_to :category
belongs_to :child_category

ChildCategory
belongs_to :category

ChildCategoryが多くなってきたため、Categoryを選択したらChildCategoryが絞り込まれるようなコードを下記のURLを参考に書いてローカル開発環境では動いたのですが、ステージングではItemのedit（編集）にアクセスができなくなってしまいました。

http://blog.kazuya.co/ruby%20on%20rails/2015/02/25/active-admin-select.html

  form do |f|
      f.inputs "Item Detail" do
f.input :category, :input_html => {
:onchange => "
  var category_id = $(this).val();
  $('#gif_child_category_id').val(0).find('option').each(function(){
  var $option = $(this);
  var isThisCategory = ($option.attr('data-category') == category_id);
  if (!isThisCategory) {
      $option.hide();
    }
    else{
      $option.show();
    }
  });
"
}
f.input :child_category, collection: ChildCategory.all.map { |c| [c.name, {"data-category" => c.category.id}]}      f.input :score
      f.input :is_private
      f.input :created_at
      f.input :deleted_at

      f.inputs do
        f.has_many :tags, allow_destroy: true do |t|
          t.input :name
        end
      end
    end
    f.actions
  end

ログを見ると
insert_tag renderer_for(:edit)
というエラーで止まっています。

もし、何か心当たりがある方がいらっしゃいましたら、アドバイスいただけますと幸いです。

エラーの内容は以下です。
I, [2016-10-16T18:48:24.812868 #1870] INFO -- : [aa6a74fd-b012-40b0-bdd4-446a6a8386a3] Rendered vendor/bundle/ruby/2.3.0/bundler/gems/activeadmin-c69ace35722c/app/views/active_admin/resource/edit.html.arb (44.8ms)
I, [2016-10-16T18:48:24.813108 #1870] INFO -- : [aa6a74fd-b012-40b0-bdd4-446a6a8386a3] Completed 500 Internal Server Error in 84ms (ActiveRecord: 24.2ms)
F, [2016-10-16T18:48:24.814246 #1870] FATAL -- : [aa6a74fd-b012-40b0-bdd4-446a6a8386a3]
F, [2016-10-16T18:48:24.814292 #1870] FATAL -- : [aa6a74fd-b012-40b0-bdd4-446a6a8386a3] ActionView::Template::Error (undefined method id' for nil:NilClass): F, [2016-10-16T18:48:24.814416 #1870] FATAL -- : [aa6a74fd-b012-40b0-bdd4-446a6a8386a3] 1: insert_tag renderer_for(:edit) F, [2016-10-16T18:48:24.814441 #1870] FATAL -- : [aa6a74fd-b012-40b0-bdd4-446a6a8386a3] F, [2016-10-16T18:48:24.814457 #1870] FATAL -- : [aa6a74fd-b012-40b0-bdd4-446a6a8386a3] app/admin/item.rb:24:in block (4 levels) in <top (required)>'
F, [2016-10-16T18:48:24.814471 #1870] FATAL -- : [aa6a74fd-b012-40b0-bdd4-446a6a8386a3] app/admin/item.rb:24:in block (3 levels) in <top (required)>' F, [2016-10-16T18:48:24.814484 #1870] FATAL -- : [aa6a74fd-b012-40b0-bdd4-446a6a8386a3] app/admin/item.rb:18:in block (2 levels) in <top (required)>'
I, [2016-10-16T18:48:24.817763 #1870] INFO -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] Started GET "/html/maintenance.html" for 114.158.190.135 at 2016-10-16 18:48:24 +0000
F, [2016-10-16T18:48:24.818488 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e]
F, [2016-10-16T18:48:24.818529 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] ActionController::RoutingError (No route matches [GET] "/html/maintenance.html"):
F, [2016-10-16T18:48:24.818556 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e]
F, [2016-10-16T18:48:24.818572 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/debug_exceptions.rb:53:in call' F, [2016-10-16T18:48:24.818586 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/show_exceptions.rb:31:in call'
F, [2016-10-16T18:48:24.818600 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/rack/logger.rb:36:in call_app' F, [2016-10-16T18:48:24.818613 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/rack/logger.rb:24:in block in call'
F, [2016-10-16T18:48:24.818625 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/tagged_logging.rb:70:in block in tagged' F, [2016-10-16T18:48:24.818638 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/tagged_logging.rb:26:in tagged'
F, [2016-10-16T18:48:24.818651 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/tagged_logging.rb:70:in tagged' F, [2016-10-16T18:48:24.818664 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/rack/logger.rb:24:in call'
F, [2016-10-16T18:48:24.818677 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/request_store-1.3.1/lib/request_store/middleware.rb:9:in call' F, [2016-10-16T18:48:24.818689 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/request_id.rb:24:in call'
F, [2016-10-16T18:48:24.818701 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/method_override.rb:22:in call' F, [2016-10-16T18:48:24.818722 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/runtime.rb:22:in call'
F, [2016-10-16T18:48:24.818737 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in call' F, [2016-10-16T18:48:24.818750 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/actionpack-5.0.0.1/lib/action_dispatch/middleware/executor.rb:12:in call'
F, [2016-10-16T18:48:24.818762 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/rack-2.0.1/lib/rack/sendfile.rb:111:in call' F, [2016-10-16T18:48:24.818774 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/railties-5.0.0.1/lib/rails/engine.rb:522:in call'
F, [2016-10-16T18:48:24.818787 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/unicorn-5.1.0/lib/unicorn/http_server.rb:562:in process_client' F, [2016-10-16T18:48:24.818841 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/unicorn-5.1.0/lib/unicorn/http_server.rb:658:in worker_loop'
F, [2016-10-16T18:48:24.818855 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/unicorn-5.1.0/lib/unicorn/http_server.rb:508:in spawn_missing_workers' F, [2016-10-16T18:48:24.818867 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/unicorn-5.1.0/lib/unicorn/http_server.rb:132:in start'
F, [2016-10-16T18:48:24.818880 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/gems/unicorn-5.1.0/bin/unicorn_rails:209:in <top (required)>' F, [2016-10-16T18:48:24.818892 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/bin/unicorn_rails:23:in load'
F, [2016-10-16T18:48:24.818904 #1870] FATAL -- : [5af707f4-e306-4acb-b808-7e9067b8b22e] vendor/bundle/ruby/2.3.0/bin/unicorn_rails:23:in `<main>'

Answer 1

 [2016-10-16T18:48:24.814292 #1870] FATAL -- : [aa6a74fd-b012-40b0-bdd4-446a6a8386a3] ActionView::Template::Error (undefined method id' for nil:NilClass): F

と出ているので、以下のc.category.idのc.categoryがnilになるパターンがあるのだと思います。
categoryを持たないchild_categoryが無いか、確認してみてください。

f.input :child_category, collection: ChildCategory.all.map { |c| [c.name, {"data-category" => c.category.id}]}

Comments

[Hello]

ありがとうございます。確認してみます！

[Hello]

本当に本当にありがとうございます。
ご指摘の通りでした。

stgにてですが、以前、誤操作によりcategoryの全削除をしてしまって、その時削除されたcategory.idがitemに付与されておりました。

とても勉強になりました。