[Ruby on Rails4] f.fields_forが表示されない

Question

Nested Form Gemを使って、formを作成しています。
なのですが、 f.fields_forがうまく表示されず困っています。
なにかアドバイスをください。

= nested_form_for(@article, url: admin_articles_path, multiple: true) do |f|
  .form-group
    = f.label :title, "タイトル"
    = f.text_field :title, class: "form-control"
  .form-group.main-image-box
    = f.label :main_image, "メイン画像"
    = f.file_field :main_image, multiple: true
    = image_tag("", class: "main-image")
  .form-group
    = f.label :description, "記事の説明"
    = f.text_area :description, class: "form-control"
  .form-group.article_chapter
    = f.fields_for :article_chapter_blocks do |article_chapter_blocks_form|
      = render "article_chapter_block", f: article_chapter_blocks_form
    = f.link_to_add "追加", :article_chapter_blocks,data: {target: ".article_chapter"}

  = submit_tag "登録", class: "btn btn-default"

_article_chapter_block.html.slim

= f.link_to_remove "このブロックを削除"
.form-group
  = f.label :description, "大見出し"
  = f.text_field :title, class: "form-control"
.form-group
  = f.fields_for :article_chapter_text_parts do |article_chapter_text_parts_form|
    = render "article_chapter_text_parts", f: article_chapter_text_parts_form

_article_chapter_text_parts.html.slim

= f.label :title, "小見出し"
= f.text_field :title, class: "form-control"
= f.label :content, "内容"
= f.text_area :content, class: "form-control"
= f.link_to_remove "削除"

モデル

class Article < ActiveRecord::Base
  has_many :article_chapter_blocks

  accepts_nested_attributes_for :article_chapter_blocks, allow_destroy: true
  #carrierwave
  mount_uploader :main_image, AriticleImageUploader
end

class ArticleChapterBlock < ActiveRecord::Base
  belongs_to :article

  has_many :article_chapter_text_parts
  accepts_nested_attributes_for :article_chapter_text_parts, allow_destroy: true
end

class ArticleChapterTextPart < ActiveRecord::Base
  belongs_to :article_chapter_block
end

何時間も考えて解決できなかったのでよろしくお願いします。

Answer 1

私の勘違いでした。すいません。