嵌套字段-RoR-link_to_add_associations

Question

我正在以具有3个表的形式使用茧和嵌套字段，如此db方案所示：）我想添加一个新菜单，所以在menus / new.html.erb中，我有：

    <%= simple_form_for @menu do |f| %>
  <%= f.input :name, label: "name", label_method: :name, value_method: :id, include_blank: true %>

  <h3>Portions</h3>
  <div id='portions'>
    <%= f.simple_fields_for :portions do |portion| %>
      <%= render 'portion_fields', :f => portion %>
    <% end %>
    <div class='links'>
      <%= link_to_add_association 'add portion', f, :portions %>
    </div>
  </div>
  <%= f.submit 'valider' %>
<% end %>

在我的部分中为_portion_fields.html.erb的嵌套字段：

<div class='nested-fields'>
    <%= f.association :aliment, label: "Intitulé de l'aliment", label_method: :label, value_method: :id, include_blank: true %>
    <%= f.input :portion_qty, label: "Qté", placeholder:"portions", as: :integer %>
    <%= link_to_remove_association "remove portion", f %>
</div>

和我的模特：

  class Menu < ApplicationRecord
  has_many :portions, dependent: :destroy
  has_many :aliments, through: :portions, dependent: :destroy

  accepts_nested_attributes_for :portions, reject_if: :all_blank, allow_destroy: true
end



 class Aliment < ApplicationRecord
  has_many :portions
  has_many :menus, through: :portions, dependent: :destroy
end

    class Portion < ApplicationRecord
  belongs_to :aliment, foreign_key: :aliment_id
  belongs_to :menu, foreign_key: :menu_id
end

错误告诉我：

Answer 1

[link_to_remove_association助手（Cocoon::ViewHelpers）”是从cocoon railtie加载到应用程序启动的，如果您在安装gem后没有重新启动应用程序服务器，则可能会发生此错误（请确保也执行spring stop）。