Rails Cocoon Gem：未在另一个字段中呈现的值的字段

Question

我使用the Cocoon Gem添加卡片：

<%= f.fields_for :cards do |card_fields| %>
                                <% if @there_is_card %>
                                    <%= card_fields.object.buttons.build %>
                                    <%= render 'card_fields_render', f: card_fields %>
                                <% end %>
                            <% end %>

在card_fields_render部分内容中，我有另一个字段可以向卡添加（或不添加）按钮：

...
<%= f.fields_for :buttons do |button_card_fields| %>
      <div class="add-button-card-modal">
        <h4>Add New Button</h4>
        <label>Button Text</label>
        <%= button_card_fields.text_field :button_text, :maxlength => 20, placeholder: "Enter the text to display on the button..." %>
        <br><br>
        <label>Button URL</label>
        <%= button_card_fields.text_field :button_url, placeholder: "Paste URL..." %>
        <div class="nav-popups-buttons">
          <button type="button" id="validate_new_card_button" class="small-cta2">Add Button</button>
          <p class="remove-link" id="delete_new_card_button">Remove Button</p>
        </div>
      </div>
    <% end %>
...

不幸的是，当使用按钮呈现卡片时，button_text和button_url字段的值不会显示。

我尝试添加f.object.buttons.build，但它无法解决问题。

卡片型号：

class Card < ApplicationRecord
  validates :remote_image_url, :format => URI::regexp(%w(http https)), presence: { message: '%{value} : please enter valid url' }, :allow_blank => true
  validates :title, :subtitle, :presence => true

  belongs_to :letter, optional: true
  has_many :buttons, dependent: :destroy, inverse_of: :card
  has_many :analytic_clics, dependent: :destroy

  accepts_nested_attributes_for :buttons, :reject_if => Proc.new { |att| att[:button_text].blank? && att[:button_url].blank? }, allow_destroy: true
end

按钮型号：

class Button < ApplicationRecord
  validates :button_url, :format => URI::regexp(%w(http https)), presence: { message: '%{value} : please enter valid url' },
    unless: Proc.new { |a| a.button_url.blank? }
  validates :button_text, :presence => true, unless: Proc.new { |a| a.button_url.blank? }

  belongs_to :message, optional: true
  belongs_to :card, optional: true
  has_one :short_url, dependent: :destroy
  has_many :analytic_clics, dependent: :destroy
end

控制器中的Letter params：

def letter_params
      params.require(:letter).permit(:campaign_name, :core_bot_id, :nb_recipients, :scheduled_at,
        filters_attributes: [:id, :gender, :creation_date_start, :creation_date_finish, :first_name, :last_name, :segment => [], :timezone => [], :locale => []],
        messages_attributes: [:id, :content, :_destroy, buttons_attributes: [:id, :button_text, :button_url, :_destroy]],
        cards_attributes: [:id, :title, :subtitle, :image_url, :remote_image_url, :button_share, :_destroy, buttons_attributes: [:id, :button_text, :button_url, :_destroy]])
    end

知道问题是什么吗？也许我应该使用Cocoon的link_to_add_association添加按钮？问题是它将在用于添加卡的link_to_add_association的容器中，从而为回调创建问题（调用两次）......

Answer 1

我删除了card_fields.object.buttons.build，现在可以了。它生成了两次按钮字段，隐藏了填充值的字段。