Rails 4 Nested_form在5個問題后刪除鏈接

Question

我正在使用一個嵌套表單的gem，其中有兩個字段，視圖為

<%= f.fields_for :round_questions do |question| %>
                          <%= question.label :question %>
                          <%= question.text_field :question %>
                              Rate the Answer</br></br>
                           <div class="star-questions" ></div>
                          <%= question.text_field :answer_rating, :class=> 'star-answer', :disabled=>true %>
                          <%= question.link_to_remove "Remove this Question" %>
                      <% end %>
                      <%= f.link_to_add "Add a Question", :round_questions,
                                        :class=> 'btn waves-effect waves-light btn-medium custom_btn_gray' %>

在控制器中

@interview_round = InterviewRound.where(id: params[:id]).first
    5.times {@interview_round.round_questions.build}
    respond_to do |format|
      format.js
    end

現在，當表單加載時，將出現5個問題，我只想在有人添加問題時才提供remove鏈接，但是此鏈接為所有問題提供remove鏈接，請告訴我如何解決這個問題？

Answer 1

嘗試像這樣給它

<%= question.link_to_remove "Remove this Question" if question.object.persisted? %>

Answer 2

您需要在顯示刪除鏈接時添加條件，如下所示：

<%= question.link_to_remove "Remove this Question" unless question.object.new_record? %>