Ruby on rails 未定义的方法错误-单表继承-路由错误

我正在创建一个单表继承模型来构建一个注释线程，我遇到了一个令人困惑的路由错误

我已设置了我的模型

class Question < ApplicationRecord
  has_many :answers, class_name: 'Questions::Answer'
end

class Answer < ApplicationRecord
  has_many :answers, class_name: 'Answers::Answer'
end

在我看来，我提供了答案和一个表单来添加答案

<%= render @answers %></br>
<%= render "answers/form" %>

但是，这给了我一个未定义的方法错误：

未定义的方法'questions\u answers\u path'

在我的道路上，唯一的道路是

question_answers     GET    /questions/:question_id/answers(.:format)       answers#index
                     POST   /questions/:question_id/answers(.:format)       answers#create
new_question_answer  GET    /questions/:question_id/answers/new(.:format)   answers#new
edit_answer          GET    /answers/:id/edit(.:format)                     answers#edit
answer               GET    /answers/:id(.:format)                          answers#show         
                     PATCH  /answers/:id(.:format)                          answers#update       
                     PUT    /answers/:id(.:format)                          answers#update       
                     DELETE /answers/:id(.:format)                          answers#destroy

然后问题是，为什么它要寻找复数的

疑问词\u答案\u路径

，

而不是疑问词\u答案\u路径

形式相对标准：

<%= simple_form_for(@answer) do |f| %>
  <%= f.error_notification %>
  <%= f.error_notification message: f.object.errors[:base].to_sentence if f.object.errors[:base].present? %>

  <div class="form-inputs">
  <%= f.input :body %>
  </div>

  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

---

您必须给出显式路径的原因很明显：因为您构建了类

Questions:：answer

的答案，而

的
简单表单只能从表单对象的类派生路径。但这是一个非正统的解决方案，用于解决线程化答案问题。为什么要用这种方式来解决问题，而不是使用指向父对象的自引用链接？我最初尝试了指向父对象的自引用链接，但无法将答案呈现在特定答案下方的正确位置。我向StackOverflow寻求帮助，并被建议使用自表继承重新建模问题。在做了一些研究之后，它似乎更适合，但正如你所看到的，我遇到了一些问题。您知道为什么即使在我更改路径后表单验证仍会抛出错误吗？
 def show
    @answer = @question.answers.new
    @answers = @question.answers.page(params[:page]).per(5)
 end

question_answers     GET    /questions/:question_id/answers(.:format)       answers#index
                     POST   /questions/:question_id/answers(.:format)       answers#create
new_question_answer  GET    /questions/:question_id/answers/new(.:format)   answers#new
edit_answer          GET    /answers/:id/edit(.:format)                     answers#edit
answer               GET    /answers/:id(.:format)                          answers#show         
                     PATCH  /answers/:id(.:format)                          answers#update       
                     PUT    /answers/:id(.:format)                          answers#update       
                     DELETE /answers/:id(.:format)                          answers#destroy

<%= simple_form_for(@answer) do |f| %>
  <%= f.error_notification %>
  <%= f.error_notification message: f.object.errors[:base].to_sentence if f.object.errors[:base].present? %>

  <div class="form-inputs">
  <%= f.input :body %>
  </div>

  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

class AnswersController < ApplicationController
  before_action :set_answer, only: [:edit, :update, :destroy]
  before_action :set_question

  def create
    @answer = @question.answers.build(answer_params)

    respond_to do |format|
      if @answer.save
        format.html { redirect_to question_path(@question) }
        format.json { render :show, status: :created, location: @answer }
      else
        format.html { render :new }
        format.json { render json: @answer.errors, status: :unprocessable_entity }
      end
    end
  end

  def update
    authorize @answer
    respond_to do |format|
      if @answer.update(answer_params)
        format.html { redirect_to question_answers_path(@question), notice: 'Answer was successfully updated.' }
        format.json { render :show, status: :ok, location: @answer }
      else
        format.html { render :edit }
        format.json { render json: @answer.errors, status: :unprocessable_entity }
      end
    end
  end

  def destroy
    authorize @answer
    @answer = Answers.find(params[:id])
    @answer.discard
    respond_to do |format|
      format.html { redirect_to question_answers_path(@question), notice: 'Answer was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    def set_answer
      @answer = Answer.find(params[:id])
    end

    def answer_params
      params.fetch(:answer, {}).permit(:body, :type).merge(user_id: current_user.id, question_id: @question.id)
    end

    def set_question
      @question = Question.find(params[:question_id])
    end

end