Ruby on rails Rails：编辑嵌套属性的路径

我正在尝试用Rails 4和简单的表单制作一个应用程序

我有3个模型：项目、项目问题和项目答案

这些协会是： Project.rb：

  has_many :project_questions, dependent: :destroy#, through: :projects
  accepts_nested_attributes_for :project_questions

项目问题：

belongs_to :project#, counter_cache: true
  has_one :project_answer, dependent: :destroy
  belongs_to :user
  accepts_nested_attributes_for :project_answer

项目答复：

  belongs_to :project_questions#, counter_cache: true
  belongs_to :user

路线为：

  resources :projects do
    resources :project_questions do
      resources :project_answers
    end
  end

在我的项目问题视图部分中，我尝试显示项目答案。如果项目创建者是当前用户，我想放置一个链接来编辑答案。我已经尝试了至少10种不同的路径，但我仍然不知道如何链接到编辑项目路径

我的项目回答路线是：

project_project_question_project_answers GET      /projects/:project_id/project_questions/:project_question_id/project_answers(.:format)          project_answers#index
                                              POST     /projects/:project_id/project_questions/:project_question_id/project_answers(.:format)          project_answers#create
  new_project_project_question_project_answer GET      /projects/:project_id/project_questions/:project_question_id/project_answers/new(.:format)      project_answers#new
 edit_project_project_question_project_answer GET      /projects/:project_id/project_questions/:project_question_id/project_answers/:id/edit(.:format) project_answers#edit
      project_project_question_project_answer GET      /projects/:project_id/project_questions/:project_question_id/project_answers/:id(.:format)      project_answers#show
                                              PATCH    /projects/:project_id/project_questions/:project_question_id/project_answers/:id(.:format)      project_answers#update
                                              PUT      /projects/:project_id/project_questions/:project_question_id/project_answers/:id(.:format)      project_answers#update
                                              DELETE   /projects/:project_id/project_questions/:project_question_id/project_answers/:id(.:format)      project_answers#destroy

我的项目问题部分是：

<div class="containerfluid">
  <div class="row">
    <div class="col-md-12">
      <% @project.project_questions.each do |singleQuestion| %>

          <div class="categorytitle">
            <%= singleQuestion.title %>

          </div>
          <div class="generaltext">
            <%= singleQuestion.try(:content) %>
          </div>
          <span class="editproject">
            <% if current_user.id == @project.creator_id && singleQuestion.project_answer.try(:answer).blank? %>

                <%= link_to 'Answer this question', new_project_project_question_project_answer_path(:project_id => @project.id, :project_question_id => singleQuestion.id) %>
                <% elsif  %>
                   <% if current_user.id == @project.creator_id  %>

                      <div class="datasubtextq">
                        <%=singleQuestion.project_answer.try(:answer) %>
                        <span class="editproject">
                          <%= link_to 'Edit Answer', [@project_answer.project_question, @project_answer] %>
                        </span>

                      </div>

                <% else  %>
                    <div class="datasubtextq">
                      <%=singleQuestion.project_answer.try(:answer) %>

                    </div>
            <% end %>
                            <% end %>

          </span>
      <% end %>

    </div>
  </div>
</div>

@project.id，：project\u question\u id=>singleQuestion.id）%>

我想说的是：

  <%= link_to 'Edit Answer', [@project_answer.project_question, @project_answer] %>

我尝试了这个，因为我在以下位置找到了一个教程：。虽然该博客中的编辑示例使用了一个单独的文件作为我的等效答案，但我认为更改对象的顺序可能会有所帮助。没有

我也尝试过：

                      <%= link_to 'Edit Answer',[@project_answer.singleQuestion, @project_answer] %>

                      <%= link_to 'Edit Answer', edit_project_project_question_project_answer_path(@project_answer.singleQuestion, @project_answer) %>

                      <%= link_to 'Edit Answer', edit_project_project_question_project_answer_path(@singleQuestion.project_answer, @project_answer) %>
                      <%= link_to 'Edit Answer', edit_project_project_question_project_answer_path(@project_answer.project_question, @project_answer) %>

当项目答案显示在项目问题的部分视图中时，如何链接到项目答案的编辑路径

我的项目回答控制器有：

class ProjectAnswersController < ApplicationController
  before_action :set_project
  before_action :set_project_question
  before_action :set_project_answer, only: [:show, :edit, :update, :destroy]


  # GET /project_answers
  # GET /project_answers.json
  def index
    @project_answers = ProjectAnswer.all
  end

  # GET /project_answers/1
  # GET /project_answers/1.json
  def show
  end

  # GET /project_answers/new


  def new
    @project_answer = @project_question.build_project_answer
  end

  # GET /project_answers/1/edit
  def edit
  end

  # POST /project_answers
  # POST /project_answers.json
  def create
    @project_answer = @project_question.build_project_answer(project_answer_params)


    respond_to do |format|
      if @project_answer.save
        format.html { redirect_to @project, notice: 'Project answer was successfully created.' }
        format.json { render action: 'show', status: :created, location: @project_answer }
      else
        format.html { render action: 'new' }
        format.json { render json: @project_answer.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /project_answers/1
  # PATCH/PUT /project_answers/1.json
  def update
    respond_to do |format|
      if @project_answer.update(project_answer_params)
        format.html { redirect_to @project_answer, notice: 'Project answer was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: 'edit' }
        format.json { render json: @project_answer.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /project_answers/1
  # DELETE /project_answers/1.json
  def destroy
    @project_answer.destroy
    respond_to do |format|
      format.html { redirect_to project_answers_url }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.

    def set_project
      @project = Project.find(params[:project_id])
    end

    def set_project_question
      @project_question = @project.project_questions.find(params[:project_question_id])
    end


  def set_project_answer
      @project_answer = ProjectAnswer.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def project_answer_params
      params[:project_answer].permit(:answer, :project_question_id, :id)
    end
end

class ProjectAnswersController

我想当我点击“编辑答案”链接时，显示的url中有一条线索。页面本身是白色的。url仅为project/id/project\u question/id。我希望项目答案id也在这一行

我尝试在包含项目答案的url栏中键入一个url，结果发现一个路由错误（即使答案显示在我的显示页面上）

我试图在我的项目控制台中找到答案。我得到的错误是：

p.project_questions.project_answers.find
NoMethodError: undefined method `project_answers' for #<ActiveRecord::Associations::CollectionProxy::ActiveRecord_Associations_CollectionProxy_ProjectQuestion:0x00000104382e08>

p.project\u questions.project\u answers.find
命名错误：未定义的“项目答案”方法#

我尝试过同样的搜索，但没有使用多元化的表名

edit_project_project_question_project_answer GET  /projects/:project_id/project_questions/:project_question_id/project_answers/:id/edit(.:format) project_answers#edit

您还必须为

：project\u id

赋值才能使链接正常工作

这应该行得通

<%= link_to 'Edit Answer', edit_project_project_question_project_answer_path(@project, singleQuestion, @project_answer) %>

---

您没有在表单中定义@project\u answer变量，因此无法使用它

你应该使用

<%= link_to 'Edit Answer', edit_project_project_question_project_answer_path(@project, singleQuestion, singleQuestion.project_answer) %>

请发布您的

项目\u问题\u控制器

链接正常，但没有指向答案partial@user2860931它把你带到哪里去了？只是一个空白的白页，没有应用程序布局或任何东西。怪怪的。@user2860931我的错。更新了我的答案。这也变成了一个空白页，使用相同的URL嗨，史蒂夫，我尝试了这个，但我得到了相同的结果。空白白页的URL也只是：（没有参考项目答案）是否存在答案？如果不是，你应该调用新路径而不是编辑路径。嗨，Steve，是的，答案存在。我在试着编辑它，我在想也许它没有，尽管我们认为它有。如果将

更改为

，是否会在渲染时出错？另外，在控制器中，尝试将set_project_question更改为@project_question=ProjectQuestion.find（params[：project_question_id]）嗨，史蒂夫，奇怪的是，更改了(