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我想用Rails 4和簡單的窗體來製作應用程序。Rails：嵌套屬性的編輯路徑
我有3個模型：project，project_question和project_answer。
的關聯是： Project.rb：
has_many :project_questions, dependent: :destroy#, through: :projects
accepts_nested_attributes_for :project_questions
項目問題：
belongs_to :project#, counter_cache: true
has_one :project_answer, dependent: :destroy
belongs_to :user
accepts_nested_attributes_for :project_answer
項目答案：
belongs_to :project_questions#, counter_cache: true
belongs_to :user
的路線是：
resources :projects do
resources :project_questions do
resources :project_answers
end
end
在我的項目問題查看部分，我嘗試顯示項目答案。如果項目創建者是當前用戶，我想放置一個鏈接來編輯答案。我已經嘗試了至少10個路徑變體，我仍然無法弄清楚如何鏈接到編輯project_answer路徑。
我的項目答案航線有：
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project_question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>
，我試圖弄清楚該生產線是：
<%= link_to 'Edit Answer', [@project_answer.project_question, @project_answer] %>
我試過這個是因爲我在http://blog.8thcolor.com/en/2011/08/nested-resources-with-independent-views-in-ruby-on-rails/找到了一個教程。雖然該博客中的編輯示例使用單獨的文件來解答我的答案，但我認爲也許改變對象的順序可能會有所幫助。它沒有。
我也曾嘗試：
<%= 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) %>
如何鏈接到項目答案編輯路徑時，認爲部分項目的問題裏面顯示項目的答案嗎？
我project_answer控制器具有：
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
我認爲這是在URL中的線索，當我點擊了鏈接，「編輯答案」顯示。該頁面本身是空白的。 url是唯一的project/id/project_question/id。我期待項目答案ID也在這一行。
我嘗試在包含項目答案的url欄中輸入一個url，並且出現路徑錯誤（即使答案顯示在我的顯示頁面上）。
我試圖在我的項目控制檯中找到答案。我得到的錯誤說：
p.project_questions.project_answers.find
NoMethodError: undefined method `project_answers' for #<ActiveRecord::Associations::CollectionProxy::ActiveRecord_Associations_CollectionProxy_ProjectQuestion:0x00000104382e08>
我已經嘗試過同樣的搜索沒有pluralised表名稱。
請把你的'project_questions_controller' – Pavan