Question

我尝试链接以在我的rails应用中添加编辑测验链接，但我收到此错误：

No route matches {:action=>"edit", :controller=>"quiz_bs", :id=>nil} missing required keys: [:id]

我查看了类似的帖子（like this one），但他们的答案似乎并没有解决问题，即使他们提出了类似的情况。

我的application.html.erb代码的这一行显示错误：

  <li>
    <% if @user.quiz_bs == nil %>
       <%= link_to "Body Structure Quiz", quiz_bs_path %>
    <% else %>
       <%= link_to "Body Structure Quiz ✓", edit_quiz_b_path(id: @user.quiz_bs) %>
    <% end %>
  </li>

但链接也会出现在我的展会用户页面上：

  <h4>Body Structure</h4>
  <% if @user.quiz_bs == nil %>
    <p><%= link_to "Test Your Body Structure", new_quiz_b_path %></p>
  <% else %>
    <h3><%= @user.quiz_bs.bscode %></h3>
    <p><%= link_to "Retest Results", edit_quiz_b_path(id: @quiz_bs.id) %></p>
  <% end %>

这是我的quiz_bs_controller：

class QuizBsController < ApplicationController
before_action :require_sign_in

def show
  @quiz_bs = QuizBs.find(params[:id])
end

def new
  @quiz_bs = current_user.quiz_bs || current_user.build_quiz_bs
end

def create
  @quiz_bs = QuizBs.new

  @quiz_bs.bs01 = params[:quiz_bs][:bs01]
  @quiz_bs.bs02 = params[:quiz_bs][:bs02]
  @quiz_bs.bs03 = params[:quiz_bs][:bs03]
  @quiz_bs.bs04 = params[:quiz_bs][:bs04]
  @quiz_bs.bs05 = params[:quiz_bs][:bs05]
  @quiz_bs.bs06 = params[:quiz_bs][:bs06]

  @quiz_bs.user = current_user

if @quiz_bs.save
  flash[:notice] = "Quiz results saved successfully."
  redirect_to user_path(current_user)
else
  flash[:alert] = "Sorry, your quiz results failed to save."
  redirect_to welcome_index_path
end
end

def edit
@quiz_bs = QuizBs.find(params[:id])

@quiz_bs.assign_attributes(quiz_bs_params)

if @quiz_bs.save
  flash[:notice] = "Post was updated successfully."
  redirect_to user_path(current_user)
else
  flash.now[:alert] = "There was an error saving the post. Please try again."
  redirect_to welcome_index_path
end
end

def update
@quiz_bs = QuizBs.find(params[:id])

@quiz_bs.assign_attributes(quiz_bs_params)

if @quiz_bs.save
  flash[:notice] = "Post was updated successfully."
  redirect_to user_path(current_user)
else
  flash.now[:alert] = "There was an error saving the post. Please try again."
  redirect_to welcome_index_path
end
end

private
def quiz_bs_params
params.permit(:bs01, :bs02, :bs03, :bs04, :bs05, :bs06)
end

end

相应的路线是：

        quiz_bs GET    /quiz_bs(.:format)             quiz_bs#index
                POST   /quiz_bs(.:format)             quiz_bs#create
     new_quiz_b GET    /quiz_bs/new(.:format)         quiz_bs#new
    edit_quiz_b GET    /quiz_bs/:id/edit(.:format)    quiz_bs#edit
         quiz_b GET    /quiz_bs/:id(.:format)         quiz_bs#show
                PATCH  /quiz_bs/:id(.:format)         quiz_bs#update
                PUT    /quiz_bs/:id(.:format)         quiz_bs#update

如果有任何帮助可以解决这个问题，我将非常感激！

Answer 1

在application.html.erb中，更改为：

  <li>
    <% if current_user.quiz_bs.nil? %>
       <%= link_to "Body Structure Quiz", quiz_bs_path %>
    <% else %>
       <%= link_to "Body Structure Quiz ✓", edit_quiz_b_path(current_user.quiz_bs) %>
    <% end %>
  </li>

我们希望将@user更改为current_user，因为此视图是整个网站的模板。无法保证@user将成为每个控制器中的全局变量（并且这可能不是您想要的）。使用current_user方法始终可用，并为您登录用户。
注意：此处id:不是必需的，传递的模型将用作id。

在users/show.html.erb中，更改为：

  <h4>Body Structure</h4>
  <% if @user.quiz_bs == nil %>
    <p><%= link_to "Test Your Body Structure", new_quiz_b_path %></p>
  <% else %>
    <h3><%= @user.quiz_bs.bscode %></h3>
    <p><%= link_to "Retest Results", edit_quiz_b_path(@user.quiz_bs) %></p>
  <% end %>

@quiz_b是您在users_controller中未定义的变量，就像您在quiz_bs_controller中所做的那样。您正在访问@user.quiz_bs，因此您希望链接到代码中的特定实例。

全局@quiz_b仅适用于已定义此变量的网页，该变量可以是quiz_b路径下的任何网页。

最后，在quiz_bs_controller：

def quiz_bs_params
  params.require(:quiz_bs).permit(:bs01, :bs02, :bs03, :bs04, :bs05, :bs06)
end

将此方法与声明为：

的表单结合使用时

<%= form_for @quiz_bs do |f| %>

您需要:quiz_bs中的params，以便将参数范围限定为表单中正在编辑的模型;在这种情况下，@quiz_bs。否则，更新/创建测验时不会找到任何变量。

Answer 2

这是你的问题：

No route matches {:action=>"edit", :controller=>"quiz_bs", :id=>nil} missing required keys: [:id]

您必须将编辑操作传递给ID，它是路由结构的一部分。在您的路线输出中，它甚至会向您显示：

/quiz_bs/:id/edit

没有该id，/：id / edit路由根本不起作用 - 这是一个Rails机制。

在你的Gemfile中：

group :development do
  gem 'pry-rails'
end

和

bundle install

然后在你的application.html.erb以上的逻辑中执行：

<% binding.pry %>
<% if @user.quiz_bs == nil %>
    <p><%= link_to "Test Your Body Structure", new_quiz_b_path %></p>
<% else %>
    <h3><%= @user.quiz_bs.bscode %></h3>
    <p><%= link_to "Retest Results", edit_quiz_b_path(id: @quiz_bs.id) %></p>
<% end %>

现在再次点击页面。 Pry将生成一个调试断点，允许您评估服务器当前运行的终端中的@user对象。我最好的建议是学会调试自己的代码 - 这是一种情况，如果没有提供对应用程序的访问权限，就无法提供很多上下文。

没有路由匹配{：action =＆gt;＆＃34;编辑＆＃34;，：controller =＆gt;＆＃34; quiz_bs＆＃34;，：id =＆gt; nil}缺少必需的密钥：[：id]

2 个答案: