Question

我正在尝试创建一个基于会话值呈现特定视图的应用程序。但是，我无法存储会话值。

我的控制器是这样的：

class MyController < ApplicationController
  def question
    if session[:state].nil?
      session[:state] = 'question_one'
    end
  end

  def next_page
    # state pattern would be much better, this is a bit ugly
    if session[:state].nil? || session[:state] == 'question_one'
      session[:state] = 'question_two'
    elsif session[:state] == 'question_two'
      session[:state] = 'question_one'
    end
  end
end

我的观点是这样的（名为question.html.erb）：

<h1>Question</h1>

<div align="center">
    <% if (session[:state]).to_s == 'question_one' %>
        <%= render partial: 'layouts/question_one' %>
    <% else %>
        <%= render partial: 'layouts/question_two' %>
    <% end %>
</div>

<div class="buttons">
    <%= link_to "Next", question_path, class: "btn btn-large btn-primary" %>
</div>

在routes.rb中，question_path被定义为：

resources :question do
    collection do
        get :next_page
    end
end

但是，session[:state]总是Nil，为什么？

注意：这个问题纯粹是关于Ruby on Rails的工作方式，我已经省略了网站本身的大部分细节，只留下了与问题相关的内容。

Answer 1

不确定您是如何触发next_page_path但是提供您给出的信息可以在问题路径中设置param [：state]并根据该设置设置会话。

 def question
  # session[:state] = 'semantic_recognition_state'
  # not sure why you are setting 'semantice_recognition_state' 

  if params[:state].nil? && session[:state].nil?
    session[:state] = 'question_one'
  elsif params[:state].nil? && session[:state].present?
    session[:state]
  else 
    session[:state] = params[:state]
  end
end


<div class="buttons">
  <%= link_to "Next", question_path(state: 'question_two'), class: "btn btn-large btn-primary" %>
  <%= link_to "Back", question_path(state: 'question_one'), class: "btn btn-large btn-primary" %>
</div>

无法获得会话值

1 个答案: