Rails - 如何刷新页面而不重新加载它？ （更新） [英] Rails - How do I refresh a page without reloading it? (updated)

问题描述

这个问题是关于我在问我先前的问题后遇到的问题 Rails - 如何刷新页面而不重新加载？

已经搜索，但找不到解决方案。

我建立了一个函数，每次人们去那个页面时都会发出一个随机记录，但如果用户刷新页面，随机记录会再次改变。 p>

因此我已尝试使用Cookie

 ＃posts_controller.rb 
 
 def new 
 @random = cookies [：stuff] || = Stuff.random 
 end 
  

并在我的 posts / new 视图中调用 @ random.content 只有 Stuff 模型的内容，当我第一次去页面是好的，但当我刷新页面，它给我这个错误

 ＃< Stuff：0x0000010331ac00>的未定义方法'content'：String 
  

有办法解决这个问题吗？

谢谢！

----更新----

<％= show_random（@random）['content']％> 的 code>内部服务器错误预期为param'post'使用

$ h $（
$ b

 <％= f.hidden_​​field：stuff_id，：value => show_random（@random）[：id]％> 
  

stuff / new.html.erb b

 ＃app / views / stuff / new.html.erb 
 
<％= show_random（@random）[：content] ％> 
 
< div> 
<％= f.hidden_​​field：stuff_id，：value => show_random（@random）[：id]％>< br> 
< / div> 
  

但是当创建帖子而不满足验证时， / p>

 没有将Stuff隐式转换为字符串
 
提取的源代码（第2行）：
 
 1 
 2<％= show_random（@random）['title']％> 
  

我认为这与我在 Posts_controller.erb

请在下面查看我的 Posts_controller.erb

  def create 
 @post = current_user.posts.build（post_params）
如果@ post.save 
 flash [：success] =已成功创建！ 
 else 
 @random = Stuff.where（id：params [：post] [：stuff_id]）。first 
 render'new'
 end 
 end 
  

解决方案

所以一个新的Stuff实例被分配给两个cookie [：stuff]和@random，所以在@random的内容方法调用会很好。但是当你将一个对象存储到cookies [：stuff]中时，这个值会被rails自动转换为一个字符串。

第二次访问页面时， cookie [：stuff]不为空，并分配给@random变量。但是如前所述，cookie中的内容是一个字符串，因此调用字符串上的内容方法不能工作。

This question is about problems I ran into after asking my previous question Rails - How do I refresh a page without reloading it?

Have been googling but cannot find a solution.

I'm building a function that gives out a random record every time people go to that page but the random record will change again if the user refresh the page.

Therefore I have tried using cookies

#posts_controller.rb    

def new
  @random = cookies[:stuff] ||= Stuff.random
end

and call @random.content in my posts/new view since I want only the content of the Stuff model, when I go to the page for the first time is fine but when I refresh the page, it gives me this error

undefined method 'content' for "#<Stuff:0x0000010331ac00>":String

Is there a way to resolve this?

Thanks!

----Update----

I have fixed the content missing problem using <%= show_random(@random)['content'] %> and the Internal Server Error expected Hash (got Array) for param 'post'using

<%= f.hidden_field :stuff_id , :value => show_random(@random)[:id] %>

stuff/new.html.erb

# app/views/stuff/new.html.erb

<%= show_random(@random)[:content] %>

      <div>
        <%= f.hidden_field :stuff_id , :value => show_random(@random)[:id] %><br>
      </div> 

But when creating the Post without meeting the validation, it gives me

no implicit conversion of Stuff into String

Extracted source (around line #2):

1
2  <%= show_random(@random)['title'] %>

I think it has something to do with my create action in my Posts_controller.erb

Please have a look below of my Posts_controller.erb

  def create
    @post = current_user.posts.build(post_params)
    if @post.save
      flash[:success] = "Post created successfully!"
      else
      @random = Stuff.where(id: params[:post][:stuff_id]).first
      render 'new'
    end
  end

解决方案

The first time , as cookies[:stuff] is null, so a new Stuff instance is assigned to both cookies[:stuff] and @random, so the content method call on @random will be fine. But as you store an object into the cookies[:stuff], the value will be converted into a string by rails automatically.

The second time, you visit the page, the cookies[:stuff] is not empty, and is assigned to the @random variable. But as previous saying, the content inside the cookies is a string, so calling content method on a string can not work.

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