如何呈现字符串的部分? [英] How do I render a partial to a string?

问题描述

如何呈现字符串的部分内容，以便将其作为 JSON 响应的一部分包含在内?我必须将其放入 JSON 响应中，以便为可能的错误消息留出空间.以下代码给出了 500 服务器错误.如果我只使用普通的 render，那么令人惊讶的是它可以工作.好吧，它只发送回无法解析为 Javascript 的纯 HTML.

代码

respond_to do |format|format.html { redirect_to post_path(post) }格式.js {{错误: ""，内容:(render_to_string 部分:'/comments/comment'，本地人:{comment:comment}，布局:false)}}结尾

错误

<块引用>

模板丢失缺少模板注释/创建，应用程序/创建 {:locale=>[:en], :formats=>[:js, :html], :handlers=>[:erb, :builder, :raw, :ruby, :jbuilder，:haml]}.搜索: * "C:/Users/Chloe/workspace/project/app/views"

有效，但发回纯 HTML

render partial: '/comments/comment', locals: {comment: comment}, layout: false

解决方案

好的，我明白了.我必须添加 render json:.我以为我以前试过，它给了我一个双重渲染错误.我想当你 render_to_string 时，有不止一个渲染就可以了.

respond_to do |format|format.html { redirect_to post_path(post) }格式.js {渲染json:{错误:闪光[:错误]，内容:(render_to_string 部分:'/comments/comment'，本地人:{comment:comment}，布局:false)}}结尾

How do I render a partial to a string, so I can include it as part of a JSON response? I have to put it into a JSON response to allow room for a possible error message. The following code gives a 500 server error. If I use just a plain render, then surprisingly it works. Well, it send back just plain HTML which cannot be parsed as Javascript.

Code

respond_to do |format|
   format.html { redirect_to post_path(post) }
   format.js { 
     { 
       error: "",
       content: (render_to_string partial: '/comments/comment', locals: {comment: comment}, layout: false )  
     } 
   }
end

Error

Template is missing Missing template comments/create, application/create with {:locale=>[:en], :formats=>[:js, :html], :handlers=>[:erb, :builder, :raw, :ruby, :jbuilder, :haml]}. Searched in: * "C:/Users/Chloe/workspace/project/app/views"

Works, but send back plain HTML

render partial: '/comments/comment', locals: {comment: comment}, layout: false

解决方案

Ok I got it. I had to add render json:. I thought I had tried that before and it gave me a double render error. I guess when you render_to_string, then it's ok to have more than one render.

respond_to do |format|
   format.html { redirect_to post_path(post) }
   format.js { 
     render json: { 
       error: flash[:error],
       content: (render_to_string partial: '/comments/comment', locals: {comment: comment}, layout: false )  
     } 
   }
end

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