如何呈现字符串的部分内容? [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，以便可以将其作为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个服务器错误.如果我仅使用普通的render，那么令人惊讶的是它可以工作.好吧，它只发回无法解析为Javascript的纯HTML.

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.

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

错误

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

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"

有效，但发送回纯HTML

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

推荐答案

好的，我明白了.我必须添加render json:.我以为我曾经尝试过，这给了我一个双重渲染错误.我想当您render_to_string时，可以有多个渲染器.

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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