Rails 3 -呈现部分和错误“未定义的局部变量或方法”

I have a photos in gallery (PhotosController) and I wanna add to every photo a comments. Into the statement of photos I added a partial for rendering comments + form for adding new comment.

我在图片库(PhotosController)有一张照片，我想给每张照片添加一个评论。在photos语句中，我添加了一个用于呈现注释的部分+用于添加新注释的表单。

My problem is, that when I send the form with a new comment, so I'll get the rendering error:

我的问题是，当我用新的注释发送表单时，我将得到呈现错误:

**NameError (undefined local variable or method `photo' for #<CommentsController:0x00000100ce0ad0>)**:

This is how looks my code:

我的代码是这样的:

views/photos/index.html.erb

视图/照片/ index.html.erb

<%= render @photos %>

views/photos/_photo.html.erb

视图/照片/ _photo.html.erb

<div><%=image_tag photo.photo.url(:thumb)%></div>
<div class="comments_to_photo">
  <%= render :partial => 'photos/photo_comments', :locals => { :photo => photo }%>
</div>

photos/photo_comments

照片/ photo_comments

<%photo.comments.each do |cmnt|%>
  <div><%=cmnt.comment%></div>
<%end%> 

<%=form_tag comment_path, :remote => true do %>
  <div><%=text_area_tag 'comment[comment]'%></div>
  <%=submit_tag%>
<%end%>

controllers/CommentsController

控制器/ CommentsController

  def create
    @comment = Comment.new(params[:comment])

    respond_to do |format|
      if @comment.save
        format.html { redirect_to @comment, notice: 'Comment was successfully created.' }
        format.js {
          render :partial => '/photos/photo_comments', :locals => { :photo => photo } do |page|; page << "$(this).html('abcde');" end  
        }
      else
        format.html { render action: "new" }
        format.js
      end
    end
  end

I would like to refresh the form and comments statement in the photo, where was added a comment. Could anyone help me, please, how to avoid the error above?

我想刷新一下照片中的表单和comments语句，其中添加了注释。请问有谁可以帮助我，如何避免上面的错误?

Thank you in advance

提前谢谢你

EDIT: I added for refresh comments through AJAX the file _photo_comments.js.erb:

编辑:我通过AJAX添加了文件_photo_comments.js.erb:

$('#photo_comment').html("<%= escape_javascript(render('photos/photo_comments')) %>");

And I get the error

得到误差

ActionView::Template::Error (stack level too deep):
  activesupport (3.2.1) lib/active_support/notifications/instrumenter.rb:23

with tens of this line:

有几十条这样的线:

  Rendered photos/_photo_comments.js.erb (562.2ms)

and the last one

最后一个

Completed 500 Internal Server Error in 580ms

What's wrong with rendering? I can't render partial html file from partial JS file?

呈现怎么了?我不能从部分JS文件渲染部分html文件?

2 个解决方案

#1

In your controller you have:

在控制器中你有:

:locals => { :photo => photo }

but the variable photo doesn't exist there. It should be:

但是变量photo并不存在。应该是:

:locals => { :photo => @comment.photo }

#2

image_tag photo.photo.url(:thumb) <- Is it what you want to have photo.photo ?

image_tag photo.photo.url(:thumb) <-这是你想要的照片吗?照片吗?

#1