ruby-on-rails – 如何将锚添加到redirect_to：back

def vote
  # voting logic goes here
  redirect_to :back
end

这会将我重定向到正确的页面,但我想重定向到页面中的特定帖子.为此,我在帖子部分div中添加了一个识别锚点.

<div id="post_<%= post.id %>">
  <%= post.content %>
</div>

我怎样才能在redirect_to中引用它：返回？我尝试了以下,这是行不通的.

# this doesn't work!
redirect_to :back,anchor: "post_#{@post.id}"

或者,如果我对show和index视图使用if子句,我该怎么做？我尝试了下面的内容,它为VocabsController返回未定义的方法’current_page’.

#this doesn't work!
if current_page?(posts_path)
  redirect_to posts_path(anchor: "post_#{@post.id}"
else
  redirect_to @post
end