在使用AJAX的Rails 4中，如何成功更新特定的div？

Question

I have a bunch of images and when I upload another using AJAX, I need to refresh the div that the images are held in. In Rails 3.2 I used to be able to use a partial and render_to_string in the controller and send JSON back with the new html, but that method does not seem to work in Rails 4.

I have a partial called images.html.haml that needs a local variable 'user'

I have a controller that uses the following:

respond_to do |format|
  html = render_to_string('_images.html.haml', locals => {'user' => user}) 
  format.json {render :json => {:html => html} }
end

However, when I use this method, not only the partial, but the partial within the application layout gets rendered. I did some searching to find that there is now a :partial key, so I tried that but then Rails couldn't find the partial. Is there a better way to do this that is supported by Rails 4?

Answer 1

这应该为您工作：

html = render_to_string(partial: 'images', locals: {user: user})

Answer 2

您可以尝试一下，让我知道是否可行吗？

render_to_string(:partial => '_images.html.haml', :locals => {'user' => user}, :layout => false)