ruby-on-rails - Render partial from ApplicationController

Question

I'm trying to implement an action which will be invoked when user submits a new comment via ajax. When the comment is saved single comment partial must return. But it seems that render doesn't work as expected from ApplicationController. It displays an error that the view is not found, but it is in place (100%). When I'm adding :partial parameter it works, but doesn't pass any variables (and I need them!). Here's the controller code:

class ApplicationController < ActionController::Base
  protect_from_forgery
  def comment
    comment = Comment.new({
      story_id: params[:story_id],
      content: params[:content]
    })
    if comment.save
      render 'shared/comments/comment', comment: comment
    else
      render nothing: true, status: 400
    end
  end
end

Answer 1

Try using this syntax:

render :partial => 'shared/comments/comment', :locals => { :comment => comment }