图片测试：

表情测试：
:bowtie:

代码测试：

puts "Hello world!"

# coding: utf-8
class CommentsController < ApplicationController
  before_filter :require_user

  def create
    @comment = Comment.new(comment_params)
    @comment.user = current_user
    @success = @comment.save
  end

  def comment_params
    params.require(:comment).permit(:commentable_type, :commentable_id, :body)
  end
end

AT 测试:

@seveniruby

加精测试