Ruby on Rails：如果帖子没有保存，我将如何留在同一页面？

def create
    @addpost = Post.new params[:data]
    if @addpost.save
        flash[:notice] = "Post has been saved successfully."
        redirect_to posts_path
    else
        flash[:notice] = "Post can not be saved, please enter information."
    end
end
def create
    @addpost = Post.new params[:data