发送通知电子邮件时导轨中出现奇怪错误

Question

我正在尝试向用户点击下订单按钮时​​提供的电子邮件发送通知电子邮件，但我收到此错误

TypeError: no implicit conversion of Symbol into Integer

错误在order_controller.rb文件中，这是

class OrdersController < ApplicationController

    def create
        @order_form=OrderForm.new(user: User.new(order_params[:user]),cart: @cart)
        if @order_form.save
            notify_user
            redirect_to root_path,notice:"Thank You for placing the order sir."
        else
        render "carts/checkout"
        end
    end

   private

    def notify_user
      OrderMailer.order_confirmation(@order_form.order).deliver  
    end

    def order_params
        params.require(:order_form).permit(
            user:[:name,:phone,:address,:city,:country,:postal_code,:email])
    end
end

这是order_form.rb模型

class OrderForm
    include ActiveModel::Model
    attr_accessor :user,:order
    attr_writer :cart
    def save
        set_password_for_user
        if valid?
            persist
            true
            else
            false
        end
    end
    def has_error?
        user.errors.any?
    end

    private
    def valid?
        user.valid?
    end

    def persist
        user.save
        @order=Order.create!(user:user)
        build_order_items
    end

    def set_password_for_user
        user.password="examplepassword"
    end

    def build_order_items
        @cart.items.each do |item|
            @order.order_items.create! product_id: item.product_id, quantity: item.quantity

        end
    end
end

最后是我的order_mailer.rb邮件程序

class OrderMailer < ActionMailer::Base
    default from: "bobbyverma946@yahoo.in"


    def order_confirmation order
        @order=order
        mail to: order.user.email, subject: "Your order (##{order.id})"
    end
end

有人可以告诉我代码有什么问题，因为我真的很困惑