Rails简单表单不从输入传递参数

# 前端页面（app/views/orders/new.html.erb）
<%= form_for @order do |f| %>
  <%= f.label :order_number %>
  <%= f.text_field :order_number, value: @order.order_number, readonly: true %>
  
  <%= f.submit "提交订单" %>
<% end %>

# 后端控制器（app/controllers/orders_controller.rb）
class OrdersController < ApplicationController
  def new
    @order = Order.new
    @order.order_number = generate_order_number
  end

  def create
    # 保存订单到数据库或其他持久化存储中
    @order = Order.new(order_params)
    if @order.save
      # 其他操作，如发送邮件、生成订单等
      redirect_to @order, notice: "订单创建成功！"
    else
      render :new
    end
  end

  private

  def order_params
    params.require(:order).permit(:order_number)
  end

  def generate_order_number
    # 使用SecureRandom生成订单号
    SecureRandom.hex(8)
  end
end