fohow_admin/app/models/order_refund.rb

class OrderRefund < ActiveRecord::Base
    has_paper_trail
    self.table_name = "order_refunds"
    validates :order_id, presence: true
    belongs_to :wx_user, :foreign_key => :wx_user_id
    belongs_to :order, :foreign_key => :order_id, :primary_key => :order_id
    before_save :before_save

    STATUS_ENUM = [["待审核", false], ["已退款", true]]
    PAY_WAY_ENUM = [
      ["微信支付", "weixinpay"],
      ["通联支付", "allinpay"],
      ["提货券支付", "balance"],
      ["佣金支付", "cash"],
      ["积分支付", "cent"],
    ]
    ORDER_STATUS_ENUM = [["未支付","unpay"],["已关闭","closed"],["待确认","unconfirmed"],["处理中","processing"],["已完成","complete"],["待收货","dispatch"],["已退款","refunded"]]

    def before_save
      order = Order.where("order_id = ?", self.order_id).first
      if !order.blank?
        self.wx_user_id = order.wx_user_id
        self.total = order.total_price
        self.refund_fee = order.paied_price
        self.transaction_id = order.trade_no
      end
    end

    def pay_way
      order = Order.where("order_id = ?", self.order_id).first
      order.blank? ? "" : order.pay_way
    end

    def order_status
      order = Order.where("order_id = ?", self.order_id).first
      order.blank? ? "" : order.status
    end

    rails_admin do
      navigation_label '订单退款记录'
      weight -500
      parent Order
        list do 
          filters [:id,:order_id,:status,:transaction_id]
          field :id
          field :order_id
          field :wx_user
          field :pay_way, :enum do
            label "支付方式"
            enum do
              PAY_WAY_ENUM
            end
          end
          field :order_status, :enum do
            label "订单状态"
            enum do
              ORDER_STATUS_ENUM
            end
          end
          field :transaction_id
          field :total do
            label "订单金额（元）"
            formatted_value do # used in form views
              value.to_f / 100
            end
          end
          field :refund_fee do
            label "退款金额（元）"
            formatted_value do # used in form views
              value.to_f / 100
            end
          end
          field :refund_time do
            pretty_value do
              # value.to_i >0 ? Time.at(value.to_i) : ''
              (value == nil || value <=0) ? "" : Time.at(value)
            end
          end
          field :status, :enum do
            label "退款状态"
            enum do
              STATUS_ENUM
            end
          end
          field :remark
          field :created_at
        end

        show do
          field :id
          field :order_id
          field :wx_user
          field :pay_way, :enum do
            label "支付方式"
            enum do
              PAY_WAY_ENUM
            end
          end
          field :order_status, :enum do
            label "订单状态"
            enum do
              ORDER_STATUS_ENUM
            end
          end
          field :transaction_id
          field :total
          field :total do
            label "订单金额（元）"
            formatted_value do # used in form views
              value.to_f / 100
            end
          end
          field :refund_fee do
            label "退款金额（元）"
            formatted_value do # used in form views
              value.to_f / 100
            end
          end
          field :refund_time do
            pretty_value do
              # value.to_i >0 ? Time.at(value.to_i) : ''
              (value == nil || value <=0) ? "" : Time.at(value)
            end
          end
          field :status, :enum do
            label "退款状态"
            enum do
              STATUS_ENUM
            end
          end
          field :remark
          field :created_at
          field :updated_at
        end

        edit do
          field :order_id
          field :remark
        end
    end
end