fohow_admin/app/models/scale_result.rb

# encoding:utf-8
class ScaleResult < ActiveRecord::Base
  has_paper_trail
  self.table_name = "scale_result"
  belongs_to :wx_user
  belongs_to :scale_user, :foreign_key => :user_id
  #after_create :update_paied_time

  def wx_user_contact
    return "-" if wx_user.blank?
    user = wx_user.user
    return "-" if user.blank?
    contact = user.tel
    contact = user.email if contact.blank?
    contact.blank? ? "-" : contact
  end

  # 从测量结果中获取时间戳
  def measurement_time
    return nil if result.blank?
    begin
      data = JSON.parse(result)
      timestamp = data['timestamp']
      return nil if timestamp.blank?
      Time.parse(timestamp)
    rescue => e
      nil
    end
  end

  rails_admin do
    navigation_label '测量记录'
    parent ScaleDevice
    weight 2

    list do
      filters [:wx_user,:created_at]
      field :id do
        label 'ID'
      end
      field :wx_user_id do
        label '微信用户ID'
      end
      field :wx_user do
        label '微信用户'
        pretty_value do
          bindings[:object].wx_user_contact
        end
      end
      field :user_id do
        label '称用户ID'
      end
      field :scale_user do
        label '称用户名'
      end
      field :result do
        label '测量结果'
      end
      field :measurement_time do
        label '测量时间'
        pretty_value do
          time = bindings[:object].measurement_time
          time.present? ? time.strftime('%Y-%m-%d %H:%M:%S') : '-'
        end
        sortable false
      end
    end

    show do
      field :id do
        label 'ID'
      end
      field :wx_user_id do
        label '微信用户ID'
      end
      field :wx_user do
        label '微信用户'
        pretty_value do
          bindings[:object].wx_user_contact
        end
      end
      field :user_id do
        label '称用户ID'
      end
      field :scale_user do
        label '称用户名'
      end
      field :result do
        label '测量结果'
      end
      field :measurement_time do
        label '测量时间'
        pretty_value do
          time = bindings[:object].measurement_time
          time.present? ? time.strftime('%Y-%m-%d %H:%M:%S') : '-'
        end
      end
    end

    edit do
      field :wx_user do
        label '微信用户'
      end
      field :scale_user do
        label '称用户名'
      end
      field :result do
        label '测量结果'
      end
    end
  end
end