fohow_admin/app/models/scale_user.rb

# encoding:utf-8
class ScaleUser < ActiveRecord::Base
  has_paper_trail
  self.table_name = "scale_users"
  belongs_to :wx_user
  attr_accessor :v_head

  #after_create :update_paied_time
  SEX_ENUM = [["男",0],["女",1]]

  def get_avatar_img
    url = "http://#{Ali::Oss::CDN_URL_FOR_HOST}/#{self.avatar}"
    return url
  end
  rails_admin do
    navigation_label '体脂秤用户'
    parent ScaleDevice
    weight 1

    list do
      filters [:wx_user,:created_at]
      field :id
      field :wx_user_id
      field :wx_user
      field :nick_name
      field :avatar do
        formatted_value do
          bindings[:view].tag(:img,{:src => bindings[:object].get_avatar_img,
                    :style => 'width: 100px;height: 100px;cursor: pointer;display: block;max-width: 100px',
                    :onClick => "javascript:window.open('#{bindings[:object].get_avatar_img}')"})
        end
      end
      field :sex, :enum do
        filterable true
        enum do
          SEX_ENUM
        end
      end
      field :height
      field :age
      field :target_weight
      field :birthday
      field :created_at
      field :updated_at
    end

    show do
      field :wx_user_id
      field :wx_user
      field :nick_name
      field :avatar do
        formatted_value do
          bindings[:view].tag(:img,{:src => bindings[:object].get_avatar_img,
            :style => 'width: 100px;height: 100px;cursor: pointer;display: block;max-width: 100px',
            :onClick => "javascript:window.open('#{bindings[:object].get_avatar_img}')"})
        end
      end
      field :sex, :enum do
        filterable true
        enum do
          SEX_ENUM
        end
      end
      field :height
      field :age
      field :target_weight
      field :birthday
      field :created_at
      field :updated_at
    end

    edit do
      field :wx_user_id
      field :wx_user
      field :nick_name
      field :v_avatar, :file_upload do
        pretty_value do
          bindings[:view].tag(:img, {:src => bindings[:object].get_avatar_img, :class => 'preview'})
        end
      end
      field :sex, :enum do
        filterable true
        enum do
          SEX_ENUM
        end
      end
      field :height
      field :age
      field :target_weight
      field :birthday
      field :created_at
      field :updated_at
    end
  end

  def v_avatar=file
    unless file.blank?
      clear_avatar_img
      file_name = "#{UUID.new.generate[0...8].downcase}.jpg"
      file_path = "#{IMG_STORE_PATH}/#{file_name}"
      Ali::Oss.store(Ali::Oss::BUCKET_NAME_PUBLIC_READ, file_path, file.read)
      self.head = file_path
      self.save
    end
  end

  def clear_avatar_img
    file_path = "#{self.head}"
    Ali::Oss.delete_object(Ali::Oss::BUCKET_NAME_PUBLIC_READ, file_path)
  end

end