保存前回调:SystemstackError:堆栈级别太深

class Sleep < ApplicationRecord
  has_one :poi, as: :poitable, dependent: :destroy
  accepts_nested_attributes_for :poi

在我的睡眠控制器中:

 def create
   @sleep = Sleep.new(sleep_params)
   @sleep.user_id = current_user.id if current_user
   if @sleep.save
     redirect_to track_sleeps_path, notice: t(".sleep_created")
   else
    render :new
   end
 end

 def sleep_params
   params.require(:sleep).permit(
    :name,
    .......,
    { :poi_attributes => [..., :latitude, :longitude, :lonlat, :poitable_id, :poitable_type] } )
 end

class Poi < ApplicationRecord
  geocoded_by :full_address
  after_validation :geocode, if: :will_save_change_to_address?
  before_create :set_st_point
  belongs_to :poitable, polymorphic: true, optional:true

当我创建一个新实例时,我通过地理编码程序获得经度和纬度。它工作得很好。

  def set_st_point
    if latitude.present? && longitude.present?
      self.lonlat = "POINT(#{longitude} #{latitude})"
    end
  end

我一直在尝试“保存前”、“创建前”,但字段lonlat保持空白。

我想做的是:

  def set_st_point
    if latitude.present? && longitude.present?
     self.lonlat = "POINT(#{longitude} #{latitude})"
     self.save!
   end
  end