# ./app/controllers/profiles_controller.rb
class ProfilesController < ApplicationController
  ...

  private
  ...
    def invalid_address
      if hometown_attrs = profile_params[:hometown_attributes]
        hometown_attrs = hometown_attrs[:address_attributes].except(:id)
      end
      if residence_attrs = profile_params[:residence_attributes]
        residence_attrs = residence_attrs[:address_attributes].except(:id)
      end

      unless incomplete_address(hometown_attrs,residence_attrs)
        case
        when blank_address(hometown_attrs,residence_attrs),Geocoder.new(hometown_attrs).search,Geocoder.new(residence_attrs).search
          @profile.update(profile_params)
          return false
        end
      end

      true
    end
end