Callbacks or Object Form?

gistfile1.rb

# Given:
require 'active_record'
require 'sqlite3'
ActiveRecord::Base.establish_connection(
	adapter: 'sqlite3',
	database: 'mydbfile.sqlite'
)
ActiveRecord::Schema.define do
	create_table 'users', force: true do |t|
		t.string 'name'
	end
end
class Geocoder
	def initialize(user)
		# stuff
	end
	def process
		# stuff
	end
end

# option A: Callbacks in 14 lines of code
ActiveRecord::Base.class_eval do
	def without_halting_save
		yield
		true
	end
end
class User < ActiveRecord::Base
	before_save :geocode
	def geocode
		without_halting_save { Geocoder.new(self).process }
	end
end
user = User.new(name: 'foo')
user.save

# option B: Object Form in 15 lines of code
class User < ActiveRecord::Base
end
class UserForm
	def initialize(user:)
		@user = user
	end
	def save
		geocoder = Geocoder.new(@user)
		geocoder.process
		@user.save
	end
end
user = User.new(name: 'foo')
form = UserForm.new(user: user)
form.save