Override a Rails attr_accessor method with a method that expects an argument and watch it fail.

error

temp.rb:19:in `title': wrong number of arguments (0 for 1) (ArgumentError)
  from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activemodel-3.2.12/lib/active_model/dirty.rb:143:in `attribute_change'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activemodel-3.2.12/lib/active_model/dirty.rb:117:in `block in changes'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activemodel-3.2.12/lib/active_model/dirty.rb:117:in `map'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activemodel-3.2.12/lib/active_model/dirty.rb:117:in `changes'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.12/lib/active_record/attribute_methods/dirty.rb:34:in `block in save!'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.12/lib/active_record/attribute_methods/dirty.rb:33:in `tap'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.12/lib/active_record/attribute_methods/dirty.rb:33:in `save!'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.12/lib/active_record/transactions.rb:264:in `block in save!'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.12/lib/active_record/transactions.rb:313:in `block in with_transaction_returning_status'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in `transaction'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.12/lib/active_record/transactions.rb:208:in `transaction'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.12/lib/active_record/transactions.rb:311:in `with_transaction_returning_status'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activerecord-3.2.12/lib/active_record/transactions.rb:264:in `save!'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/factory_girl-3.4.2/lib/factory_girl/configuration.rb:18:in `block in initialize'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/factory_girl-3.4.2/lib/factory_girl/evaluation.rb:15:in `[]'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/factory_girl-3.4.2/lib/factory_girl/evaluation.rb:15:in `create'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/factory_girl-3.4.2/lib/factory_girl/strategy/create.rb:12:in `block in result'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/factory_girl-3.4.2/lib/factory_girl/strategy/create.rb:9:in `tap'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/factory_girl-3.4.2/lib/factory_girl/strategy/create.rb:9:in `result'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/factory_girl-3.4.2/lib/factory_girl/factory.rb:42:in `run'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/factory_girl-3.4.2/lib/factory_girl/factory_runner.rb:23:in `block in run'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/activesupport-3.2.12/lib/active_support/notifications.rb:125:in `instrument'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/factory_girl-3.4.2/lib/factory_girl/factory_runner.rb:22:in `run'
	from /Users/jonathanwallace/.rvm/gems/ruby-1.9.3-p125/gems/factory_girl-3.4.2/lib/factory_girl/strategy_syntax_method_registrar.rb:19:in `block in define_singular_strategy_method'
	from temp.rb:29:in `<main>'

override_attr_reader.rb

require 'rubygems'
require 'factory_girl'
require 'active_record'

ActiveRecord::Base.establish_connection(
  adapter: "sqlite3",
  dbfile: ":memory:",
  database: "temp"
)

ActiveRecord::Schema.define do
  create_table :albums do |table|
    table.column :title, :string
    table.column :performer, :string
  end
end

class Album < ActiveRecord::Base
  def title(asdf)
  end
end

FactoryGirl.define do
  factory :album do
    title "title"
  end
end

album = FactoryGirl.create(:album)

p album.inspect