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PORails 3 with composed_of model and validation get error "NoMethodError: undefined method `marked_for_destruction?'"
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copied!<p>I have tried to add custom validation as is written in <a href="https://stackoverflow.com/questions/6707636/rails-3-with-composed-of-model-and-validation">Rails 3 with composed_of model and validation</a> but i got strange error: "NoMethodError: undefined method `marked_for_destruction?' for Money"</p> <p>And I don't understand what is wrong.</p> <p>Can you help me?</p> <p>Model:</p> <pre><code># == Schema Information # # Table name: transactions # # id :integer not null, primary key # text :string(255) # amount_cents :integer default(0), not null # ... class Transaction < ActiveRecord::Base attr_accessible :text, :amount, ... validates :text, :length => { :maximum => 255 } composed_of :amount, :class_name => "Money", :mapping => %w(amount_cents cents), :converter => Proc.new { |value| Money.to_money(value) } validates :amount, :presence => true, :numericality => { :greater_than_or_equal_to => 0 } validates_associated :amount ... end class Money attr_reader :cents def initialize(cents) @cents = cents end class << self def to_money(str_money) cents = (str_money.to_f * 100).to_i Money.new(cents) end def to_money?(str_money) /\A\d+(\.\d+)?\z/ == str_money.to_s end end def ==(value) @cents == self.class.to_money(value).cents end def to_i @cents end def to_f @cents.to_f end def to_s return nil if @cents.nil? unit, subunit = @cents.abs.divmod(100) unit_str = "" subunit_str = "" fraction_str = "" unit_str, subunit_str = unit.to_s, subunit.to_s subunit_str.insert(0, '0') while subunit_str.length < 2 absolute_str = "#{unit_str}.#{subunit_str}#{fraction_str}" absolute_str.tap do |str| str.insert(0, "-") if @cents < 0 end end def inspect "#<Money cents:#{@cents} to_s:#{self.to_s}>" end end </code></pre> <p>Error:</p> <pre><code>1.9.3p194 :001 > t = Transaction.new => #<Transaction id: nil, text: nil, amount_cents: 0, date: nil, created_at: nil, updated_at: nil, transaction_type_id: nil, account_id: nil, user_id: nil, trans_account_id: nil, trans_amount_cents: 0> 1.9.3p194 :002 > t.amount = 100 => 100 1.9.3p194 :003 > t.valid? NoMethodError: undefined method `marked_for_destruction?' for #<Money cents:10000 to_s:100.00> from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activerecord-3.2.8/lib/active_record/validations/associated.rb:5:in `block in validate_each' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activerecord-3.2.8/lib/active_record/validations/associated.rb:5:in `reject' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activerecord-3.2.8/lib/active_record/validations/associated.rb:5:in `validate_each' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activemodel-3.2.8/lib/active_model/validator.rb:153:in `block in validate' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activemodel-3.2.8/lib/active_model/validator.rb:150:in `each' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activemodel-3.2.8/lib/active_model/validator.rb:150:in `validate' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:310:in `_callback_before_21' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:462:in `_run__74709952__validate__911291598__callbacks' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:405:in `__run_callback' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:385:in `_run_validate_callbacks' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activemodel-3.2.8/lib/active_model/validations.rb:227:in `run_validations!' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activemodel-3.2.8/lib/active_model/validations/callbacks.rb:53:in `block in run_validations!' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:403:in `_run__74709952__validation__911291598__callbacks' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:405:in `__run_callback' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:385:in `_run_validation_callbacks' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/callbacks.rb:81:in `run_callbacks' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activemodel-3.2.8/lib/active_model/validations/callbacks.rb:53:in `run_validations!' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activemodel-3.2.8/lib/active_model/validations.rb:194:in `valid?' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activerecord-3.2.8/lib/active_record/validations.rb:69:in `valid?' from (irb):3 from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/commands/console.rb:47:in `start' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/commands/console.rb:8:in `start' from /home/alexvs/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/commands.rb:41:in `<top (required)>' from script/rails:6:in `require' </code></pre>

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