class Pirate < ActiveRecord::Base belongs_to :parrot has_and_belongs_to_many :parrots has_and_belongs_to_many :parrots_with_method_callbacks, :class_name => "Parrot", :before_add => :log_before_add, :after_add => :log_after_add, :before_remove => :log_before_remove, :after_remove => :log_after_remove has_and_belongs_to_many :parrots_with_proc_callbacks, :class_name => "Parrot", :before_add => proc {|p,pa| p.ship_log << "before_adding_proc_parrot_#{pa.id || ''}"}, :after_add => proc {|p,pa| p.ship_log << "after_adding_proc_parrot_#{pa.id || ''}"}, :before_remove => proc {|p,pa| p.ship_log << "before_removing_proc_parrot_#{pa.id}"}, :after_remove => proc {|p,pa| p.ship_log << "after_removing_proc_parrot_#{pa.id}"} has_many :treasures, :as => :looter has_many :treasure_estimates, :through => :treasures, :source => :price_estimates # These both have :autosave enabled because accepts_nested_attributes_for is used on them. has_one :ship has_many :birds has_many :birds_with_method_callbacks, :class_name => "Bird", :before_add => :log_before_add, :after_add => :log_after_add, :before_remove => :log_before_remove, :after_remove => :log_after_remove has_many :birds_with_proc_callbacks, :class_name => "Bird", :before_add => proc {|p,b| p.ship_log << "before_adding_proc_bird_#{b.id || ''}"}, :after_add => proc {|p,b| p.ship_log << "after_adding_proc_bird_#{b.id || ''}"}, :before_remove => proc {|p,b| p.ship_log << "before_removing_proc_bird_#{b.id}"}, :after_remove => proc {|p,b| p.ship_log << "after_removing_proc_bird_#{b.id}"} accepts_nested_attributes_for :parrots, :birds, :allow_destroy => true, :reject_if => proc { |attributes| attributes.empty? } accepts_nested_attributes_for :ship, :allow_destroy => true, :reject_if => proc { |attributes| attributes.empty? } accepts_nested_attributes_for :parrots_with_method_callbacks, :parrots_with_proc_callbacks, :birds_with_method_callbacks, :birds_with_proc_callbacks, :allow_destroy => true validates_presence_of :catchphrase def ship_log @ship_log ||= [] end private def log_before_add(record) log(record, "before_adding_method") end def log_after_add(record) log(record, "after_adding_method") end def log_before_remove(record) log(record, "before_removing_method") end def log_after_remove(record) log(record, "after_removing_method") end def log(record, callback) ship_log << "#{callback}_#{record.class.name.downcase}_#{record.id || ''}" end end