class ClosetList < ActiveRecord::Base belongs_to :user has_many :hangers, :class_name => 'ClosetHanger', :foreign_key => 'list_id' # Nullification of associated records occurs in the ClosetListObserver. attr_accessible :description, :hangers_owned, :name, :visibility validates :name, :presence => true, :uniqueness => {:scope => :user_id} validates :user, :presence => true validates :hangers_owned, :inclusion => {:in => [true, false], :message => "can't be blank"} scope :alphabetical, order(:name) scope :public, where(arel_table[:visibility].gteq(ClosetVisibility[:public].id)) scope :visible_to, lambda { |user| condition = arel_table[:visibility].gteq(ClosetVisibility[:public].id) condition = condition.or(arel_table[:user_id].eq(user.id)) if user where(condition) } after_save :sync_hangers_owned! def sync_hangers_owned! if hangers_owned_changed? hangers.each do |hanger| hanger.owned = hangers_owned hanger.save! end end end def try_non_null(method_name) send(method_name) end module VisibilityMethods delegate :trading?, to: :visibility_level def visibility_level ClosetVisibility.levels[visibility] end def trading_changed? return false unless visibility_changed? level_change = visibility_change.map { |v| ClosetVisibility.levels[v] } old_trading, new_trading = level_change.map(&:trading?) old_trading != new_trading end end include VisibilityMethods class Null include VisibilityMethods attr_reader :user def initialize(user) @user = user end def hangers user.closet_hangers.unlisted.where(owned: hangers_owned) end def hangers_owned? hangers_owned end def try_non_null(method_name) nil end end class NullOwned < Null def hangers_owned true end def visibility user.owned_closet_hangers_visibility end def visibility_changed? user.owned_closet_hangers_visibility_changed? end def visibility_change user.owned_closet_hangers_visibility_change end end class NullWanted < Null def hangers_owned false end def visibility user.wanted_closet_hangers_visibility end def visibility_changed? user.wanted_closet_hangers_visibility_changed? end def visibility_change user.wanted_closet_hangers_visibility_change end end end