@endtoendpaper: Stars
Famous people's birthdays.
Scale and chord patterns for major, natural minor, harmonic minor, and melodic minor scales.
# shared model methods (and callbacks, validates, scopes, associations) - instance and class module Item extend ActiveSupport::Concern # instance associations, scopes, validations, callbacks, methods, private methods included do belongs_to :user has_many :collaborations, as: :record, dependent: :destroy has_many :collaborators, :through => :collaborations, source: :user ... validates_presence_of :visibility ... before_destroy do tags.each do |tag| tag.destroy if tag.should_delete? end end def owner_handle '@' + owner.username unless owner.nil? end private def private_method ... end end class_methods do def self.search(search) ... end end end