class List < ActiveRecord::Base belongs_to :board belongs_to :label enum list_type: { backlog: 0, label: 1, closed: 2 } validates :board, :list_type, presence: true validates :label, :position, presence: true, if: :label? validates :label_id, uniqueness: { scope: :board_id }, if: :label? validates :position, numericality: { only_integer: true, greater_than_or_equal_to: 0 }, if: :label? before_destroy :can_be_destroyed scope :destroyable, -> { where(list_type: list_types[:label]) } scope :movable, -> { where(list_type: list_types[:label]) } def destroyable? label? end def movable? label? end def title label? ? label.name : list_type.humanize end def as_json(options = {}) super(options).tap do |json| if options.key?(:label) json[:label] = label.as_json( project: board.project, only: [:id, :title, :description, :color] ) end end end private def can_be_destroyed destroyable? end end