# frozen_string_literal: true class Ship < ActiveRecord::Base self.record_timestamps = false belongs_to :pirate belongs_to :update_only_pirate, class_name: "Pirate" belongs_to :developer, dependent: :destroy has_many :parts, class_name: "ShipPart" has_many :treasures accepts_nested_attributes_for :parts, allow_destroy: true accepts_nested_attributes_for :pirate, allow_destroy: true, reject_if: proc(&:empty?) accepts_nested_attributes_for :update_only_pirate, update_only: true validates_presence_of :name attr_accessor :cancel_save_from_callback before_save :cancel_save_callback_method, if: :cancel_save_from_callback def cancel_save_callback_method throw(:abort) end end class ShipWithoutNestedAttributes < ActiveRecord::Base self.table_name = "ships" has_many :prisoners, inverse_of: :ship, foreign_key: :ship_id has_many :parts, class_name: "ShipPart", foreign_key: :ship_id validates :name, presence: true, if: -> { true } validates :name, presence: true, if: -> { true } end class Prisoner < ActiveRecord::Base belongs_to :ship, autosave: true, class_name: "ShipWithoutNestedAttributes", inverse_of: :prisoners end class FamousShip < ActiveRecord::Base self.table_name = "ships" belongs_to :famous_pirate validates_presence_of :name, on: :conference end