# frozen_string_literal: true module ActiveRecord module Validations class AssociatedValidator < ActiveModel::EachValidator #:nodoc: def validate_each(record, attribute, value) if Array(value).reject { |r| valid_object?(r) }.any? record.errors.add(attribute, :invalid, options.merge(value: value)) end end private def valid_object?(record) (record.respond_to?(:marked_for_destruction?) && record.marked_for_destruction?) || record.valid? end end module ClassMethods # Validates whether the associated object or objects are all valid. # Works with any kind of association. # # class Book < ActiveRecord::Base # has_many :pages # belongs_to :library # # validates_associated :pages, :library # end # # WARNING: This validation must not be used on both ends of an association. # Doing so will lead to a circular dependency and cause infinite recursion. # # NOTE: This validation will not fail if the association hasn't been # assigned. If you want to ensure that the association is both present and # guaranteed to be valid, you also need to use # {validates_presence_of}[rdoc-ref:Validations::ClassMethods#validates_presence_of]. # # Configuration options: # # * <tt>:message</tt> - A custom error message (default is: "is invalid"). # * <tt>:on</tt> - Specifies the contexts where this validation is active. # Runs in all validation contexts by default +nil+. You can pass a symbol # or an array of symbols. (e.g. <tt>on: :create</tt> or # <tt>on: :custom_validation_context</tt> or # <tt>on: [:create, :custom_validation_context]</tt>) # * <tt>:if</tt> - Specifies a method, proc or string to call to determine # if the validation should occur (e.g. <tt>if: :allow_validation</tt>, # or <tt>if: Proc.new { |user| user.signup_step > 2 }</tt>). The method, # proc or string should return or evaluate to a +true+ or +false+ value. # * <tt>:unless</tt> - Specifies a method, proc or string to call to # determine if the validation should not occur (e.g. <tt>unless: :skip_validation</tt>, # or <tt>unless: Proc.new { |user| user.signup_step <= 2 }</tt>). The # method, proc or string should return or evaluate to a +true+ or +false+ # value. def validates_associated(*attr_names) validates_with AssociatedValidator, _merge_attributes(attr_names) end end end end