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# frozen_string_literal: true
# NestedAttributesDuplicates
#
# This validator is designed for especially the following condition
# - Use `accepts_nested_attributes_for :xxx` in a parent model
# - Use `validates :xxx, uniqueness: { scope: :xxx_id }` in a child model
class NestedAttributesDuplicatesValidator < ActiveModel::EachValidator
def validate_each(record, attribute, value)
return if child_attributes.any? { |child_attribute| record.errors.include?(:"#{attribute}.#{child_attribute}") }
if options[:scope]
scoped = value.group_by do |variable|
Array(options[:scope]).map { |attr| variable.send(attr) } # rubocop:disable GitlabSecurity/PublicSend
end
scoped.each_value { |scope| validate_duplicates(record, attribute, scope) }
else
validate_duplicates(record, attribute, value)
end
end
private
# rubocop: disable CodeReuse/ActiveRecord
def validate_duplicates(record, attribute, values)
child_attributes.each do |child_attribute|
duplicates = values.reject(&:marked_for_destruction?).group_by(&:"#{child_attribute}").select { |_, v| v.many? }.map(&:first)
next unless duplicates.any?
error_message = "have duplicate values (#{duplicates.join(", ")})"
error_message << " for #{values.first.send(options[:scope])} scope" if options[:scope] # rubocop:disable GitlabSecurity/PublicSend
record.errors.add(attribute, error_message)
end
end
# rubocop: enable CodeReuse/ActiveRecord
def child_attributes
options[:child_attributes] || %i[key]
end
end
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