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