diff options
Diffstat (limited to 'app/validators/nested_attributes_duplicates_validator.rb')
-rw-r--r-- | app/validators/nested_attributes_duplicates_validator.rb | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/app/validators/nested_attributes_duplicates_validator.rb b/app/validators/nested_attributes_duplicates_validator.rb new file mode 100644 index 00000000000..b60350a6311 --- /dev/null +++ b/app/validators/nested_attributes_duplicates_validator.rb @@ -0,0 +1,40 @@ +# 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) + if 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 + end + # rubocop: enable CodeReuse/ActiveRecord + + def child_attributes + options[:child_attributes] || %i[key] + end +end |