hometown/app/validators/unreserved_validator.rb

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# frozen_string_literal: true
class UnreservedValidator < ActiveModel::EachValidator
def validate_each(record, attribute, value)
return if value.nil?
record.errors.add(attribute, I18n.t('accounts.reserved_username')) if reserved_username?(value)
end
private
def reserved_username?(value)
return false unless Setting.reserved_usernames
Setting.reserved_usernames.include?(value.downcase)
end
end