class TopicTitleLengthValidator < ActiveModel::EachValidator def validate_each(record, attribute, value) title_validator(record).validate_each(record, attribute, value) end private def title_validator(record) length_range = if record.user.try(:admin?) 1..SiteSetting.max_topic_title_length elsif record.private_message? SiteSetting.private_message_title_length else SiteSetting.topic_title_length end ActiveModel::Validations::LengthValidator.new(attributes: :title, in: length_range, allow_blank: true) end end