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# frozen_string_literal: true
class Topic < ActiveRecord::Base
validates_presence_of :author_name
validates :title, numericality: { only_integer: true }, on: :context_test
validates :title, uniqueness: true
validates :content, uniqueness: true
validates :word_count, numericality: { greater_than: 0 }, if: :content?
validate -> { errors.add(:title, :validate_failed) if title == 'validate_failed' }
before_validation -> { errors.add(:title, :invalid) if title == 'invalid' }
has_many :books, inverse_of: :topic
belongs_to :parent, class_name: "Topic"
composed_of :description, mapping: [%w(title title), %w(author_name author_name)], allow_nil: true, class_name: "TopicDescription"
default_scope { where(approved: true) }
private
def word_count
@word_count ||= content.to_s.scan(/\w+/).count
end
end
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