lib/tasks/migrate_last_comment_created_at.rake
namespace :data do
desc 'sets most recent comment created at timestamp on discussions and boards'
task migrate_last_comment_created_at: :environment do
Discussion.find_each do |discussion|
last_comment_created_at = discussion.comments.order(created_at: :desc).first.try(:created_at) || discussion.created_at
discussion.update_columns last_comment_created_at: last_comment_created_at
end
Board.find_each do |board|
last_comment_created_at = board.discussions.order(last_comment_created_at: :desc).first.try(:last_comment_created_at) || board.created_at
board.update_columns last_comment_created_at: last_comment_created_at
end
end
end