Indexer example fails on ES 7+

[dixpac]

Indexer example:

class Indexer
  include Sidekiq::Worker
  sidekiq_options queue: 'elasticsearch', retry: false

  Logger = Sidekiq.logger.level == Logger::DEBUG ? Sidekiq.logger : nil
  Client = Elasticsearch::Client.new host: 'localhost:9200', logger: Logger

  def perform(operation, record_id)
    logger.debug [operation, "ID: #{record_id}"]

    case operation.to_s
      when /index/
        record = Article.find(record_id)
        Client.index  index: 'articles', type: 'article', id: record.id, body: record.__elasticsearch__.as_indexed_json
      when /delete/
        begin
          Client.delete index: 'articles', type: 'article', id: record_id
        rescue Elasticsearch::Transport::Transport::Errors::NotFound
          logger.debug "Article not found, ID: #{record_id}"
        end
      else raise ArgumentError, "Unknown operation '#{operation}'"
    end
  end
end

Doesn't work for me on ES 7. When I change the type from article -> _doc then it works:

Client.index  index: 'articles', type: '_doc', id: record.id, body: record.__elasticsearch__.as_indexed_json

#or 
Client.index  index: 'articles' id: record.id, body: record.__elasticsearch__.as_indexed_json

---

Maybe I'm doing something wrong or this is expected change but didn't yet get into README since 7 branch is still not released. I'm just posting it here so maybe it can help someone.

[dixpac]

Opened a PR maybe doesn't make a sense 😅