a.rb

    client = Elasticsearch::Client.new(log: false, host: SMPDB_ES_URL)
    hits = []
    search = client.search(index: SMPDB_INDEX, scroll: '5m', body: json)
    hits.concat(search['hits']['hits'].map { |hit| SmpdbPathway.new(Hashie::Mash.new(hit['_source'])) })

    # Call the `scroll` API until empty results are returned
    while search = client.scroll(scroll_id: search['_scroll_id'], scroll: '5m') and not search['hits']['hits'].blank? do
      hits.concat(search['hits']['hits'].map { |hit| SmpdbPathway.new(Hashie::Mash.new(hit['_source'])) })
    end

    return hits