Elasticsearch - How to get popular words list of documents

Question

I have a temporary index with documents that I need to moderate. I want to group these documents by the words they contain.

For example, I have these documents:

Answer 1

Doing a simple term aggregation search will meet your needs:

(where mydata is the name of your field)

curl -XGET 'http://localhost:9200/test/data/_search?search_type=count&pretty' -d '{
  "query": {
    "match_all" : {}
  },
  "aggs" : {
      "mydata_agg" : {
    "terms": {"field" : "mydata"}
    }
  }
}'

will return:

{
  "took" : 3,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 3,
    "max_score" : 0.0,
    "hits" : [ ]
  },
  "aggregations" : {
    "mydata_agg" : {
      "doc_count_error_upper_bound" : 0,
      "sum_other_doc_count" : 0,
      "buckets" : [ {
        "key" : "aaa",
        "doc_count" : 3
      }, {
        "key" : "fff",
        "doc_count" : 3
      }, {
        "key" : "bbb",
        "doc_count" : 2
      }, {
        "key" : "ccc",
        "doc_count" : 1
      }, {
        "key" : "ffffd",
        "doc_count" : 1
      }, {
        "key" : "eee",
        "doc_count" : 1
      }, {
        "key" : "hhh",
        "doc_count" : 1
      }, {
        "key" : "mmm",
        "doc_count" : 1
      }, {
        "key" : "xxx",
        "doc_count" : 1
      } ]
    }
  }
}