Elasticsearch：文档分数等于字段中的命中数

Question

Using elasticsearch, I'm searching through an index on a field that typically has a large amount of text and I simply want to know the number of times the query was matched per document. Anyone know of a good way to do this? I'd like to do it through the score value if possible. So for example, if I searched "fox" on "the quick brown fox jumped over the lazy fox", I'd get something that includes:

"_score" : 2.0

Answer 1

The default scoring model also account this into picture , but then this is not the only thing accounts. What you are looking for is called term frequency. The default scoring model is based on TF-IDF ( Term frequency and inverse document frequency) and also field length. You can read more about it here .

Now coming back to your requirement , you can use the scripting module and function score query

{
  "query": {
    "function_score": {
      "query": {
        "match": {
          "field": "fox"
        }
      },
      "boost_mode": "replace",
      "functions": [
        {
          "script_score": {
            "script": "_index['field']['fox'].tf()"
          }
        }
      ]
    }
  }
}