elasticsearchHow can I use Elasticsearch to find a document by a specific field?

Elasticsearch can be used to find a document by a specific field using the match query. This query looks for documents that contain a specified field with a specified value. For example, to search for a document that contains the field title with the value example:

GET /_search
{
  "query": {
    "match": {
      "title": "example"
    }
  }
}

The output of this query would be the documents that contain the field title with the value example:

{
  "hits": {
    "total": 1,
    "max_score": 0.2876821,
    "hits": [
      {
        "_index": "my_index",
        "_type": "_doc",
        "_id": "1",
        "_score": 0.2876821,
        "_source": {
          "title": "example"
        }
      }
    ]
  }
}

The parts of the code are as follows:

1. GET /_search - This is the endpoint for the search query.
2. "query": { - This is the start of the query body.
3. "match": { - This is the start of the match query.
4. "title": "example" - This is the field and value to match.
5. } - This closes the match query.
6. } - This closes the query body.

Helpful links

• Elasticsearch Query DSL
• Match Query

Edit this code on GitHub