How to do it...

You can explicitly create a mapping by adding a new document in Elasticsearch. For this, we will perform the following steps:

1. Create an index like so:

PUT test

The answer will be as follows:

{
 "acknowledged" : true,
 "shards_acknowledged" : true,
 "index" : "test"
 }

1. Put a document in the index, as shown in the following code:

PUT test/_doc/1
{"name":"Paul", "age":35}

The answer will be as follows:

{
  "_index" : "test",
  "_type" : "_doc",
  "_id" : "1",
  "_version" : 1,
  "result" : "created",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 0,
  "_primary_term" : 1
}

1. Get the mapping with the following code:

GET test/_mapping

1. The result mapping that's autocreated by Elasticsearch should be as follows:

{
  "test" : {
    "mappings" : {
      "properties" : {
        "age" : {
          "type" : "long"
        },
        "name" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        }
      }
    }
  }
}

1. To delete the index, you can call the following:

DELETE test

The answer will be as follows:

{
  "acknowledged" : true
}