How to not-analyze in ElasticSearch?

keyword analyser can be also used.

// don't actually use this, use "index": "not_analyzed" instead
{
  "my_type": {
    "properties": {
      "my_field1": { "type": "string", "analyzer": "english" },
      "my_field2": { "type": "string", "analyzer": "keyword" }
    }
  }
}

As noted here: https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-keyword-analyzer.html, it makes more sense to mark those fields as not_analyzed.

But keyword analyzer can be useful when it is set by default for whole index.

UPDATE: As it said in comments, string is no longer supported in 5.X

"my_field2": {
    "properties": {
        "title": {
            "type": "string",
            "index": "not_analyzed"
        }
    }
}

Check you here, https://www.elastic.co/guide/en/elasticsearch/reference/1.4/mapping-core-types.html, for further info.

This is no longer true due to the removal of the string (replaced by keyword and text) type as described here. Instead you should use keyword type with "index": true | false.

For Example OLD:

{
  "foo": {
    "type" "string",
    "index": "not_analyzed"
  }
}

becomes NEW:

{
  "foo": {
    "type" "keyword",
    "index": true
  }
}

This means the field is indexed but as it is typed as keyword not analyzed implicitly. If you would like to have the field analyzed, you need to use text type.