_meta field

_meta field

A mapping type can have custom meta data associated with it. These are not used at all by Elasticsearch, but can be used to store application-specific metadata, such as the class that a document belongs to:

  1. PUT my-index-000001
  2. {
  3.   "mappings": {
  4.     "_meta": { 
  5.       "class": "MyApp::User",
  6.       "version": {
  7.         "min": "1.0",
  8.         "max": "1.3"
  9.       }
  10.     }
  11.   }
  12. }

This _meta info can be retrieved with the GET mapping API.

The _meta field can be updated on an existing type using the update mapping API:

  1. PUT my-index-000001/_mapping
  2. {
  3.   "_meta": {
  4.     "class": "MyApp2::User3",
  5.     "version": {
  6.       "min": "1.3",
  7.       "max": "1.5"
  8.     }
  9.   }
  10. }