Mapping

  • Defines how document and its fields are stored and indexed
  • Mapping can be derived dynamically by ElasticSearch
  • Handful core data types are supported
  • Mapping can be added to existing index for new fields
  • Existing field mapping not always possible to modify
  • ElasticSearch will derive mapping for new type and for new fields:
    curl -XPOST localhost:9200/orders/orders/1 \
    -H 'Content-Type: application/json' \
    -d '{"id": "1", "placedOn": "2016-10-17T13:03:30.830Z"}'
    
  • Retrieving existing mappings:
    curl 'localhost:9200/orders/orders/_mapping?pretty=true'
    
  • Expected response: ``` { "orders" : { "mappings" : {
    "orders" : {
      "properties" : {
        "id" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "placedOn" : {
          "type" : "date"
        }
      }
    }
    
    } } }

```

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