Store Limited Field Document For Free

Configuring Elasticsearch to Exclude Fields By setting the ?index? property to ?false?, Elasticsearch will not index the field, and it will not be searchable or available for aggregations.

Fields(); GetField field = fieldMap. get("title"); return (String)field.

To retrieve specific fields in the search response, use the fields parameter. Because it consults the index mappings, the fields parameter provides several advantages over referencing the _source directly. Specifically, the fields parameter: Returns each value in a standardized way that matches its mapping type.

To exclude a field from being indexed in Elasticsearch, you can use the ?index? property in the field's mapping. By setting the ?index? property to ?false?, Elasticsearch will not index the field, and it will not be searchable or available for aggregations.

You may use _field_names field. The _field_names field indexes the names of every field in a document that contains any value other than null. Very convenient indeed. Do note that keys which contain "." in their name may confuse you a bit in how cascaded they are in the document...

You can search nested fields using dot notation that includes the complete path, such as obj1.name . Multi-level nesting is automatically supported, and detected, resulting in an inner nested query to automatically match the relevant nesting level, rather than root, if it exists within another nested query.

Stored fields returned as arrays For consistency, stored fields are always returned as an array because there is no way of knowing if the original field value was a single value, multiple values, or an empty array.