Elasticsearch DSL (Query DSL)

Elasticsearch DSL is a library abstracted on top of Elasticsearch, using which you can write and run queries against the data stored. It in turn wraps Lucene’s query syntax and makes these interactions easy by allowing a query to be composed using a JSON syntax.

A sample query of customer data in Elasticsearch is shown here:

Curl -XPOST ‘http://localhost:9200/customer/_search?pretty=true’ -H 'Content-Type: application/json' -d ‘
{ “from” : 0,
“Size”: 20,
“query”: <QUERY_JSON>,
<FILTER_JSON>,
<SORT_JSON>
}’

In the previous code <QUERY_JSON> can be { "match_all": {} } and <SORT_JSON> can be "sort": { "name": { "order": "desc" } }.

Code 01: Sample Elasticsearch DSL query

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