CRUD operations using Elasticsearch APIs

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Launch Elasticsearch service

Open command prompt in administrative mode Type elasticsearch

In browser check this site: http://localhost:9200 or use curl

Check cluster heatlh status

GET /_cat/health?v&pretty

http://localhost:9200/_cat/health?v&pretty

GET /_cat/nodes?v&pretty

http://localhost:9200/_cat/nodes?v&pretty

Listing all indices

GET /_cat/indices?v&pretty http://localhost:9200/_cat/indices?v&pretty

Create an index (equivalent to creating a new database)

PUT /index-name

curl -XPUT "localhost:9200/products?&pretty"

Query a index/document

Apart from curl, you also use Postman or YARC for handling API request PUT /index-name/document-name/id

{ 
  “field”:”value”, 
    ... : ...
}

Id is optional, if not provided it will generate a unique id for this record

Fetching documents

GET /products/mobile/1

curl -GET "localhost:9200/products/mobiles/1?pretty"

Getting partial documents

curl -GET "localhost:9200/products/mobiles/1?pretty&_source=false"

curl -GET "localhost:9200/products/mobiles/1?pretty&_source=name,reviews"

Updating documents

Updates using the _update API with “doc”

curl -XPOST -H "Content-Type: application/json" "localhost:9200/products/mobiles/2/_update?pretty" -d "{ \"doc\": { \"color\": \"black\"}}"

Deletion

For deleting record

DELETE /index-name/document-name/id

curl -XDELETE "localhost:9200/products/mobiles/2?pretty"

For Removing index

DELETE /index-name

curl –XDELETE “localhost:9200/orders”