elasticsearch

Example for moving and saving indicies.

---

Version!

• Version 6.3.0

Installing

curl -L -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.3.2.tar.gz

tar -xvf elasticsearch-6.3.2.tar.gz

cd elasticsearch-6.3.2/bin

./elasticsearch

Or

https://www.elastic.co/guide/en/elasticsearch/reference/current/_installation.html

Testing

open: http://localhost:9200/ Output:

{
 "name" : "_Oxnb4X",
 "cluster_name" : "elasticsearch",
 "cluster_uuid" : "zT6Mbns6RTOTBolnMSmOqw",
 "version" : {
   "number" : "6.3.0",
   "build_flavor" : "default",
   "build_type" : "zip",
   "build_hash" : "424e937",
   "build_date" : "2018-06-11T23:38:03.357887Z",
   "build_snapshot" : false,
   "lucene_version" : "7.3.1",
   "minimum_wire_compatibility_version" : "5.6.0",
   "minimum_index_compatibility_version" : "5.0.0"
 },
 "tagline" : "You Know, for Search"
}

Quick Start

We are using mongosastic for automating our indexing process while create mongodb model

Basic mongoosastic setup while creating db model

const mongoosastic = require('mongoosastic');

const bookSchema = new mongoose.Schema({
  name: { type: String, es_indexed: true },
  description: { type: String, es_indexed: true },
  publisher: { type: String, es_indexed: true },
  publishedDate: { type: Date, es_indexed: true },
  keyword: { type: String, es_indexed: true },
});

bookSchema.plugin(mongoosastic, {
  host: 'localhost',
  port: 9200,
});

In case you not need to index all feild Example

publishedDate: { type: Date, es_indexed: false },

Add some book http://localhost:3000/add-book (POST)

Now you can see your indexd data at http://localhost:9200/_search (GET)

Search API

For searching we are using default elasticsearch search API

Basic setup in bookservices.js

const elasticsearch = require('elasticsearch');

const client = new elasticsearch.Client({
  host: 'localhost:9200',
  log: 'trace',
});

Full text search at http://localhost:9200/matched-book (POST {data:"ANY STRING"})

client.search({
    q: string.data,
  }).then((body) => {
    const hits = body.hits.hits;
    resolve(hits);
  }, 

Filter based search at http://localhost:9200/filter-book (POST [ { "match": { "description": "fast" } }, { "match": { "keyword": "hacker" } } ])

client.search({
  index: 'bookss',
  type: 'books',
  body: {
    query: {
      bool: {
        must: [
          filterData,
        ],
        filter: [
          // { term: { publisher: '' } },
        ],
      },
    },
  },
}).then((body) => {
  const hits = body.hits.hits;
  resolve(hits);
  

For more, read https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html