Simple example how to use elastic search with node.js using standard and ngram tokenizer

elasticsearch-example.js

'use strict';

var elasticsearch = require('elasticsearch');

var log = console.log.bind(console);

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

function dropIndex() {
    return client.indices.delete({
        index: 'test',
    });
}

function dropNgIndex() {
    return client.indices.delete({
        index: 'ngind',
    });
}

function createIndex() {
    return client.indices.create({
        index: 'test',
        mapping: {
            house: {
                name: {
                    type: 'string'
                }
            }
        }
    });
}

function createNgIndex() {
    var settings = {
        "analysis": {
            "tokenizer": {
                "my_ngram_tokenizer": {
                    "type": "nGram",
                    "min_gram": "2",
                    "max_gram": "3",
                    "token_chars": ["letter", "digit"]
                }
            },
            "analyzer": {
                "my_ngram_analyzer": {
                    "tokenizer": "my_ngram_tokenizer",
                    "type": "custom"
                }
            }
        }
    };
    var mapping = {
        "house": {
            "properties": {
                "name": {
                    "type": "string",
                    "term_vector": "yes",
                    "analyzer": "my_ngram_analyzer"
                }
            }
        }
    };
    return client.indices.create({
        index: 'ngind',
        body: {
            settings: settings,
            mappings: mapping
        }
    });
}

function addToIndex() {
    return client.index({
        index: 'test',
        type: 'house',
        id: '1',
        body: {
            name: 'huhu'
        }
    });
}


function addToNgIndex() {
    return client.index({
        index: 'ngind',
        type: 'house',
        id: '1',
        body: {
            name: 'huhu'
        }
    });
}

function search() {
    return client.search({
        index: 'test',
        q: 'huhu'
    }).then(log);
}

function searchNg() {
    return client.search({
        index: 'ngind',
        q: 'huhu'
    }).then(log);
}

function closeConnection() {
    client.close();
}

function getFromIndex() {
    return client.get({
        id: 1,
        index: 'test',
        type: 'house',
    }).then(log);

}

function getFromNgIndex() {
    return client.get({
        id: 1,
        index: 'ngind',
        type: 'house',
    }).then(log);

}

function waitForIndexing() {
    log('Wait for indexing ....');
    return new Promise(function(resolve) {
        setTimeout(resolve, 2000);
    });
}

return Promise.resolve()
    .then(dropNgIndex)
    .then(createNgIndex)
    .then(addToNgIndex)
    .then(getFromNgIndex)
    .then(waitForIndexing)
    .then(searchNg)
    .then(closeConnection);
/*return Promise.resolve()
    .then(dropIndex)
    .then(createIndex)
    .then(addToIndex)
    .then(getFromIndex)
    .then(waitForIndexing)
    .then(search)
    .then(closeConnection);
*/

👌🏼👌🏼 perfect ✋