LocationIndex.php

<?php

namespace App;

use ScoutElastic\IndexConfigurator;
use ScoutElastic\Migratable;

class LocationIndex extends IndexConfigurator
{
    use Migratable;
    protected $name = "locations";

    /**
     * Configure Analyzers
     * https://github.com/babenkoivan/scout-elasticsearch-driver
     * https://www.elastic.co/guide/en/elasticsearch/guide/current/configuring-analyzers.html
     * https://www.elastic.co/guide/en/elasticsearch/guide/current/asciifolding-token-filter.html
     * https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-edgengram-tokenizer.html
     * https://www.elastic.co/guide/en/elasticsearch/reference/6.7/search-aggregations-bucket-geohashgrid-aggregation.html
     * https://hackernoon.com/elasticsearch-building-autocomplete-functionality-494fcf81a7cf
     * @var array
     */
    protected $settings = [
        "analysis" => [
            "analyzer" => [
                "keyword" => [
                    "type"=> "custom",
                    "tokenizer"=> "keyword",
                    "filter"=> [
                        "lowercase",
                        "asciifolding"
                    ],
                ],
                "autocomplete" => [
                    "tokenizer" => "edge_ngram",
                    "filter" =>[
                        "lowercase",
                        "asciifolding"
                    ],
                ],
                "autocomplete_search" => [
                    "tokenizer" => "lowercase",
                    "filter"=> [
                        "lowercase",
                        "asciifolding"
                    ],
                ]
            ],
            "tokenizer" => [
                "edge_ngram"=> [
                    "type"=> "edge_ngram",
                    "min_gram"=> 2,
                    "max_gram"=> 10,
                    "token_chars" => [
                        "letter",
                        "digit"
                    ]
                ],
            ],
            "aggregations" => [
                "large-grid" => [
                    "geohash_grid" => [
                        "field" => "geo_point",
                        "precision" => 3,
                    ]
                ]
            ],
        ]
    ];
}