OpenSearch Engine for Laravel Scout

This package provides an OpenSearch engine for Laravel Scout. It's built on top of the latest release of Laravel Scout and lets you use OpenSearch as a driver for Scout.

Features

• Laravel Scout 9 support
• Fully configurable settings per index, with default settings support
• Optionally mappings configurable
• Cursor pagination

Requirements

• PHP >= 8.0
• Laravel >= 8

Installation

You can include this package via Composer:

composer require "cloudmediasolutions/laravel-scout-opensearch"

Add / set environment variables (in .env):

SCOUT_DRIVER=CloudMediaSolutions\LaravelScoutOpenSearch\Engines\OpenSearchEngine

Add your OpenSearch host(s): (You can seperate multiple hosts with a comma)

OPENSEARCH_HOSTS=http://localhost:9200

If you have any web authentication on your OpenSearch cluster, you can extend the opensearch.client config.

Basic authentication:

    'client' => [
        'hosts' => explode(',', env('OPENSEARCH_HOSTS')),
        'basicAuthentication' => [
            env('OPENSEARCH_USERNAME'),
            env('OPENSEARCH_PASSWORD'),
        ],
    ],

Usage

Before you can use custom index settings and mappings, you have to publish the config to your application:

php artisan vendor:publish --tag "opensearch-config"

After changing indexes you have to create the index:

If the index already exists, delete it first:

php artisan scout:delete-index yourSearchableAsValue

Then you can create the index:

php artisan scout:index yourSearchableAsValue

The index is at this point completely empty. You can import existing data as described in the Laravel Scout documentation:

php artisan scout:import "App\Models\Post"

Index settings

Some index settings are static and can only be set on index creation. That's why it is important to configure it - when you have specific whishes - before you start using an index.

You can find an example in opensearch.indices.default.settings. Default is the key as default / fallback configuration. When you want a setting for a specific index, you use opensearch.indices.yourSearchableAsValue.settings.

Mappings

Sometimes you need specific field mappings in OpenSearch. For example, when you use UUID's, the field type is automatically set to text and it can be usefull to have them as keyword in filters.

You can find an example in opensearch.indices.table.mappings. Table is in this case your index name.

Search

You can search data as documented by Laravel in their docs. Because this search query uses query_string in the search query to OpenSearch, it is possible to execute complex queries, such as:

• Star Trek
• the wind AND (rises OR rising)
• status:active Pencil

Cursor pagination

Cursor pagination uses search_after parameter pagination.

    Song::search("crass")
        ->orderBy("_score", "desc")
        ->orderBy("id")
        ->cursorPaginate(10);

If no sorting provided, the _id field will be used as default, and therefore no relevance sorting can be applied when using cursor pagination.

Cursor pagination with sort mode

    Song::search()
        ->orderByRaw(
            new FieldSort('stars', 'desc', ['mode' => 'avg'])
        )
        ->orderBy('id')
        ->cursorPaginate(10);

Cursor pagination with nested object sort

    Article::search()
        ->orderByRaw(
            (new FieldSort('comments.created_at', 'desc', ['mode' => 'max']))
                ->setNestedFilter(new NestedSort('comments'))
        )
        ->orderBy('id')
        ->cursorPaginate(10);

Cursor pagination with _geo_distance

    Store::search()
        ->orderByRaw(new FieldSort(
            '_geo_distance',
            'desc',
            [
                'point' => [10, 10],
                'unit' => 'km',
                'distance_type' => 'arc',
                'mode' => 'min',
                'ignore_unmapped' => true
            ]
        ))
        ->orderBy('id')
        ->cursorPaginate(10);