elasticsearch_helper_views is a module that provides a way to display Elasticsearch results using Drupal Views.

The module contains a Views query plugin Elasticsearch which acts as a bridge between Views display and Elasticsearch. The module defines an ElasticsearchQueryBuilder plugin type and an extendable base implementation which allows building Query DSL definition accepted by Elasticsearch client.

Given the arbitrary nature of Elasticsearch document properties, it's impossible to create a definitive list of field and filter plugins that cover all the data stored in Elasticsearch. For that reason for each data listing you might want to create your own views field and filter plugins that correspond to specific fields in the index. The same applies to Query DSL builder plugin which you will have to create on your own.

The following views field plugins are provided out of the box:

• Rendered entity plugin which displays rendered Drupal entities in pre-selected view mode per entity type; if Elasticsearch documents contain identification ID to other Drupal entities (e.g., author ID), Rendered entity plugin can be used to display entities of different types (together with provided views relationship plugin);
• Source field plugin which displays raw values from the Elasticsearch document _source array.

1. Install Elasticsearch search engine (how-to).
2. Install Elasticsearch Helper module, configure it and create indices using ElasticsearchIndex type plugins in a custom module.
3. Create an ElasticsearchQueryBuilder type plugin in a custom module.
4. If you want to create exposed filter in your view, you will have to create custom views filter plugins and define them in a hook_views_data_alter() hook for elasticsearch_result data type.
5. Create a view and select Elasticsearch result as a data type.
6. In a view configuration form click on the Query settings link and select the query building plugin that will generate Query DSL for this particular view.
7. Save the view.

Add the following snippet to composer.json file and run composer require maijs/elasticsearch_helper_views to have the module added to your project.

{
    "repositories": [
        {
            "name": "maijs/elasticsearch_helper_views",
            "type": "vcs",
            "url": "https://github.com/maijs/elasticsearch_helper_views.git"
        }
    ]
}