Search API Elasticsearch Attachments

Elasticsearch is generally used to index data of types like string, number, date, etc. However, what if you wanted to index a file like a .pdf or a .doc directly and make it searchable?
This module allows Drupal to index files (attachments) to Elasticsearch by making use of Elasticsearch data type “attachment”.

Requirements

This module requires:

• Drupal 8
• Search API Module
• Elasticsearch Connector module (Alpha 1) - do not use dev
• Elasticsearch Version 5.6
• Elasticsearch mapper-attachments plugin

Elasticsearch Plugin Installation

The first step is to install the Elasticsearch plugin: mapper-attachments, which enables ES to recognise the “attachment” data type. In turn, it uses Apache Tika for content extraction and supports several file types such as .pdf, .doc, .xls, .rtf, .html, .odt, etc.

$ES_HOME:> bin/elasticsearch-plugin install mapper-attachments

Thats the hard work done.

Install this module with composer

composer require drupal/search_api_elasticsearch_attachments

This will auto install the search_api_elasticsearch_attachments module and also install the elasticsearch_connector module
There are a number of patches required to elasticsearch_connector module. These are applied automatically by composer. Sit back and let composer do the hard work for you. Patches that will get auto applied by composer:

• Issue #2926853 by dakku: Allow hook for altering getSearchQueryOptions
• Issue #2927465 by dakku: Allow option for altering IndexFactory Settings & Options
• Issue #2930819 by dakku: Allow option for altering MappingFactory Options
• Issue #2932003 by dakku: Allow option for altering SearchBuilder:build $params
• Issue #2932301 by dakku: Allow option for altering IndexFactory:mapping $params

Elasticsearch Attachments Configuration

Enable and Configure the Elasticsearch Attachments Processor