The ElasticSearch module for ProcessWire CMS/CMF will add your page content to an ElasticSearch index per site, and give you a convenient way to search it.
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- Make sure the PHP cURL library is installed. (apt-get install php5-curl)
- Install ElasticSearch.
- Install this module, the usual methods apply.
- In the module settings configure your ElasticSearch IP and port, and click save.
- In the module settings click "Index All Pages".
When pages are saved, deleted, trashed, and restored ElasticSearch will be notified accordingly, so after you've clicked "Index All Pages" you shouldn't need to think about it again.
Most content from a page should be seachable: text fields, translated fields, repeaters and filenames.
This module has a function search() that returns a PageArray.
$search_results = $modules->get('ElasticSearch')->search('foo bar');
The MarkupPagerNav module should work out of the box.
$search_results = $modules->get('ElasticSearch')->search('foo bar', $results_per_page);
echo "Total results: " . $search_results->getTotal();
echo $search_results->renderPagination();
The search function also takes a 3rd parameter to configure the minimum score required for a page to match.
$search_results = $modules->get('ElasticSearch')->search('foo bar', $results_per_page, 0.05);
By default this module uses a fuzzy_like_this query to match pages. To change that use an array for the 1st parameter when calling search.
$search_results = $modules->get('ElasticSearch')->search(array(
'query' => array(
'match' => array(
'_all' => 'foo bar',
),
),
));
This plugin will create an index based on the http host, so if you have many sites one one server they can all safely use the same ElasticSearch server, no special configuration is required to support multiple sites.
Configuring ElasticSearch can be very simple, if running ElasticSearch on a single server you really only need the below configuration in /etc/elasticsearch/elasticsearch.yml:
index.number_of_shards: 1
index.number_of_replicas: 0
discovery.zen.ping.multicast.enabled: false
discovery.zen.ping.unicast.hosts: []