Extension:CirrusSearch/de

Die CirrusSearch-Erweiterung implementiert eine Suchfunktion in MediaWiki, die Elasticsearch benutzt.

Diese Seite beschreibt die Installation. Nach erfolgreicher Installation geht es bei weiter zur Benutzung.

Projektziele

 * Keine seltsamen Abhängigkeiten, die die Installation erschweren
 * Die einzigen Abhängigkeiten sollten reine PHP-Mediawiki-Erweiterungen und Elasticsearch selbst sein
 * Einen nahezu in Echtzeit aktualisierten Suchindex für Wikiseiten bereitstellen, der durch andere MediaWiki-Erweiterungen erweiterbar ist.
 * Alle Abfrageoptionen bereitstellen, die Usern lieferte und mehr

Abhängigkeiten

 * PHP und cURL
 * Zusätzlich zu den Mediawiki-Standard-Anforderungen an PHP, muss PHP für CirrusSearch mit cURL-Support kompiliert worden sein.
 * Elasticsearch
 * You will need to install Elasticsearch.

Take note that a Java installation like OpenJDK is needed in addition.


 * Elastica
 * Elastica is a PHP library to talk to Elasticsearch. Install Elastica per the instructions below.
 * Other
 * Due to the actual handling of jobs by the CirrusSearch extension, it's advisable to set up jobs in redis to prevent messages like Notice: unserialize: Error at offset 64870 of 65535 bytes in JobQueueDB.php and subsequent errors like Unsupported operand types. See.

Even though the instructions below tell you to only run Composer when installing from git, it may be necessary to issue it anyway in order to install all PHP dependencies.

Upgrading
Please follow the upgrade instructions in the CirrusSearch file.

Configuration
The configuration options of CirrusSearch are documented at the file, and also in the  file.

See also documentation on CirrusSearch configuration profiles.

Hooks
CirrusSearch extension defines a number of hooks that other extensions can make use of to extend the core schema and modify documents. The following hooks are available:


 * - allows to hook into the configuration for analysis
 * - allows configuration of the mapping of fields
 * - allows extensions to modify ElasticSearch document produced from a page
 * - allows extensions to process incoming and outgoing links for the document
 * - called when a batch of pages has been indexed
 * - allows extensions to add query parser features
 * - allows extensions to define rescore builder functions

API
CirrusSearch features can be used in API queries. A few examples and queries:


 * Use the  special prefix to find pages related to Marie Curie and radium: api.php?action=query&list=search&srsearch=morelike:Marie_Curie%7Cradium&srlimit=10&srprop=size&formatversion=2


 * parameter: 2014?action=cirrusdump
 * parameter to Special:Search queries: https://en.wikipedia.org/wiki/Special:Search/cat%20dog%20chicken?cirrusDumpQuery
 * parameter to Special:Search queries: https://en.wikipedia.org/wiki/Special:Search/cat%20dog%20chicken?cirrusDumpResult
 * An additional parameter,, can be passed with   to have the Lucene explanation of the score included with the result dump: https://en.wikipedia.org/wiki/Special:Search/cat%20dog%20chicken?cirrusDumpResult&cirrusExplain
 * , ,   modules to obtain dump from the CirrusSearch setup: api.php?action=cirrus-config-dump&formatversion=2

Local development
Elastic Search service can be run with the Vagrant role and MediaWiki Vagrant.

For Docker, you can use a command like. Then follow the installation and configuration directions. If your web host is in a container you'll want to make sure the above container is on the same network, and in LocalSettings.php you will want to reference  as the host name. This will not have the WMF plugins but can be sufficient for basic testing.