(无版本信息可用，可能仅存在于 Git 中)
SolrQuery::collapse — 将结果集折叠为每个组一个文档
在将结果集转发到搜索组件的其余部分之前，将结果集折叠为每个组一个文档。
因此，所有下游组件（分面、突出显示等）都将使用折叠后的结果集。
collapseFunction
返回当前的 SolrQuery 对象
示例 #1 SolrQuery::collapse() 示例
<?php
include "bootstrap.php";
$options = array
(
'hostname' => SOLR_SERVER_HOSTNAME,
'login' => SOLR_SERVER_USERNAME,
'password' => SOLR_SERVER_PASSWORD,
'port' => SOLR_SERVER_PORT,
'path' => SOLR_SERVER_PATH
);
$client = new SolrClient($options);
$query = new SolrQuery('*:*');
$collapseFunction = new SolrCollapseFunction('manu_id_s');
$collapseFunction
->setSize(2)
->setNullPolicy(SolrCollapseFunction::NULLPOLICY_IGNORE);
$query
->collapse($collapseFunction)
->setRows(4);
$queryResponse = $client->query($query);
$response = $queryResponse->getResponse();
print_r($response);
?>上面的例子将输出类似于
SolrObject Object
(
[responseHeader] => SolrObject Object
(
[status] => 0
[QTime] => 1
[params] => SolrObject Object
(
[q] => *:*
[indent] => on
[fq] => {!collapse field=manu_id_s size=2 nullPolicy=ignore}
[rows] => 4
[version] => 2.2
[wt] => xml
)
)
[response] => SolrObject Object
(
[numFound] => 14
[start] => 0
[docs] => Array
(
[0] => SolrObject Object
(
[id] => SP2514N
[name] => Array
(
[0] => Samsung SpinPoint P120 SP2514N - hard drive - 250 GB - ATA-133
)
[manu] => Array
(
[0] => Samsung Electronics Co. Ltd.
)
[manu_id_s] => samsung
[cat] => Array
(
[0] => electronics
[1] => hard drive
)
[features] => Array
(
[0] => 7200RPM, 8MB cache, IDE Ultra ATA-133
[1] => NoiseGuard, SilentSeek technology, Fluid Dynamic Bearing (FDB) motor
)
[price] => Array
(
[0] => 92
)
[popularity] => Array
(
[0] => 6
)
[inStock] => Array
(
[0] => 1
)
[manufacturedate_dt] => 2006-02-13T15:26:37Z
[store] => Array
(
[0] => 35.0752,-97.032
)
[_version_] => 1510294336412057600
)
[1] => SolrObject Object
(
[id] => 6H500F0
[name] => Array
(
[0] => Maxtor DiamondMax 11 - hard drive - 500 GB - SATA-300
)
[manu] => Array
(
[0] => Maxtor Corp.
)
[manu_id_s] => maxtor
[cat] => Array
(
[0] => electronics
[1] => hard drive
)
[features] => Array
(
[0] => SATA 3.0Gb/s, NCQ
[1] => 8.5ms seek
[2] => 16MB cache
)
[price] => Array
(
[0] => 350
)
[popularity] => Array
(
[0] => 6
)
[inStock] => Array
(
[0] => 1
)
[store] => Array
(
[0] => 45.17614,-93.87341
)
[manufacturedate_dt] => 2006-02-13T15:26:37Z
[_version_] => 1510294336449806336
)
[2] => SolrObject Object
(
[id] => F8V7067-APL-KIT
[name] => Array
(
[0] => Belkin Mobile Power Cord for iPod w/ Dock
)
[manu] => Array
(
[0] => Belkin
)
[manu_id_s] => belkin
[cat] => Array
(
[0] => electronics
[1] => connector
)
[features] => Array
(
[0] => car power adapter, white
)
[weight] => Array
(
[0] => 4
)
[price] => Array
(
[0] => 19.95
)
[popularity] => Array
(
[0] => 1
)
[inStock] => Array
(
[0] =>
)
[store] => Array
(
[0] => 45.18014,-93.87741
)
[manufacturedate_dt] => 2005-08-01T16:30:25Z
[_version_] => 1510294336458194944
)
[3] => SolrObject Object
(
[id] => MA147LL/A
[name] => Array
(
[0] => Apple 60 GB iPod with Video Playback Black
)
[manu] => Array
(
[0] => Apple Computer Inc.
)
[manu_id_s] => apple
[cat] => Array
(
[0] => electronics
[1] => music
)
[features] => Array
(
[0] => iTunes, Podcasts, Audiobooks
[1] => Stores up to 15,000 songs, 25,000 photos, or 150 hours of video
[2] => 2.5-inch, 320x240 color TFT LCD display with LED backlight
[3] => Up to 20 hours of battery life
[4] => Plays AAC, MP3, WAV, AIFF, Audible, Apple Lossless, H.264 video
[5] => Notes, Calendar, Phone book, Hold button, Date display, Photo wallet, Built-in games, JPEG photo playback, Upgradeable firmware, USB 2.0 compatibility, Playback speed control, Rechargeable capability, Battery level indication
)
[includes] => Array
(
[0] => earbud headphones, USB cable
)
[weight] => Array
(
[0] => 5.5
)
[price] => Array
(
[0] => 399
)
[popularity] => Array
(
[0] => 10
)
[inStock] => Array
(
[0] => 1
)
[store] => Array
(
[0] => 37.7752,-100.0232
)
[manufacturedate_dt] => 2005-10-12T08:00:00Z
[_version_] => 1510294336562003968
)
)
)
)