Add a group sort field (group.sort parameter)

# SolrQuery::addGroupSortField

(PECL solr >= 2.2.0)

SolrQuery::addGroupSortField — Add a group sort field (group.sort parameter)

### 説明

public SolrQuery::addGroupSortField ( string `$field` [, int `$order` ] ) : SolrQuery

Allow sorting group documents, using group sort field (group.sort parameter).

### パラメータ

`field`

  Field name

`order`

  Order ASC/DESC, utilizes SolrQuery::ORDER_* constants

### 返り値

### 例

例1 SolrQuery::addGroupSortField() example

`<?php
$solrQuery = new SolrQuery('*:*');
$solrQuery
->setGroup(true)
->addGroupSortField('price', SolrQuery::ORDER_ASC);
echo $solrQuery;
?>`

上の例の出力は、 たとえば以下のようになります。

    q=*:*&group=true&group.sort=price asc

### 参考

- SolrQuery::setGroup() - Enable/Disable result grouping (group parameter)
- SolrQuery::addGroupField() - Add a field to be used to group results
- SolrQuery::addGroupFunction() - Allows grouping results based on the unique values of a function query (group.func parameter)
- SolrQuery::addGroupQuery() - Allows grouping of documents that match the given query
- SolrQuery::setGroupFacet() - Sets group.facet parameter
- SolrQuery::setGroupOffset() - Sets the group.offset parameter
- SolrQuery::setGroupLimit() - Specifies the number of results to return for each group. The server default value is 1
- SolrQuery::setGroupMain() - If true, the result of the first field grouping command is used as the main result list in the response, using group.format=simple
- SolrQuery::setGroupNGroups() - If true, Solr includes the number of groups that have matched the query in the results
- SolrQuery::setGroupTruncate() - If true, facet counts are based on the most relevant document of each group matching the query
- SolrQuery::setGroupFormat() - Sets the group format, result structure (group.format parameter)
- SolrQuery::setGroupCachePercent() - Enables caching for result grouping