參見(jiàn)

• SolrQuery::setExpand() - Enables/Disables the Expand Component
• SolrQuery::addExpandSortField() - Orders the documents within the expanded groups (expand.sort parameter)
• SolrQuery::removeExpandSortField() - Removes an expand sort field from the expand.sort parameter
• SolrQuery::setExpandRows() - Sets the number of rows to display in each group (expand.rows). Server Default 5
• SolrQuery::setExpandQuery() - Sets the expand.q parameter
• SolrQuery::addExpandFilterQuery() - Overrides main filter query, determines which documents to include in the main group