SolrCollapseFunction::setNullPolicy()
(PECL solr >= 2.2.0)
Sets the NULL Policy
说明
public SolrCollapseFunction::setNullPolicy(string $nullPolicy): SolrCollapseFunction
Sets the NULL Policy. One of the 3 policies defined as class constants shall be passed. Accepts ignore, expand, or collapse policies.
参数
- $nullPolicy
返回值
SolrCollapseFunction