得到solr中多值字段的计数

Question

在solr中，我有一个名为animal的multiValued字段，它的值为{cat，dog}，是否可以获取solr中multiValued字段内的值数（在我的示例2中）？

Answer 1

如果要计算多值字段中的项目，请使用CountFieldValuesUpdateProcessorFactory

Answer 2

There is no direct way to get the count of items in a multivalued field.
You can always maintain the field count during indexing and use it.

If not using during query time, you can always count the list size.