searchMeta returns different types of metadata result documents for MongoDB Search queries on the field or fields in an Atlas collection. The fields must be covered by a MongoDB Search index. See:
Index Definitions to learn more about creating and managing MongoDB Search indexes.
MongoDB Search Aggregation Pipeline Stages to learn more about the
$searchMetapipeline stage syntax, usage, and results.
重要
The $searchMeta aggregation pipeline stage is only available for collections hosted on MongoDB Atlas. To learn more, see MongoDB Search.