$search (aggregation)

$search aggregation pipleline stage performs a full-text search of the field or fields in an Atlas collection. 聚合管道阶段对Atlas集合中的一个或多个字段执行全文搜索。The fields must be covered by an Atlas Search index. 这些字段必须包含在Atlas搜索索引中。See:请参阅：

• Index Definitions索引定义 to learn more about creating and managing Atlas Search indexes.了解有关创建和管理Atlas搜索索引的更多信息。
• Atlas Search Aggregation Pipeline StagesAtlas搜索聚合管道阶段 to learn more about the $search pipeline stage syntax and usage.了解有关$search pipeline阶段语法和用法的更多信息。
• $search Operators$search运算符 to learn more about the $search aggregation pipeline stage operators.了解有关$search聚合管道阶段运算符的更多信息。