请教一个 mongodb 创建唯一索引的问题

[checgg]

db.collection.createIndex({name:1},{unique:true})

name:1

这个 1 应该如何理解?

[checgg]

已解决，没好好看文档。打扰了各位。

The value of the field in the index specification describes the kind of index for that field. For example, a value of 1 specifies an index that orders items in ascending order. A value of -1 specifies an index that orders items in descending order. For additional index types, see index types.