Mongodb语句类型错误 [Error] invalid document for insert: keys cannot begin with “$“: “$numberDecimal“

Mongodb语句类型错误 [Error] invalid document for insert: keys cannot begin with "$": "$numberDecimal"

这个是Mongodb 驱动API给出的可执行日志， 但在mongo shell终端执行，却报错。  

只能说Mongodb的API设计太差了，自己的格式都不能兼容。累的就是一线的使用者。

db.orders.insertMany([{"_id": 10210, "name": "mongodb10", "total": {"$numberDecimal": "10.1"}, "num": 10, "abc": "test bee "},{"_id": 10211, "name": "mongodb11", "total": {"$numberDecimal": "11.11"}, "num": 11, "abc": "test bee "}])

错误信息：

> [Error] invalid document for insert: keys cannot begin with "$": "$numberDecimal"
at line 1, column 1
> 时间: 0.001s

https://www.mongodb.com/docs/manual/reference/mongodb-extended-json/#type-representations

"int32field":	{"$numberInt":"10"}	10
"int64Field":	{"$numberLong":"50"}	5