如题，我知道如下这样可以在文档中嵌入一个文档：db.insertdb.insert({_id:2,by:'测试',auther:{name:'小明',age:23}})但不知怎么嵌入多个，还有如何在一个已有文档中新添一个子文档，求mongodb前辈告知，多谢！
db.insertdb.insert({_id:2,by:'测试',auther:{name:'小明',age:23}})
Save author as array author: [{name: 1},{name:2}]
author: [{name: 1},{name:2}]
mongodb has $push operation
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Save author as array
author: [{name: 1},{name:2}]mongodb has $push operation