Mongodb 使用$set更新字段时会出现不同的值

我试图更新数据库中的一个字段，结果非常混乱：

查看字段“zipcode” 在此之前：

''

之后

然而，我试图把不同的价值

> db.users.find()
{ "_id" : ObjectId("51265a5ebdbff320f02007a4"), "region_code" : "NY", "region_name" : "New York", "secret_answer2" : "Mercedes", "l_name" : "Gonzalez", "f_name" : "Zachary", "month" : 5, "country_name" : "United States", "country_code" : "US", "year" : 1970, "password" : "xxxxxx", "day" : 2, "metrocode" : "501", "city" : "New York", "secret_answer" : "xxxxxx", "zipcode" : "", "longitude" : xxxxxxx, "areacode" : "212", "ip" : "xxxxxxx", "latitude" : xxxxxx }
> db.users.update({_id: ObjectId("51265a5ebdbff320f02007a4")}, {$set: {zipcode:02201} } )
> db.users.find()
{ "_id" : ObjectId("51265a5ebdbff320f02007a4"), "region_code" : "NY", "region_name" : "New York", "secret_answer2" : "Mercedes", "l_name" : "Gonzalez", "f_name" : "Zachary", "month" : 5, "country_name" : "United States", "country_code" : "US", "year" : 1970, "password" : "xxxxxx", "day" : 2, "metrocode" : "501", "city" : "New York", "secret_answer" : "xxxxxx", "zipcode" : 1153, "longitude" : xxxxxxx, "areacode" : "212", "ip" : "xxxxxxx", "latitude" : xxxxxx }

更新：

---

在JavaScript中，以0开头的数字被解释为八进制

因此，将

zipcode

值存储为字符串：

{$set: {zipcode: '02201'}}

或使用十进制值：

{$set: {zipcode: 2201}}

{$set: {zipcode: '02201'}}

{$set: {zipcode: 2201}}