【发布时间】：2017-05-28 02:42:57
【问题描述】：
我目前有一个 Mongo DB 数据库，其中包含一个集合（“位置”）和一个文档：
{
"_id" : ObjectId("5875653b89513c8328416522"),
"name" : "Starcups",
"address" : "125 High Street, Reading, RG6 1PS",
"rating" : 3,
"facilities" : [
"Hot drinks",
"Food",
"Premium wifi"
],
"coords" : [
-0.9690884,
51.455041
],
"openingTimes" : [
{
"days" : "Monday - Friday",
"opening" : "7:00am",
"closing" : "7:00pm",
"closed" : false
},
{
"days" : "Saturday",
"opening" : "8:00am",
"closing" : "5:00pm",
"closed" : false
},
{
"days" : "Sunday",
"closed" : true
}
],
"reviews" : [
{
"author" : "Simon Holmes",
"id" : ObjectId("5875663389513c8328416523"),
"rating" : 5,
"timestamp" : ISODate("2013-07-15T23:00:00Z"),
"reviewText" : "What a great place. I can't say enough good things about it."
}
]
}
我需要将字段“id”（子文档评论的一部分）更改为“_id”。我已经尝试过，在 StackExchange 上使用其他类似的示例，以下代码无济于事：
db.locations.update({}, {$rename:{"reviews.id":"reviews._id"}}, false, true);
但我收到以下错误：
WriteResult({
"nMatched" : 0,
"nUpserted" : 0,
"nModified" : 0,
"writeError" : {
"code" : 16837,
"errmsg" : "cannot use the part (reviews of reviews.id) to traverse the element ({reviews: [ { author: \"Simon Holmes\", id: ObjectId('5875663389513c8328416523'), rating: 5.0, timestamp: new Date(1373929200000), reviewText: \"What a great place. I can't say enough good things about it.\" } ]})"
}
})
当我尝试更改任何其他字段时，我得到了同样的错误。有人能指出我正确的方向吗？
更新：
这似乎是评估子文档字段的问题，因为以下代码执行良好：
db.locations.update({}, {$rename:{"name":"names"}}, false, true);
我也试过搜索相关文档：https://docs.mongodb.com/manual/reference/operator/update/rename/
【问题讨论】：
标签： json node.js mongodb mongoose database