Question

Azure Cosmos DB似乎不支持对数组属性的查询（不是关于MongoDB语法的问题）。

预期，在v3.4.9本地工作：

> db.test.insertOne({'Name': 'Bob', Children: ['Rex']})
> db.test.find({Children: {$exists: true, $not: {$size: 0}}})
{ "_id" : ObjectId("59baff11002b35f7ea2864a4"), "Name" : "Bob", "Children" : [ "Rex" ] }

> db.test.find({$where: 'this.Children.length>0'})
{ "_id" : ObjectId("59baff11002b35f7ea2864a4"), "Name" : "Bob", "Children" : [ "Rex" ] }

在Azure Cosmos DB上：

> db.test.insertOne({'Name': 'Bob', Children: ['Rex']})
> db.test.find({Children: {$exists: true, $not: {$size: 0}}})
Error: error: {
    "_t" : "OKMongoResponse",
    "ok" : 0,
    "code" : 2,
    "errmsg" : "Request is malformated",
    "$err" : "Request is malformated"

> db.test.find({$where: 'this.Children.length>0'})
Error: error: {
    "_t" : "OKMongoResponse",
    "ok" : 0,
    "code" : 2,
    "errmsg" : "Request is malformated",
    "$err" : "Request is malformated"
}

如何找到子项存在但不为空的项目？

更新

本地主机：

> db.test.find({ "Children.0": { "$exists": true }})
{ "_id" : ObjectId("59baff11002b35f7ea2864a4"), "Name" : "Bob", "Children" : [ "Rex" ] }

Cosmos DB：

> db.test.find({ "Children.0": { "$exists": true }})
>

Azure Cosmos DB上的$ size和$ not MongoDB查询失败

0 个答案: