node.js - Node.js 中的 Mongo : Can't canonicalize query: BadValue geoNear must be top-level expr

Question

我这里有一个基于几何的查询，它嵌套在 $or 中并与 $and 运算符组合。

Mongo 不断抛出以下错误:

 MongoError: Can't canonicalize query: BadValue geoNear must be top-level expr

我正在使用 native Mongo Node 驱动程序与 1.4.3。我看到一个类似的错误发布 here .

这是我构建查询错误的情况，还是我应该向 Mongo 提交错误？

{
    "$or": [
        {
            "$and": [
                {
                    "startDate": {
                        "$gt": "2013-12-27T08:00:00.000Z"
                    }
                },
                {
                    "startDate": {
                        "$lt": "2013-02-08T08:00:00.000Z"
                    }
                },
                {
                    "loc": {
                        "$near": {
                            "$geometry": {
                                "type": "Point",
                                "coordinates": [
                                    123.3423,
                                    22.2131
                                ]
                            },
                            "$maxDistance": 4
                        }
                    }
                }
            ]
        },
        {
            "$and": [
                {
                    "startDate": {
                        "$gt": "2013-12-27T08:00:00.000Z"
                    }
                },
                {
                    "startDate": {
                        "$lt": "2013-02-08T08:00:00.000Z"
                    }
                }
            ]
        }
    ]
}

Answer 1

我认为这是 2.6 版中对 $or 和地理查询的限制:

$or and GeoSpatial Queries

Changed in version 2.6.

$or supports geospatial clauses with the following exception for the near clause (near clause includes $nearSphere and $near). $or cannot contain a near clause with any other clause.

http://docs.mongodb.org/manual/reference/operator/query/or/

换句话说，不是错误而是功能