Javascript 异常:geoNear命令失败:errmsg:多个二维索引

Javascript 异常:geoNear命令失败:errmsg:多个二维索引,javascript,mongodb,mongoose,geometry,aggregation-framework,Javascript,Mongodb,Mongoose,Geometry,Aggregation Framework,我正在尝试按距离从集合中检索文档。我尝试使用$geoNear聚合,但我要么遇到错误(使用node.js和postman),要么返回0条记录 示例文档: { "_id" : ObjectId("5cc37692fe9fd54b3cd136c9"), "category" : "art", "description" : "an eastbound description for The soda event.", "geometry" : { "ty

我正在尝试按距离从集合中检索文档。我尝试使用
$geoNear
聚合,但我要么遇到错误(使用node.js和postman),要么返回0条记录

示例文档:

{
    "_id" : ObjectId("5cc37692fe9fd54b3cd136c9"),
    "category" : "art",
    "description" : "an eastbound description for The soda event.",
    "geometry" : {
        "type" : "Point",
        "coordinates" : [ 
            3.60178480057443, 
            6.46123057784917
        ]
    }
    "__v" : 0
}
.
.
型号:

const GeoSchema = new Schema({
  type: {
    type: String,
    default: "Point"
  },
  coordinates: {
    type: [Number],
    index: "2dsphere"
  }
}, { _id: false });

const EventSchema = new Schema({
  category: String,
  description: String,
  geometry: GeoSchema,
});
查询

db.events.aggregate([
   {
     $geoNear: {
        near: { type: "Point", coordinates: [3.60178480057443, 6.46123057784917] },
        distanceField: "dist",
        maxDistance: 90000,
        spherical: true
     }
   }
]);
运行上述查询将返回零结果、空数组(在postman上),有时会显示此错误:

{
    "name": "MongoError",
    "errmsg": "exception: geoNear command failed: { ok: 0.0, errmsg: \"more than one 2d index, not sure which to run geoNear on\" }",
    "code": 16604,
    "ok": 0
}

当显示此错误时,我运行
db.events.dropIndex
函数。我复制并粘贴了文档中使用的示例,效果很好。请问我如何使这个$geoNear函数工作。我已经为此挣扎了一整天

单个集合不能有多个
2dsphere
索引,并且您已通过运行以下命令在多个字段上创建了
2dsphere
索引

db.getCollection('test').createIndex({ "loc": "2dsphere" }) 
因此,删除其中一个索引,它将得到工作。您可以使用以下命令检查索引列表

db.getCollection('test').getIndexes()
更新:

{
    "_id" : ObjectId("5cc37692fe9fd54b3cd136c9"),
    "category" : "art",
    "description" : "an eastbound description for The soda event.",
    "geometry" : {
        "type" : "Point",
        "coordinates" : [ 
            3.60178480057443, 
            6.46123057784917
        ]
    }
    "__v" : 0
}
.
.
若集合具有多个索引,则可以使用参数指定要在哪个字段上进行搜索