使用$ nearSphere

Question

我的地方集合中有以下行。

{ "_id" : ObjectId("572b3892967c76c62b7f63e3"), "loc" : { "type" : "Point", "coordinates" : [ -73.97, 40.77 ] }, "name" : "Central Park", "category" : "Parks" }

{ "_id" : ObjectId("572b38ba967c76c62b7f63e4"), "loc" : { "type" : "Point", "coordinates" : [ -73.88, 40.78 ] }, "name" : "La Guardia Airport", "category" : "Airport" }

我无法执行以下查询

db.places.find({$nearSphere: {$geometry: { type: "Point", coordinates: [-73.92, 40.775]}, $minDistance: 10000, $maxDistance: 10}})

我收到以下错误： Error: error: { "$err" : "Can't canonicalize query: BadValue unknown top level operator: $nearSphere", "code" : 17287 }

请告诉我这是什么问题。

Answer 1

在查询对象中，＆＃34; loc＆＃34;字段丢失。此外，我认为你宣布minDistance和maxDistance错误，因为maxDistanace＆lt; minDistance才会。

我认为您想要的查询类似于：

db.places.find({loc:{$nearSphere: {$geometry: { type: "Point", coordinates: [-73.92, 40.775]}, $minDistance: 10, $maxDistance: 10000}}})