node.js - Mongoose/MongoDB 地理空间索引不起作用

Question

第一次使用MongoDD。我已经在互联网上搜索了几个小时，试图找出我做错了什么。MongoDB 告诉我执行地理查询后不存在索引。

我已经包括了错误。有任何想法吗？

架构

var locationPolygonSchema = new Schema({
  type: {
    type: String,
    index: true,
    default: 'Polygon'
  },
  loc: {
    type: [Number],
    index: '2dsphere'
  }
});

var developerSchema = new Schema({
    locationPolygon: locationPolygonSchema
});

developerSchema.index({locationPolygon: 1});
developerSchema.set('autoIndex', true);

文件

{
    ...
	locationCoords: [-122.47020789999999, 37.6879241]
	locationName: "Daly City, CA, USA"
	locationPolygon: {
		type: "Polygon",
		coordinates: [[[9129,1773], [8291, -4891]]]
	},
	locationRadius: 20
    ...
}

错误

{
	"$err": "Unable to execute query: error processing query: ns=whenrecruited.developers limit=21 skip=0" +
		"Tree: GEONEAR  field=locationPolygon maxdist=1.79769e+308 isNearSphere=0" +
		"Sort: {}" +
		"Proj: {}" +
		"planner returned error: unable to find index for $geoNear query",
	"code": 17007,
	"message": "Unable to execute query: error processing query: ns=whenrecruited.developers limit=21 skip=0" +
		"Tree: GEONEAR  field=locationPolygon maxdist=1.79769e+308 isNearSphere=0" +
		"Sort: {}" +
		"Proj: {}" +
		"planner returned error: unable to find index for $geoNear query",
	"name": "MongoError"
}