Mongoose / MongoDB地理空间索引无法正常工作

Question

第一次使用MongoDD。我一直在梳理互联网几个小时试图弄清楚我做错了什么。 MongoDB告诉我在执行地理查询后没有索引。

我已经包含了错误。有什么想法吗？

架构

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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);

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文件

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

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错误

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{
	"$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"
}

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