猫鼬，索引位置数组 [英] Mongoose, index locations array

问题描述

我在文档中有一个位置数组，我想在该数组上添加2dSpere索引.有可能吗?

I have an array of locations in a document and I want to add a 2dSpere index on that array. Is that possible?

var LocationSchema = new Schema({
  type: { type: String, required: true },
  geometry: {
    type: { type: String, required: true },
    coordinates: { type: Array, required: true}
  },
  properties: Schema.Types.Mixed
});

// Collection to hold users
var UserSchema = new Schema({
    username: { type: String, required: true, unique: true },
    locations: [LocationSchema]
  },{ 
    versionKey: false
  }
);

如何在locations数组中的geometry字段上添加2DSphere索引?

How do I add a 2DSphere index on the geometry field in the locations array?

推荐答案

https://github.com/LearnBoost/mongoose/blob/master/examples/geospatial/geoJSONSchema.js#L19

LocationSchema.index({'geometry':'2dsphere'});

LocationSchema.index({ 'geometry' : '2dsphere' });

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