mongoose地理位置+距离查询

const locationSchema = new Schema({
  name: String,
  location: {
    type: Schema.Types.Point,
    coordinates: [Number] // [longitude, latitude]
  }
});

Model.find({
  location: {
    $near: {
      $geometry: {
        type: "Point",
        coordinates: [longitude, latitude]
      },
      $maxDistance: distance // in meters
    }
  }
});

Model.aggregate([
  {
    $geoNear: {
      near: {
        type: "Point",
        coordinates: [longitude, latitude]
      },
      distanceField: "distance", // field to store calculated distance
      maxDistance: distance, // in meters
      spherical: true
    }
  },
  {
    $sort: {
      distance: 1 // sort by distance in ascending order
    }
  }
]);