猫鼬:更改2dsphere索引版本

Question

我正试图将我的数据库上传到heroku mongodbLab插件。我的MongoDB版本为3.2.4，服务器为3.0.9。猫鼬是4.4.6。然而，当我运行命令$ mongorestore -h myhostname -d mydatabase -u username -p password ~/tmp/mongodump/Loc8r将db推到heroku时，我得到了错误：

building a list of collections to restore from /Users/user/tmp/mongodump/Loc8r dir
reading metadata for database.locations from /Users/user/tmp/mongodump/Loc8r/locations.metadata.json
restoring database.locations from /Users/user/tmp/mongodump/Loc8r/locations.bson
restoring indexes for collection database.locations from metadata
Failed: database.locations: error creating indexes for database.locations: createIndex error: exception: unsupported geo index version { 2dsphereIndexVersion : 2dsphereIndexVersion: 3 }, only support versions: [1,2]

如何在我的模式中更改2dsphereIndexVersion？

下面是我的db的模式文件：

var mongoose = require('mongoose');

var openingTimesSchema = new mongoose.Schema({
  days: {type: String, required: true},
  opening: String,
  closing: String,
  closed: {type: Boolean, required: true}
});

var reviewSchema = new mongoose.Schema({
  author: String,
  rating: {type: Number, required: true, min: 0, max: 5},
  reviewText: String,
  createdOn: {type: Date, "default": Date.now}
});

var locationSchema = new mongoose.Schema({
  name: {type:String, required: true},
  address: String,
  rating: {type: Number, "default": 0, min: 0, max: 5},
  facilities: [String],
  coords: {type: [Number], index: '2dsphere', "2dsphereIndexVersion": 2},
  openingTimes: [openingTimesSchema],
  reviews: [reviewSchema]
});

mongoose.model('Location', locationSchema);

如您所见，我试图通过添加属性"2dsphereIndexVersion": 2来更改它。然而，这是行不通的。有人知道我怎么能改变这个吗？

-编辑-我正在用上面的模式创建数据库。我试图将"2dsphereIndexVersion"设置为2，因为MongoDB的服务器版本需要它。

Answer 1

最后我将.metadata.json文件更改为如下所示：

{"options":{},"indexes":[{"v":1,"key":{"_id":1},"name":"_id_","ns":"Loc8r.locations"},{"v":1,"key":{"coords":"2dsphere"},"name":"coords_2dsphere","ns":"Loc8r.locations","background":true,"2dsphereIndexVersion":2}]}