Unable to find index for $geoNear query error with mongoose - node.js

Question

I have the following codes which try to create secondary indexes with mongoose. I have followed the mongoose official document to implement it ( mongoose documentation: Indexes section). However, when I send a GET request through Postman, an error, "unable to find index for $geoNear query", occurs. My understanding is that in my case, location is equivalent to a $geoNear object, so my code should be fine (I know it's not fine. That's why I have got an error). Any comments or suggestions would be greatly appreciated.
app.js(get endpoint)
app.get('/api/stores', (req, res) => {
const zipCode = req.query.zip_code;
const googleMapsURL = "https://maps.googleapis.com/maps/api/geocode/json";
axios.get(googleMapsURL, {
params: {
address: zipCode,
key : "KEY"
}
}).then((response) => {
const data = response.data
const coordinates = [
data.results[0].geometry.location.lng,
data.results[0].geometry.location.lat,
]
Store.find({
location: {
$near: {
$maxDistance: 3218,
$geometry: {
type: "Point",
coordinates: coordinates
}
}
}
}, (err, stores)=> {
if (err) {
console.log(err);
res.status(500).send(err);
} else {
res.status(200).send(stores);
}
})
}).catch((error)=> {
console.log(error);
})
})
store.js
const mongoose = require('mongoose');
const storeSchema = mongoose.Schema({
storeName: String,
phoneNumber: String,
address: {},
openStatusText: String,
addressLines: Array,
location: {
type: {
type: String,
enum: ['Point'],
required: true
},
coordinates: {
type: [Number],
required: true
}
}
})
storeSchema.index({ location : "2dsphere"}, {sparse: true});
module.exports = mongoose.model('Store', storeSchema);

Answer 1

When creating a new index in MongoDB, you may have to drop the table as to have the index apply properly. Try creating the index on a fresh table. Does that work?

Answer 2

I figured out this error by first creating a new database and collection(I was using the default database named <dbname>). When I sent a POST request with the data I would like to store in MongoDB, MongoError: Can't extract geo keys appeared. I fixed this error by following this thread(reference). After these steps, my GET request worked and indexes were successfully created.