geofirestore

You can install GeoFirestore via npm:

npm install geofirestore

Or you can use GeoFirestore via CDN:

<script src="https://unpkg.com/geofirestore/dist/geofirestore.js"></script>

Assume you are building an app to rate bars and you store all information for a bar, e.g. name, business hours and price range, and you want to add the possibility for users to search for bars in their vicinity. This is where GeoFirestore comes in. You can store each bar using GeoFirestore, using the location to build an easily queryable document. GeoFirestore then allows you to easily query which bars are nearby in a simalar fashion as geofire but will also return the bar information (not just the key or location).

Examples

You can find a full list of our demos and view the code for each of them in the examples directory of this repository. The examples cover some of the common use cases for GeoFirestore.

Full documentation is available at https://geofirestore.com. It mostly provides the same functionality as the Firestore library, in almost the same way as the Firestore library. Many questions can be addressed by looking at the Firestore docs. However there are a few differences, and below is a little example of how to make a location based query.

import * as firebase from 'firebase/app';
import 'firebase/firestore';
import * as geofirestore from 'geofirestore';


// Initialize the Firebase SDK
firebase.initializeApp({
  // ...
});

// Create a Firestore reference
const firestore = firebase.firestore();

// Create a GeoFirestore reference
const GeoFirestore = geofirestore.initializeApp(firestore);

// Create a GeoCollection reference
const geocollection = GeoFirestore.collection('restaurants');

// Add a GeoDocument to a GeoCollection
geocollection.add({
  name: 'Geofirestore',
  score: 100,
  // The coordinates field must be a GeoPoint!
  coordinates: new firebase.firestore.GeoPoint(40.7589, -73.9851)
})

// Create a GeoQuery based on a location
const query = geocollection.near({ center: new firebase.firestore.GeoPoint(40.7589, -73.9851), radius: 1000 });

// Get query (as Promise)
query.get().then((value) => {
  // All GeoDocument returned by GeoQuery, like the GeoDocument added above
  console.log(value.docs);
});

Simple. Easy. And very similar with how Firestore handles a get from a Firestore Query. The difference being the added ability to say query near a center point, with a set radius in kilometers.

Compound Queries

Internally GeoFirestore creates multiple geohashes around a requested area. It then makes multiple inequality (<, <=, >, >=) queries and joins them together into one response. Unfortunately compound queries with inequalities or additional filtering methods such as orderBy, startAt and endAt are impossible with Firestore. To better understand this limitation, see the Firestore docs here.

Data Structure

Documents generated and stored in your Firestore collection by GeoFirestore are typed/structured as:

interface GeoDocumentData {
  g: {
    geohash: string;
    geopoint: GeoPoint;
  };
  [field: string]: any;
  }

• g.geohash is the geohash generated by the library, and is required in order to make the geoqery.
• g.geopoint is the GeoPoint used to generate the g.geohash field.

Data must be structured this was in order to work, and is why you should use the GeoFirestore library to insert data in order to be able to query it.

Security Rules

Because GeoFirestore adds the g field and expects a coordinates field, be sure to update your Firebase Security Rules to reflect the new fields. While not necessary for all applications, the rules below are an example of how you'd check for GeoFirestore specific fields.

match /collection/{key} {
  allow write: // Your previous rules here...
               && request.resource.data.g.size() == 2
               && request.resource.data.g.geohash is string
               && request.resource.data.g.geopoint is latlng
               && request.resource.data.coordinates is latlng
}

limit()

The limit filtering method is exposed through GeoFirestore, however there are some unique considerations when using it. Limits on geoqueries are applied based on the distance from the center. Geoqueries require an aggregation of queries. When performing a geoquery the library applies the limit on the client. This may mean you are loading to the client more documents then you intended. Use with this performance limitation in mind.

GeoFirestore v4.0.0+ is incompatiable with previous versions. To migrate an older GeoFirestore collection please try using this script. Be sure to read over it before executing it, it is a use at your own risk bit of code.