The new Firestore DB allows me to store GeoPoints. Is there a way to query based on them?
So for example if each of my collections documents got a location
field of the type geopoint
. How can I get the closest 10 documents to an arbitrary coordinate?
The documentation doesn't seem to cover this. I tried stuff like this:
someRef.where('location', '>', geopoint).limit(10).get();
Obviously this doesn't make much sense but I'm just trying out some stuff here 😅
We haven't exposed geoqueries yet, so currently there isn't a way to do this.
Historically, the Firebase Realtime Database used geohashes in a library called GeoFire --but given that we plan to expose actual geoqueries in the near future, we haven't updated that library to Firestore. To learn how to do something similar yourself though, have a look at this video .
A new project has been introduced since @problemsofsumit first ask this question. The project is called GEOFirestore.
With this library you can perform queries like query documents within a circle:
const geoQuery = geoFirestore.query({
center: new firebase.firestore.GeoPoint(10.38, 2.41),
radius: 10.5
});
You can install GeoFirestore via npm. You will have to install Firebase separately (because it is a peer dependency to GeoFirestore):
$ npm install geofirestore firebase --save
You can link to it via cdn: https://cdn.jsdelivr.net/npm/geofirestore@2.2.2/dist/geofirestore.min.js
You could let Algolia do the geo search with radius for you. All it would require is to build a cloud function that triggers on your wanted documents and sync them to Algolia.
Take a look at Geo Search https://www.algolia.com/doc/guides/searching/geo-search/
Also Firebase documentation advertises Algolia as a solution to complex searches here https://firebase.google.com/docs/firestore/solutions/search
Rather than use third party services like Algolia I would use the new library that came out for both iOS and Android that replicates GeoFire for Firestore. The new library, called GeoFirestore , is fully documented and well tested. I have used this library already in many demo projects and it seems to work perfectly. Give it a shot!
After scouting the net, i found this GeoFirestore library by chintan369 that you could use to query nearby geopoints. The queries are based on Firestore native queries. Just add below line into your build.gradle
(project-level):
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
Then add the library to your build.gradle
(app-level):
dependencies {
implementation 'com.github.chintan369:Geo-FireStore-Query:1.1.0'
}
...and sync your project.
Visit https://medium.com/android-kotlin/geo-firestore-query-with-native-query-bfb0ac1adf0a for more.
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