FieldValue.increment for Cloud Firestore in Flutter

This has been added to the cloud_firestore Flutter plugin as of version 0.10.0.

You can use FieldValue.increment with a double (e.g. FieldValue.increment(1.0)) or an int (e.g. FieldValue.increment(2)).

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Here is the relevant pull request.

^{If anyone reads this before the version is pushed to Pub: The link to the version will not yet work, but in the meantime you can use this Git commit, which contains a fix I did.}

As far as I can see in the change log for FlutterFire, the increment operator has not been added yet.

I added a feature request to the repo.

User that Import:

import 'package:cloud_firestore/cloud_firestore.dart';

For Increment:

await FirebaseFirestore.instance.collection('post').doc(postId).update({"like": FieldValue.increment(1)});

For Decrement:

await FirebaseFirestore.instance.collection('post').doc(postId).update({"like": FieldValue.increment(-1)});