Flutter Firestore offline persistent

Question

I want to use offline firestore persistent, but I don't get the right code. On the kotlin tutorial said like this :

db.collection("members").document()
    .addSnapshotListener(object : EventListener<DocumentSnapshot> {
        override fun onEvent(snapshot: DocumentSnapshot?,
                            e: FirebaseFirestoreException?) {
            if (e != null) {
                Log.w(ContentValues.TAG, "Listen error", e)
                err_msg.text = e.message
                err_msg.visibility = View.VISIBLE;
                return
            }
            snapshot?.reference?.set(data)
            val intent = Intent()
            setResult(Activity.RESULT_OK, intent)
            [email protected]()
        }
    }
)

I try to use this code on flutter :

Firestore.instance.collection("hega").document().setData(data);

And also try this :

Firestore.instance.collection("hega").add(data);

Both works if online but not working when device is offline (using airplane mode)

UPDATE: So above code are actually works offline.

Firestore.instance.collection("hega").document().setData(data);

I just need to setup stream listener to the document snapshot, to see that the data is added to the local cache. But the other problem is when the device comes online, the offline data is not synced to server.

Nope, I just found a tutorial how to use firestore offline on kotlin. And i want to use it on flutter dart. — Apin
– Apin, Commented Oct 1, 2018 at 22:45
How did you solve this with flutter ? can you please write your code of how to make sure document is completed writing to cache ? — Saeed isa
– Saeed isa, Commented Feb 17, 2024 at 7:14

Omatt · Accepted Answer · 2021-11-26 14:28:43Z

3

You can enable offline data persistence like so as mentioned in the flutterfire docs.

For web

await FirebaseFirestore.instance.enablePersistence();

For other platforms

FirebaseFirestore.instance.settings = Settings(persistenceEnabled: false);

answered Nov 26, 2021 at 14:28

Omatt

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