cachapa / sqlite_crdt Goto Github PK

I currently build and use the package pocketbase_drift which is a dart native client for pocketbase and uses drift as the Sqlite3 layer.

I ended up doing something very similar to a CRDT for the sync (deleted, timestamp, synced) which was possible with the added columns.

As I am looking into this package more I think that this might be a good fit. But would like to make a drift_crdt first or sqlite3_crdt client first. Sqlite3 being an FFI based package.

Curious about your thoughts on this in regards to pocketbase being the source of truth on the server running SQLite, having hooks and can be extended as a framework. Looking through the code I want to find a way to call getChangeSet for a user and only sync specific tables and ones only needed for the user. It wasnt clear to me if the crdt_sync was syncing the whole database to every peer or just the user data.

The applications I am working on are all offline first and have highly connected peers.

Discussed in #8

Unhandled exception:
type 'SelectInsertSource' is not a subtype of type 'ValuesSource' in type cast
#0      TimestampedCrdt._insert (package:sql_crdt/src/timestamped_crdt.dart:28:32)
#1      SqlCrdt._insert (package:sql_crdt/src/sql_crdt.dart:28:17)
#2      BaseCrdt.execute (package:sql_crdt/src/base_crdt.dart:48:13)
#3      main (file:///home/mochar/dev/garbage/crdt_insert_bug/main.dart:27:14)
<asynchronous suspension>

import 'package:sqlite_crdt/sqlite_crdt.dart';

Future<void> onCreate(BaseCrdt crdt, int version) async {
    await crdt.execute('''
        CREATE TABLE test (
            a INTEGER,
            b INTEGER
        )
    ''');
    await crdt.execute('''
        CREATE TABLE test2 (
            a INTEGER,
            b INTEGER
        )
    ''');
}

void main() async {
    final db = await SqliteCrdt.open('/tmp/a.sqlite',
        version: 1,
        onCreate: onCreate);
    
    await db.execute('''
    INSERT INTO test(a, b) VALUES (1, 2)
    ''');

    await db.execute('''
    INSERT INTO test2(a, b)
    SELECT a, b
    FROM test
    ''');
}
```</div>