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Migrate data from legacy app #1588

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Merged
gnprice merged 4 commits into from
Jun 16, 2025
Merged

Migrate data from legacy app #1588

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76e64be
db: Debug-log a bit more on schema migrations
gnprice Jun 14, 2025
9bcb2a5
legacy-data: Describe LegacyAppData type and deserializers
gnprice Jun 13, 2025
e140bbb
legacy-data: Describe where legacy data is stored and how encoded
gnprice Jun 13, 2025
6dc5a80
legacy-data: Use legacy data to initialize this app's data
gnprice Jun 13, 2025
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6 changes: 5 additions & 1 deletion lib/model/database.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ import 'package:drift/remote.dart';
import 'package:sqlite3/common.dart';

import '../log.dart';
import 'legacy_app_data.dart';
import 'schema_versions.g.dart';
import 'settings.dart';

Expand Down Expand Up @@ -191,9 +192,11 @@ class AppDatabase extends _$AppDatabase {
);

Future<void> _createLatestSchema(Migrator m) async {
assert(debugLog('Creating DB schema from scratch.'));
await m.createAll();
// Corresponds to `from4to5` above.
await into(globalSettings).insert(GlobalSettingsCompanion());
await migrateLegacyAppData(this);
}

@override
Expand All @@ -205,7 +208,7 @@ class AppDatabase extends _$AppDatabase {
// This should only ever happen in dev. As a dev convenience,
// drop everything from the database and start over.
// TODO(log): log schema downgrade as an error
assert(debugLog('Downgrading schema from v$from to v$to.'));
assert(debugLog('Downgrading DB schema from v$from to v$to.'));

// In the actual app, the target schema version is always
// the latest version as of the code that's being run.
Expand All @@ -219,6 +222,7 @@ class AppDatabase extends _$AppDatabase {
}
assert(1 <= from && from <= to && to <= latestSchemaVersion);

assert(debugLog('Upgrading DB schema from v$from to v$to.'));
await m.runMigrationSteps(from: from, to: to, steps: _migrationSteps);
});
}
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