moved to migration strategy, moved daos to top lib

test/drift/sendtrain/generated/schema.dart

@@ -0,0 +1,23 @@
+// dart format width=80
+// GENERATED CODE, DO NOT EDIT BY HAND.
+// ignore_for_file: type=lint
+import 'package:drift/drift.dart';
+import 'package:drift/internal/migrations.dart';
+import 'schema_v1.dart' as v1;
+import 'schema_v2.dart' as v2;
+
+class GeneratedHelper implements SchemaInstantiationHelper {
+  @override
+  GeneratedDatabase databaseForVersion(QueryExecutor db, int version) {
+    switch (version) {
+      case 1:
+        return v1.DatabaseAtV1(db);
+      case 2:
+        return v2.DatabaseAtV2(db);
+      default:
+        throw MissingSchemaException(version, versions);
+    }
+  }
+
+  static const versions = const [1, 2];
+}

test/drift/sendtrain/migration_test.dart

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+// dart format width=80
+// ignore_for_file: unused_local_variable, unused_import
+import 'package:drift/drift.dart';
+import 'package:drift_dev/api/migrations_native.dart';
+import 'package:sendtrain/database/database.dart';
+import 'package:test/test.dart';
+import 'generated/schema.dart';
+
+import 'generated/schema_v1.dart' as v1;
+import 'generated/schema_v2.dart' as v2;
+
+void main() {
+  driftRuntimeOptions.dontWarnAboutMultipleDatabases = true;
+  late SchemaVerifier verifier;
+
+  setUpAll(() {
+    verifier = SchemaVerifier(GeneratedHelper());
+  });
+
+  group('simple database migrations', () {
+    // These simple tests verify all possible schema updates with a simple (no
+    // data) migration. This is a quick way to ensure that written database
+    // migrations properly alter the schema.
+    final versions = GeneratedHelper.versions;
+    for (final (i, fromVersion) in versions.indexed) {
+      group('from $fromVersion', () {
+        for (final toVersion in versions.skip(i + 1)) {
+          test('to $toVersion', () async {
+            final schema = await verifier.schemaAt(fromVersion);
+            final db = AppDatabase(schema.newConnection());
+            await verifier.migrateAndValidate(db, toVersion);
+            await db.close();
+          });
+        }
+      });
+    }
+  });
+
+  // The following template shows how to write tests ensuring your migrations
+  // preserve existing data.
+  // Testing this can be useful for migrations that change existing columns
+  // (e.g. by alterating their type or constraints). Migrations that only add
+  // tables or columns typically don't need these advanced tests. For more
+  // information, see https://drift.simonbinder.eu/migrations/tests/#verifying-data-integrity
+  // TODO: This generated template shows how these tests could be written. Adopt
+  // it to your own needs when testing migrations with data integrity.
+  test("migration from v1 to v2 does not corrupt data", () async {
+    // Add data to insert into the old database, and the expected rows after the
+    // migration.
+    // TODO: Fill these lists
+    final oldSessionsData = <v1.SessionsData>[];
+    final expectedNewSessionsData = <v2.SessionsData>[];
+
+    final oldActivitiesData = <v1.ActivitiesData>[];
+    final expectedNewActivitiesData = <v2.ActivitiesData>[];
+
+    final oldSessionActivitiesData = <v1.SessionActivitiesData>[];
+    final expectedNewSessionActivitiesData = <v2.SessionActivitiesData>[];
+
+    final oldActionsData = <v1.ActionsData>[];
+    final expectedNewActionsData = <v2.ActionsData>[];
+
+    final oldActivityActionsData = <v1.ActivityActionsData>[];
+    final expectedNewActivityActionsData = <v2.ActivityActionsData>[];
+
+    final oldMediaItemsData = <v1.MediaItemsData>[];
+    final expectedNewMediaItemsData = <v2.MediaItemsData>[];
+
+    final oldObjectMediaItemsData = <v1.ObjectMediaItemsData>[];
+    final expectedNewObjectMediaItemsData = <v2.ObjectMediaItemsData>[];
+
+    await verifier.testWithDataIntegrity(
+      oldVersion: 1,
+      newVersion: 2,
+      createOld: v1.DatabaseAtV1.new,
+      createNew: v2.DatabaseAtV2.new,
+      openTestedDatabase: AppDatabase.new,
+      createItems: (batch, oldDb) {
+        batch.insertAll(oldDb.sessions, oldSessionsData);
+        batch.insertAll(oldDb.activities, oldActivitiesData);
+        batch.insertAll(oldDb.sessionActivities, oldSessionActivitiesData);
+        batch.insertAll(oldDb.actions, oldActionsData);
+        batch.insertAll(oldDb.activityActions, oldActivityActionsData);
+        batch.insertAll(oldDb.mediaItems, oldMediaItemsData);
+        batch.insertAll(oldDb.objectMediaItems, oldObjectMediaItemsData);
+      },
+      validateItems: (newDb) async {
+        expect(
+            expectedNewSessionsData, await newDb.select(newDb.sessions).get());
+        expect(expectedNewActivitiesData,
+            await newDb.select(newDb.activities).get());
+        expect(expectedNewSessionActivitiesData,
+            await newDb.select(newDb.sessionActivities).get());
+        expect(expectedNewActionsData, await newDb.select(newDb.actions).get());
+        expect(expectedNewActivityActionsData,
+            await newDb.select(newDb.activityActions).get());
+        expect(expectedNewMediaItemsData,
+            await newDb.select(newDb.mediaItems).get());
+        expect(expectedNewObjectMediaItemsData,
+            await newDb.select(newDb.objectMediaItems).get());
+      },
+    );
+  });
+}