mirror of https://github.com/AMT-Cheif/drift.git
84 lines
2.7 KiB
Dart
84 lines
2.7 KiB
Dart
import 'package:drift/drift.dart';
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import 'package:drift_dev/api/migrations.dart';
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import 'tables.dart';
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import 'src/generated/schema_v2.dart' as v2;
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import 'src/generated/schema_v4.dart' as v4;
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import 'src/generated/schema_v8.dart' as v8;
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part 'database.g.dart';
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@DriftDatabase(include: {'tables.drift'})
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class Database extends _$Database {
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static const latestSchemaVersion = 9;
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@override
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int get schemaVersion => latestSchemaVersion;
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Database(DatabaseConnection connection) : super(connection);
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@override
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MigrationStrategy get migration {
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return MigrationStrategy(
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onUpgrade: (m, before, now) async {
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for (var target = before + 1; target <= now; target++) {
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switch (target) {
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case 2:
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// Migration from 1 to 2: Add name column in users. Use "no name"
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// as a default value.
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final usersAtV2 = v2.Users(this);
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await m.alterTable(
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TableMigration(
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usersAtV2,
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columnTransformer: {
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users.name: const Constant<String>('no name'),
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},
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newColumns: [usersAtV2.name],
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),
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);
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break;
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case 3:
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// Migration from 2 to 3: We added the groups table
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await m.createTable(groups);
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break;
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case 4:
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// Migration from 3 to 4: users.name now has a default value
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// No need to transform any data, just re-create the table
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final usersAtV4 = v4.Users(this);
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await m.alterTable(TableMigration(usersAtV4));
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break;
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case 5:
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// Just add a new column that was added in version 5;
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await m.addColumn(users, users.nextUser);
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// And create the view on users
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await m.createView(groupCount);
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break;
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case 6:
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await m.addColumn(users, users.birthday);
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break;
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case 7:
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await m.createTable(notes);
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break;
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case 8:
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// Added a unique key to the users table
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await m.alterTable(TableMigration(v8.Users(this)));
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break;
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case 9:
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// Added a check to the users table
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await m.alterTable(TableMigration(users));
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break;
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}
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}
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},
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beforeOpen: (details) async {
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// For Flutter apps, this should be wrapped in an if (kDebugMode) as
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// suggested here: https://drift.simonbinder.eu/docs/advanced-features/migrations/#verifying-a-database-schema-at-runtime
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await validateDatabaseSchema();
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},
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);
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}
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}
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