Fix migration code for virtual tables (#1988)

drift_dev/lib/src/services/schema/schema_files.dart

@@ -270,6 +270,11 @@ class SchemaReader {
     final sqlName = content['name'] as String;
     final isVirtual = content['is_virtual'] as bool;
     final withoutRowId = content['without_rowid'] as bool?;
+    final pascalCase = ReCase(sqlName).pascalCase;
+    final columns = [
+      for (final rawColumn in content['columns'] as List)
+        _readColumn(rawColumn as Map<String, dynamic>)
+    ];
 
     if (isVirtual) {
       final create = content['create_virtual_stmt'] as String;
@@ -278,19 +283,15 @@ class SchemaReader {
 
       return DriftTable(
         sqlName: sqlName,
-        dartTypeName: sqlName,
+        dartTypeName: '${pascalCase}Data',
-        overriddenName: sqlName,
+        overriddenName: pascalCase,
         declaration: CustomVirtualTableDeclaration(parsed),
         overrideWithoutRowId: withoutRowId,
         overrideDontWriteConstraints: true,
+        columns: columns,
       );
     }
 
-    final columns = [
-      for (final rawColumn in content['columns'] as List)
-        _readColumn(rawColumn as Map<String, dynamic>)
-    ];
-
     List<String>? tableConstraints;
     if (content.containsKey('constraints')) {
       tableConstraints = (content['constraints'] as List<dynamic>).cast();
@@ -304,8 +305,6 @@ class SchemaReader {
       };
     }
 
-    final pascalCase = ReCase(sqlName).pascalCase;
-
     return DriftTable(
       sqlName: sqlName,
       overriddenName: pascalCase,

examples/migrations_example/build.yaml

@@ -5,3 +5,7 @@ targets:
         options:
           generate_connect_constructor: true
           store_date_time_values_as_text: true
+          sql:
+            dialect: sqlite
+            options:
+              modules: [fts5]

examples/migrations_example/drift_migrations/drift_schema_v7.json

@@ -0,0 +1 @@
+{"_meta":{"description":"This file contains a serialized version of schema entities for drift.","version":"1.0.0"},"options":{"store_date_time_values_as_text":true},"entities":[{"id":0,"references":[],"type":"table","data":{"name":"users","was_declared_in_moor":false,"columns":[{"name":"id","getter_name":"id","moor_type":"ColumnType.integer","nullable":false,"customConstraints":null,"defaultConstraints":"PRIMARY KEY AUTOINCREMENT","default_dart":null,"default_client_dart":null,"dsl_features":["auto-increment","primary-key"]},{"name":"name","getter_name":"name","moor_type":"ColumnType.text","nullable":false,"customConstraints":null,"default_dart":"const Constant('name')","default_client_dart":null,"dsl_features":[]},{"name":"birthday","getter_name":"birthday","moor_type":"ColumnType.datetime","nullable":true,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[]},{"name":"next_user","getter_name":"nextUser","moor_type":"ColumnType.integer","nullable":true,"customConstraints":null,"defaultConstraints":"REFERENCES users (id)","default_dart":null,"default_client_dart":null,"dsl_features":["unknown"]}],"is_virtual":false}},{"id":1,"references":[0],"type":"table","data":{"name":"groups","was_declared_in_moor":true,"columns":[{"name":"id","getter_name":"id","moor_type":"ColumnType.integer","nullable":false,"customConstraints":"NOT NULL","default_dart":null,"default_client_dart":null,"dsl_features":[]},{"name":"title","getter_name":"title","moor_type":"ColumnType.text","nullable":false,"customConstraints":"NOT NULL","default_dart":null,"default_client_dart":null,"dsl_features":[]},{"name":"deleted","getter_name":"deleted","moor_type":"ColumnType.boolean","nullable":true,"customConstraints":"DEFAULT FALSE","default_dart":"const CustomExpression<bool>('FALSE')","default_client_dart":null,"dsl_features":[]},{"name":"owner","getter_name":"owner","moor_type":"ColumnType.integer","nullable":false,"customConstraints":"NOT NULL REFERENCES users (id)","default_dart":null,"default_client_dart":null,"dsl_features":[]}],"is_virtual":false,"constraints":["PRIMARY KEY (id)"],"explicit_pk":["id"]}},{"id":2,"references":[1,0],"type":"view","data":{"name":"group_count","sql":"CREATE VIEW group_count AS SELECT users.*, (SELECT COUNT(*) FROM \"groups\" WHERE owner = users.id) AS group_count FROM users","dart_data_name":"GroupCountData","dart_info_name":"GroupCount","columns":[{"name":"id","getter_name":"id","moor_type":"ColumnType.integer","nullable":false,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[]},{"name":"name","getter_name":"name","moor_type":"ColumnType.text","nullable":false,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[]},{"name":"birthday","getter_name":"birthday","moor_type":"ColumnType.datetime","nullable":true,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[]},{"name":"next_user","getter_name":"nextUser","moor_type":"ColumnType.integer","nullable":true,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[]},{"name":"group_count","getter_name":"groupCount","moor_type":"ColumnType.integer","nullable":false,"customConstraints":null,"default_dart":null,"default_client_dart":null,"dsl_features":[]}]}},{"id":3,"references":[],"type":"table","data":{"name":"notes","was_declared_in_moor":true,"columns":[{"name":"title","getter_name":"title","moor_type":"ColumnType.text","nullable":false,"customConstraints":"","default_dart":null,"default_client_dart":null,"dsl_features":[]},{"name":"content","getter_name":"content","moor_type":"ColumnType.text","nullable":false,"customConstraints":"","default_dart":null,"default_client_dart":null,"dsl_features":[]},{"name":"search_terms","getter_name":"searchTerms","moor_type":"ColumnType.text","nullable":false,"customConstraints":"","default_dart":null,"default_client_dart":null,"dsl_features":[]}],"is_virtual":true,"create_virtual_stmt":"CREATE VIRTUAL TABLE notes USING fts5(\n    title,\n    content,\n    search_terms,\n    tokenize = \"unicode61 tokenchars '.'\"\n);"}}]}

examples/migrations_example/lib/database.dart

@@ -9,7 +9,7 @@ part 'database.g.dart';
 @DriftDatabase(include: {'tables.drift'})
 class Database extends _$Database {
   @override
-  int get schemaVersion => 6;
+  int get schemaVersion => 7;
 
   Database(DatabaseConnection connection) : super.connect(connection);
 
@@ -18,37 +18,46 @@ class Database extends _$Database {
     return MigrationStrategy(
       onUpgrade: (m, before, now) async {
         for (var target = before + 1; target <= now; target++) {
-          if (target == 2) {
+          switch (target) {
-            // Migration from 1 to 2: Add name column in users. Use "no name"
+            case 2:
-            // as a default value.
+              // Migration from 1 to 2: Add name column in users. Use "no name"
-            final usersAtV2 = v2.Users(this);
+              // as a default value.
+              final usersAtV2 = v2.Users(this);
 
-            await m.alterTable(
+              await m.alterTable(
-              TableMigration(
+                TableMigration(
-                usersAtV2,
+                  usersAtV2,
-                columnTransformer: {
+                  columnTransformer: {
-                  users.name: const Constant<String>('no name'),
+                    users.name: const Constant<String>('no name'),
-                },
+                  },
-                newColumns: [usersAtV2.name],
+                  newColumns: [usersAtV2.name],
-              ),
+                ),
-            );
+              );
-          } else if (target == 3) {
+              break;
-            // Migration from 2 to 3: We added the groups table
+            case 3:
-            await m.createTable(groups);
+              // Migration from 2 to 3: We added the groups table
-          } else if (target == 4) {
+              await m.createTable(groups);
-            // Migration from 3 to 4: users.name now has a default value
+              break;
-            // No need to transform any data, just re-create the table
+            case 4:
-            final usersAtV4 = v4.Users(this);
+              // Migration from 3 to 4: users.name now has a default value
+              // No need to transform any data, just re-create the table
+              final usersAtV4 = v4.Users(this);
 
-            await m.alterTable(TableMigration(usersAtV4));
+              await m.alterTable(TableMigration(usersAtV4));
-          } else if (target == 5) {
+              break;
-            // Just add a new column that was added in version 5;
+            case 5:
-            await m.addColumn(users, users.nextUser);
+              // Just add a new column that was added in version 5;
+              await m.addColumn(users, users.nextUser);
 
-            // And create the view on users
+              // And create the view on users
-            await m.createView(groupCount);
+              await m.createView(groupCount);
-          } else if (target == 6) {
+              break;
-            await m.addColumn(users, users.birthday);
+            case 6:
+              await m.addColumn(users, users.birthday);
+              break;
+            case 7:
+              await m.createTable(notes);
+              break;
           }
         }
       },

examples/migrations_example/lib/database.g.dart

@@ -507,6 +507,225 @@ class Groups extends Table with TableInfo<Groups, Group> {
   bool get dontWriteConstraints => true;
 }
 
+class Note extends DataClass implements Insertable<Note> {
+  final String title;
+  final String content;
+  final String searchTerms;
+  const Note(
+      {required this.title, required this.content, required this.searchTerms});
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    map['title'] = Variable<String>(title);
+    map['content'] = Variable<String>(content);
+    map['search_terms'] = Variable<String>(searchTerms);
+    return map;
+  }
+
+  NotesCompanion toCompanion(bool nullToAbsent) {
+    return NotesCompanion(
+      title: Value(title),
+      content: Value(content),
+      searchTerms: Value(searchTerms),
+    );
+  }
+
+  factory Note.fromJson(Map<String, dynamic> json,
+      {ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return Note(
+      title: serializer.fromJson<String>(json['title']),
+      content: serializer.fromJson<String>(json['content']),
+      searchTerms: serializer.fromJson<String>(json['search_terms']),
+    );
+  }
+  @override
+  Map<String, dynamic> toJson({ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return <String, dynamic>{
+      'title': serializer.toJson<String>(title),
+      'content': serializer.toJson<String>(content),
+      'search_terms': serializer.toJson<String>(searchTerms),
+    };
+  }
+
+  Note copyWith({String? title, String? content, String? searchTerms}) => Note(
+        title: title ?? this.title,
+        content: content ?? this.content,
+        searchTerms: searchTerms ?? this.searchTerms,
+      );
+  @override
+  String toString() {
+    return (StringBuffer('Note(')
+          ..write('title: $title, ')
+          ..write('content: $content, ')
+          ..write('searchTerms: $searchTerms')
+          ..write(')'))
+        .toString();
+  }
+
+  @override
+  int get hashCode => Object.hash(title, content, searchTerms);
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      (other is Note &&
+          other.title == this.title &&
+          other.content == this.content &&
+          other.searchTerms == this.searchTerms);
+}
+
+class NotesCompanion extends UpdateCompanion<Note> {
+  final Value<String> title;
+  final Value<String> content;
+  final Value<String> searchTerms;
+  const NotesCompanion({
+    this.title = const Value.absent(),
+    this.content = const Value.absent(),
+    this.searchTerms = const Value.absent(),
+  });
+  NotesCompanion.insert({
+    required String title,
+    required String content,
+    required String searchTerms,
+  })  : title = Value(title),
+        content = Value(content),
+        searchTerms = Value(searchTerms);
+  static Insertable<Note> custom({
+    Expression<String>? title,
+    Expression<String>? content,
+    Expression<String>? searchTerms,
+  }) {
+    return RawValuesInsertable({
+      if (title != null) 'title': title,
+      if (content != null) 'content': content,
+      if (searchTerms != null) 'search_terms': searchTerms,
+    });
+  }
+
+  NotesCompanion copyWith(
+      {Value<String>? title,
+      Value<String>? content,
+      Value<String>? searchTerms}) {
+    return NotesCompanion(
+      title: title ?? this.title,
+      content: content ?? this.content,
+      searchTerms: searchTerms ?? this.searchTerms,
+    );
+  }
+
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    if (title.present) {
+      map['title'] = Variable<String>(title.value);
+    }
+    if (content.present) {
+      map['content'] = Variable<String>(content.value);
+    }
+    if (searchTerms.present) {
+      map['search_terms'] = Variable<String>(searchTerms.value);
+    }
+    return map;
+  }
+
+  @override
+  String toString() {
+    return (StringBuffer('NotesCompanion(')
+          ..write('title: $title, ')
+          ..write('content: $content, ')
+          ..write('searchTerms: $searchTerms')
+          ..write(')'))
+        .toString();
+  }
+}
+
+class Notes extends Table
+    with TableInfo<Notes, Note>, VirtualTableInfo<Notes, Note> {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  Notes(this.attachedDatabase, [this._alias]);
+  final VerificationMeta _titleMeta = const VerificationMeta('title');
+  late final GeneratedColumn<String> title = GeneratedColumn<String>(
+      'title', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: '');
+  final VerificationMeta _contentMeta = const VerificationMeta('content');
+  late final GeneratedColumn<String> content = GeneratedColumn<String>(
+      'content', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: '');
+  final VerificationMeta _searchTermsMeta =
+      const VerificationMeta('searchTerms');
+  late final GeneratedColumn<String> searchTerms = GeneratedColumn<String>(
+      'search_terms', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: '');
+  @override
+  List<GeneratedColumn> get $columns => [title, content, searchTerms];
+  @override
+  String get aliasedName => _alias ?? 'notes';
+  @override
+  String get actualTableName => 'notes';
+  @override
+  VerificationContext validateIntegrity(Insertable<Note> instance,
+      {bool isInserting = false}) {
+    final context = VerificationContext();
+    final data = instance.toColumns(true);
+    if (data.containsKey('title')) {
+      context.handle(
+          _titleMeta, title.isAcceptableOrUnknown(data['title']!, _titleMeta));
+    } else if (isInserting) {
+      context.missing(_titleMeta);
+    }
+    if (data.containsKey('content')) {
+      context.handle(_contentMeta,
+          content.isAcceptableOrUnknown(data['content']!, _contentMeta));
+    } else if (isInserting) {
+      context.missing(_contentMeta);
+    }
+    if (data.containsKey('search_terms')) {
+      context.handle(
+          _searchTermsMeta,
+          searchTerms.isAcceptableOrUnknown(
+              data['search_terms']!, _searchTermsMeta));
+    } else if (isInserting) {
+      context.missing(_searchTermsMeta);
+    }
+    return context;
+  }
+
+  @override
+  Set<GeneratedColumn> get $primaryKey => <GeneratedColumn>{};
+  @override
+  Note map(Map<String, dynamic> data, {String? tablePrefix}) {
+    final effectivePrefix = tablePrefix != null ? '$tablePrefix.' : '';
+    return Note(
+      title: attachedDatabase.options.types
+          .read(DriftSqlType.string, data['${effectivePrefix}title'])!,
+      content: attachedDatabase.options.types
+          .read(DriftSqlType.string, data['${effectivePrefix}content'])!,
+      searchTerms: attachedDatabase.options.types
+          .read(DriftSqlType.string, data['${effectivePrefix}search_terms'])!,
+    );
+  }
+
+  @override
+  Notes createAlias(String alias) {
+    return Notes(attachedDatabase, alias);
+  }
+
+  @override
+  bool get dontWriteConstraints => true;
+  @override
+  String get moduleAndArgs =>
+      'fts5(title, content, search_terms, tokenize = "unicode61 tokenchars \'.\'")';
+}
+
 class GroupCountData extends DataClass {
   final int id;
   final String name;
@@ -646,12 +865,13 @@ abstract class _$Database extends GeneratedDatabase {
   late final $UsersTable users = $UsersTable(this);
   late final Groups groups = Groups(this);
   late final GroupCount groupCount = GroupCount(this);
+  late final Notes notes = Notes(this);
   @override
   Iterable<TableInfo<Table, dynamic>> get allTables =>
       allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities =>
-      [users, groups, groupCount];
+      [users, groups, groupCount, notes];
   @override
   DriftDatabaseOptions get options =>
       const DriftDatabaseOptions(storeDateTimeAsText: true);

examples/migrations_example/lib/src/generated/schema.dart

@@ -4,6 +4,7 @@ import 'package:drift/drift.dart';
 import 'package:drift_dev/api/migrations.dart';
 import 'schema_v6.dart' as v6;
 import 'schema_v2.dart' as v2;
+import 'schema_v7.dart' as v7;
 import 'schema_v3.dart' as v3;
 import 'schema_v4.dart' as v4;
 import 'schema_v1.dart' as v1;
@@ -17,6 +18,8 @@ class GeneratedHelper implements SchemaInstantiationHelper {
         return v6.DatabaseAtV6(db);
       case 2:
         return v2.DatabaseAtV2(db);
+      case 7:
+        return v7.DatabaseAtV7(db);
       case 3:
         return v3.DatabaseAtV3(db);
       case 4:
@@ -26,7 +29,7 @@ class GeneratedHelper implements SchemaInstantiationHelper {
       case 5:
         return v5.DatabaseAtV5(db);
       default:
-        throw MissingSchemaException(version, const {6, 2, 3, 4, 1, 5});
+        throw MissingSchemaException(version, const {6, 2, 7, 3, 4, 1, 5});
     }
   }
 }

examples/migrations_example/lib/src/generated/schema_v1.dart

@@ -39,7 +39,8 @@ class DatabaseAtV1 extends GeneratedDatabase {
   DatabaseAtV1.connect(DatabaseConnection c) : super.connect(c);
   late final Users users = Users(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities => [users];
   @override

examples/migrations_example/lib/src/generated/schema_v2.dart

@@ -42,7 +42,8 @@ class DatabaseAtV2 extends GeneratedDatabase {
   DatabaseAtV2.connect(DatabaseConnection c) : super.connect(c);
   late final Users users = Users(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities => [users];
   @override

examples/migrations_example/lib/src/generated/schema_v3.dart

@@ -93,7 +93,8 @@ class DatabaseAtV3 extends GeneratedDatabase {
   late final Users users = Users(this);
   late final Groups groups = Groups(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities => [users, groups];
   @override

examples/migrations_example/lib/src/generated/schema_v4.dart

@@ -95,7 +95,8 @@ class DatabaseAtV4 extends GeneratedDatabase {
   late final Users users = Users(this);
   late final Groups groups = Groups(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities => [users, groups];
   @override

examples/migrations_example/lib/src/generated/schema_v5.dart

@@ -143,7 +143,8 @@ class DatabaseAtV5 extends GeneratedDatabase {
   late final Groups groups = Groups(this);
   late final GroupCount groupCount = GroupCount(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities =>
       [users, groups, groupCount];

examples/migrations_example/lib/src/generated/schema_v6.dart

@@ -150,7 +150,8 @@ class DatabaseAtV6 extends GeneratedDatabase {
   late final Groups groups = Groups(this);
   late final GroupCount groupCount = GroupCount(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities =>
       [users, groups, groupCount];

examples/migrations_example/lib/src/generated/schema_v7.dart

@@ -0,0 +1,209 @@
+// GENERATED CODE, DO NOT EDIT BY HAND.
+//@dart=2.12
+import 'package:drift/drift.dart';
+
+class Users extends Table with TableInfo {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  Users(this.attachedDatabase, [this._alias]);
+  late final GeneratedColumn<int> id = GeneratedColumn<int>(
+      'id', aliasedName, false,
+      type: DriftSqlType.int,
+      requiredDuringInsert: false,
+      defaultConstraints: 'PRIMARY KEY AUTOINCREMENT');
+  late final GeneratedColumn<String> name = GeneratedColumn<String>(
+      'name', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: false,
+      defaultValue: const Constant('name'));
+  late final GeneratedColumn<DateTime> birthday = GeneratedColumn<DateTime>(
+      'birthday', aliasedName, true,
+      type: DriftSqlType.dateTime, requiredDuringInsert: false);
+  late final GeneratedColumn<int> nextUser = GeneratedColumn<int>(
+      'next_user', aliasedName, true,
+      type: DriftSqlType.int,
+      requiredDuringInsert: false,
+      defaultConstraints: 'REFERENCES users (id)');
+  @override
+  List<GeneratedColumn> get $columns => [id, name, birthday, nextUser];
+  @override
+  String get aliasedName => _alias ?? 'users';
+  @override
+  String get actualTableName => 'users';
+  @override
+  Set<GeneratedColumn> get $primaryKey => {id};
+  @override
+  Never map(Map<String, dynamic> data, {String? tablePrefix}) {
+    throw UnsupportedError('TableInfo.map in schema verification code');
+  }
+
+  @override
+  Users createAlias(String alias) {
+    return Users(attachedDatabase, alias);
+  }
+
+  @override
+  bool get dontWriteConstraints => false;
+}
+
+class Groups extends Table with TableInfo {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  Groups(this.attachedDatabase, [this._alias]);
+  late final GeneratedColumn<int> id = GeneratedColumn<int>(
+      'id', aliasedName, false,
+      type: DriftSqlType.int,
+      requiredDuringInsert: false,
+      $customConstraints: 'NOT NULL');
+  late final GeneratedColumn<String> title = GeneratedColumn<String>(
+      'title', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: 'NOT NULL');
+  late final GeneratedColumn<bool> deleted = GeneratedColumn<bool>(
+      'deleted', aliasedName, true,
+      type: DriftSqlType.bool,
+      requiredDuringInsert: false,
+      $customConstraints: 'DEFAULT FALSE',
+      defaultValue: const CustomExpression<bool>('FALSE'));
+  late final GeneratedColumn<int> owner = GeneratedColumn<int>(
+      'owner', aliasedName, false,
+      type: DriftSqlType.int,
+      requiredDuringInsert: true,
+      $customConstraints: 'NOT NULL REFERENCES users (id)');
+  @override
+  List<GeneratedColumn> get $columns => [id, title, deleted, owner];
+  @override
+  String get aliasedName => _alias ?? 'groups';
+  @override
+  String get actualTableName => 'groups';
+  @override
+  Set<GeneratedColumn> get $primaryKey => {id};
+  @override
+  Never map(Map<String, dynamic> data, {String? tablePrefix}) {
+    throw UnsupportedError('TableInfo.map in schema verification code');
+  }
+
+  @override
+  Groups createAlias(String alias) {
+    return Groups(attachedDatabase, alias);
+  }
+
+  @override
+  List<String> get customConstraints => const ['PRIMARY KEY (id)'];
+  @override
+  bool get dontWriteConstraints => true;
+}
+
+class Notes extends Table with TableInfo, VirtualTableInfo {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  Notes(this.attachedDatabase, [this._alias]);
+  late final GeneratedColumn<String> title = GeneratedColumn<String>(
+      'title', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: '');
+  late final GeneratedColumn<String> content = GeneratedColumn<String>(
+      'content', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: '');
+  late final GeneratedColumn<String> searchTerms = GeneratedColumn<String>(
+      'search_terms', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: '');
+  @override
+  List<GeneratedColumn> get $columns => [title, content, searchTerms];
+  @override
+  String get aliasedName => _alias ?? 'notes';
+  @override
+  String get actualTableName => 'notes';
+  @override
+  Set<GeneratedColumn> get $primaryKey => <GeneratedColumn>{};
+  @override
+  Never map(Map<String, dynamic> data, {String? tablePrefix}) {
+    throw UnsupportedError('TableInfo.map in schema verification code');
+  }
+
+  @override
+  Notes createAlias(String alias) {
+    return Notes(attachedDatabase, alias);
+  }
+
+  @override
+  bool get dontWriteConstraints => true;
+  @override
+  String get moduleAndArgs =>
+      'fts5(title, content, search_terms, tokenize = "unicode61 tokenchars \'.\'")';
+}
+
+class GroupCount extends ViewInfo<GroupCount, Never> implements HasResultSet {
+  final String? _alias;
+  @override
+  final DatabaseAtV7 attachedDatabase;
+  GroupCount(this.attachedDatabase, [this._alias]);
+  @override
+  List<GeneratedColumn> get $columns =>
+      [id, name, birthday, nextUser, groupCount];
+  @override
+  String get aliasedName => _alias ?? entityName;
+  @override
+  String get entityName => 'group_count';
+  @override
+  String? get createViewStmt => null;
+  @override
+  GroupCount get asDslTable => this;
+  @override
+  Never map(Map<String, dynamic> data, {String? tablePrefix}) {
+    throw UnsupportedError('TableInfo.map in schema verification code');
+  }
+
+  late final GeneratedColumn<int> id =
+      GeneratedColumn<int>('id', aliasedName, false, type: DriftSqlType.int);
+  late final GeneratedColumn<String> name = GeneratedColumn<String>(
+      'name', aliasedName, false,
+      type: DriftSqlType.string);
+  late final GeneratedColumn<DateTime> birthday = GeneratedColumn<DateTime>(
+      'birthday', aliasedName, true,
+      type: DriftSqlType.dateTime);
+  late final GeneratedColumn<int> nextUser = GeneratedColumn<int>(
+      'next_user', aliasedName, true,
+      type: DriftSqlType.int);
+  late final GeneratedColumn<int> groupCount = GeneratedColumn<int>(
+      'group_count', aliasedName, false,
+      type: DriftSqlType.int);
+  @override
+  GroupCount createAlias(String alias) {
+    return GroupCount(attachedDatabase, alias);
+  }
+
+  @override
+  Query? get query => null;
+  @override
+  Set<String> get readTables => const {};
+}
+
+class DatabaseAtV7 extends GeneratedDatabase {
+  DatabaseAtV7(QueryExecutor e) : super(e);
+  DatabaseAtV7.connect(DatabaseConnection c) : super.connect(c);
+  late final Users users = Users(this);
+  late final Groups groups = Groups(this);
+  late final GroupCount groupCount = GroupCount(this);
+  late final Notes notes = Notes(this);
+  @override
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
+  @override
+  List<DatabaseSchemaEntity> get allSchemaEntities =>
+      [users, groups, groupCount, notes];
+  @override
+  int get schemaVersion => 7;
+  @override
+  DriftDatabaseOptions get options =>
+      const DriftDatabaseOptions(storeDateTimeAsText: true);
+}

examples/migrations_example/lib/tables.drift

@@ -10,6 +10,14 @@ CREATE TABLE "groups" (
     PRIMARY KEY (id)
 );
 
+-- This table was added in schema version 7
+CREATE VIRTUAL TABLE notes USING fts5(
+    title,
+    content,
+    search_terms,
+    tokenize = "unicode61 tokenchars '.'"
+);
+
 -- This view was added in schema version 5
 CREATE VIEW group_count AS SELECT
     users.*,

examples/migrations_example/test/generated/schema.dart

@@ -4,6 +4,7 @@ import 'package:drift/drift.dart';
 import 'package:drift_dev/api/migrations.dart';
 import 'schema_v6.dart' as v6;
 import 'schema_v2.dart' as v2;
+import 'schema_v7.dart' as v7;
 import 'schema_v3.dart' as v3;
 import 'schema_v4.dart' as v4;
 import 'schema_v1.dart' as v1;
@@ -17,6 +18,8 @@ class GeneratedHelper implements SchemaInstantiationHelper {
         return v6.DatabaseAtV6(db);
       case 2:
         return v2.DatabaseAtV2(db);
+      case 7:
+        return v7.DatabaseAtV7(db);
       case 3:
         return v3.DatabaseAtV3(db);
       case 4:
@@ -26,7 +29,7 @@ class GeneratedHelper implements SchemaInstantiationHelper {
       case 5:
         return v5.DatabaseAtV5(db);
       default:
-        throw MissingSchemaException(version, const {6, 2, 3, 4, 1, 5});
+        throw MissingSchemaException(version, const {6, 2, 7, 3, 4, 1, 5});
     }
   }
 }

examples/migrations_example/test/generated/schema_v1.dart

@@ -132,7 +132,8 @@ class DatabaseAtV1 extends GeneratedDatabase {
   DatabaseAtV1.connect(DatabaseConnection c) : super.connect(c);
   late final Users users = Users(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities => [users];
   @override

examples/migrations_example/test/generated/schema_v2.dart

@@ -155,7 +155,8 @@ class DatabaseAtV2 extends GeneratedDatabase {
   DatabaseAtV2.connect(DatabaseConnection c) : super.connect(c);
   late final Users users = Users(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities => [users];
   @override

examples/migrations_example/test/generated/schema_v3.dart

@@ -204,11 +204,15 @@ class GroupsData extends DataClass implements Insertable<GroupsData> {
     };
   }
 
-  GroupsData copyWith({int? id, String? title, bool? deleted, int? owner}) =>
+  GroupsData copyWith(
+          {int? id,
+          String? title,
+          Value<bool?> deleted = const Value.absent(),
+          int? owner}) =>
       GroupsData(
         id: id ?? this.id,
         title: title ?? this.title,
-        deleted: deleted ?? this.deleted,
+        deleted: deleted.present ? deleted.value : this.deleted,
         owner: owner ?? this.owner,
       );
   @override
@@ -375,7 +379,8 @@ class DatabaseAtV3 extends GeneratedDatabase {
   late final Users users = Users(this);
   late final Groups groups = Groups(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities => [users, groups];
   @override

examples/migrations_example/test/generated/schema_v4.dart

@@ -206,11 +206,15 @@ class GroupsData extends DataClass implements Insertable<GroupsData> {
     };
   }
 
-  GroupsData copyWith({int? id, String? title, bool? deleted, int? owner}) =>
+  GroupsData copyWith(
+          {int? id,
+          String? title,
+          Value<bool?> deleted = const Value.absent(),
+          int? owner}) =>
       GroupsData(
         id: id ?? this.id,
         title: title ?? this.title,
-        deleted: deleted ?? this.deleted,
+        deleted: deleted.present ? deleted.value : this.deleted,
         owner: owner ?? this.owner,
       );
   @override
@@ -377,7 +381,8 @@ class DatabaseAtV4 extends GeneratedDatabase {
   late final Users users = Users(this);
   late final Groups groups = Groups(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities => [users, groups];
   @override

examples/migrations_example/test/generated/schema_v5.dart

@@ -47,10 +47,14 @@ class UsersData extends DataClass implements Insertable<UsersData> {
     };
   }
 
-  UsersData copyWith({int? id, String? name, int? nextUser}) => UsersData(
+  UsersData copyWith(
+          {int? id,
+          String? name,
+          Value<int?> nextUser = const Value.absent()}) =>
+      UsersData(
         id: id ?? this.id,
         name: name ?? this.name,
-        nextUser: nextUser ?? this.nextUser,
+        nextUser: nextUser.present ? nextUser.value : this.nextUser,
       );
   @override
   String toString() {
@@ -238,11 +242,15 @@ class GroupsData extends DataClass implements Insertable<GroupsData> {
     };
   }
 
-  GroupsData copyWith({int? id, String? title, bool? deleted, int? owner}) =>
+  GroupsData copyWith(
+          {int? id,
+          String? title,
+          Value<bool?> deleted = const Value.absent(),
+          int? owner}) =>
       GroupsData(
         id: id ?? this.id,
         title: title ?? this.title,
-        deleted: deleted ?? this.deleted,
+        deleted: deleted.present ? deleted.value : this.deleted,
         owner: owner ?? this.owner,
       );
   @override
@@ -435,11 +443,14 @@ class GroupCountData extends DataClass {
   }
 
   GroupCountData copyWith(
-          {int? id, String? name, int? nextUser, int? groupCount}) =>
+          {int? id,
+          String? name,
+          Value<int?> nextUser = const Value.absent(),
+          int? groupCount}) =>
       GroupCountData(
         id: id ?? this.id,
         name: name ?? this.name,
-        nextUser: nextUser ?? this.nextUser,
+        nextUser: nextUser.present ? nextUser.value : this.nextUser,
         groupCount: groupCount ?? this.groupCount,
       );
   @override
@@ -525,7 +536,8 @@ class DatabaseAtV5 extends GeneratedDatabase {
   late final Groups groups = Groups(this);
   late final GroupCount groupCount = GroupCount(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities =>
       [users, groups, groupCount];

examples/migrations_example/test/generated/schema_v6.dart

@@ -58,12 +58,15 @@ class UsersData extends DataClass implements Insertable<UsersData> {
   }
 
   UsersData copyWith(
-          {int? id, String? name, DateTime? birthday, int? nextUser}) =>
+          {int? id,
+          String? name,
+          Value<DateTime?> birthday = const Value.absent(),
+          Value<int?> nextUser = const Value.absent()}) =>
       UsersData(
         id: id ?? this.id,
         name: name ?? this.name,
-        birthday: birthday ?? this.birthday,
+        birthday: birthday.present ? birthday.value : this.birthday,
-        nextUser: nextUser ?? this.nextUser,
+        nextUser: nextUser.present ? nextUser.value : this.nextUser,
       );
   @override
   String toString() {
@@ -271,11 +274,15 @@ class GroupsData extends DataClass implements Insertable<GroupsData> {
     };
   }
 
-  GroupsData copyWith({int? id, String? title, bool? deleted, int? owner}) =>
+  GroupsData copyWith(
+          {int? id,
+          String? title,
+          Value<bool?> deleted = const Value.absent(),
+          int? owner}) =>
       GroupsData(
         id: id ?? this.id,
         title: title ?? this.title,
-        deleted: deleted ?? this.deleted,
+        deleted: deleted.present ? deleted.value : this.deleted,
         owner: owner ?? this.owner,
       );
   @override
@@ -474,14 +481,14 @@ class GroupCountData extends DataClass {
   GroupCountData copyWith(
           {int? id,
           String? name,
-          DateTime? birthday,
+          Value<DateTime?> birthday = const Value.absent(),
-          int? nextUser,
+          Value<int?> nextUser = const Value.absent(),
           int? groupCount}) =>
       GroupCountData(
         id: id ?? this.id,
         name: name ?? this.name,
-        birthday: birthday ?? this.birthday,
+        birthday: birthday.present ? birthday.value : this.birthday,
-        nextUser: nextUser ?? this.nextUser,
+        nextUser: nextUser.present ? nextUser.value : this.nextUser,
         groupCount: groupCount ?? this.groupCount,
       );
   @override
@@ -575,7 +582,8 @@ class DatabaseAtV6 extends GeneratedDatabase {
   late final Groups groups = Groups(this);
   late final GroupCount groupCount = GroupCount(this);
   @override
-  Iterable<TableInfo> get allTables => allSchemaEntities.whereType<TableInfo>();
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
   List<DatabaseSchemaEntity> get allSchemaEntities =>
       [users, groups, groupCount];

examples/migrations_example/test/generated/schema_v7.dart

@@ -0,0 +1,784 @@
+// GENERATED CODE, DO NOT EDIT BY HAND.
+//@dart=2.12
+import 'package:drift/drift.dart';
+
+class UsersData extends DataClass implements Insertable<UsersData> {
+  final int id;
+  final String name;
+  final DateTime? birthday;
+  final int? nextUser;
+  const UsersData(
+      {required this.id, required this.name, this.birthday, this.nextUser});
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    map['id'] = Variable<int>(id);
+    map['name'] = Variable<String>(name);
+    if (!nullToAbsent || birthday != null) {
+      map['birthday'] = Variable<DateTime>(birthday);
+    }
+    if (!nullToAbsent || nextUser != null) {
+      map['next_user'] = Variable<int>(nextUser);
+    }
+    return map;
+  }
+
+  UsersCompanion toCompanion(bool nullToAbsent) {
+    return UsersCompanion(
+      id: Value(id),
+      name: Value(name),
+      birthday: birthday == null && nullToAbsent
+          ? const Value.absent()
+          : Value(birthday),
+      nextUser: nextUser == null && nullToAbsent
+          ? const Value.absent()
+          : Value(nextUser),
+    );
+  }
+
+  factory UsersData.fromJson(Map<String, dynamic> json,
+      {ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return UsersData(
+      id: serializer.fromJson<int>(json['id']),
+      name: serializer.fromJson<String>(json['name']),
+      birthday: serializer.fromJson<DateTime?>(json['birthday']),
+      nextUser: serializer.fromJson<int?>(json['nextUser']),
+    );
+  }
+  @override
+  Map<String, dynamic> toJson({ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return <String, dynamic>{
+      'id': serializer.toJson<int>(id),
+      'name': serializer.toJson<String>(name),
+      'birthday': serializer.toJson<DateTime?>(birthday),
+      'nextUser': serializer.toJson<int?>(nextUser),
+    };
+  }
+
+  UsersData copyWith(
+          {int? id,
+          String? name,
+          Value<DateTime?> birthday = const Value.absent(),
+          Value<int?> nextUser = const Value.absent()}) =>
+      UsersData(
+        id: id ?? this.id,
+        name: name ?? this.name,
+        birthday: birthday.present ? birthday.value : this.birthday,
+        nextUser: nextUser.present ? nextUser.value : this.nextUser,
+      );
+  @override
+  String toString() {
+    return (StringBuffer('UsersData(')
+          ..write('id: $id, ')
+          ..write('name: $name, ')
+          ..write('birthday: $birthday, ')
+          ..write('nextUser: $nextUser')
+          ..write(')'))
+        .toString();
+  }
+
+  @override
+  int get hashCode => Object.hash(id, name, birthday, nextUser);
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      (other is UsersData &&
+          other.id == this.id &&
+          other.name == this.name &&
+          other.birthday == this.birthday &&
+          other.nextUser == this.nextUser);
+}
+
+class UsersCompanion extends UpdateCompanion<UsersData> {
+  final Value<int> id;
+  final Value<String> name;
+  final Value<DateTime?> birthday;
+  final Value<int?> nextUser;
+  const UsersCompanion({
+    this.id = const Value.absent(),
+    this.name = const Value.absent(),
+    this.birthday = const Value.absent(),
+    this.nextUser = const Value.absent(),
+  });
+  UsersCompanion.insert({
+    this.id = const Value.absent(),
+    this.name = const Value.absent(),
+    this.birthday = const Value.absent(),
+    this.nextUser = const Value.absent(),
+  });
+  static Insertable<UsersData> custom({
+    Expression<int>? id,
+    Expression<String>? name,
+    Expression<DateTime>? birthday,
+    Expression<int>? nextUser,
+  }) {
+    return RawValuesInsertable({
+      if (id != null) 'id': id,
+      if (name != null) 'name': name,
+      if (birthday != null) 'birthday': birthday,
+      if (nextUser != null) 'next_user': nextUser,
+    });
+  }
+
+  UsersCompanion copyWith(
+      {Value<int>? id,
+      Value<String>? name,
+      Value<DateTime?>? birthday,
+      Value<int?>? nextUser}) {
+    return UsersCompanion(
+      id: id ?? this.id,
+      name: name ?? this.name,
+      birthday: birthday ?? this.birthday,
+      nextUser: nextUser ?? this.nextUser,
+    );
+  }
+
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    if (id.present) {
+      map['id'] = Variable<int>(id.value);
+    }
+    if (name.present) {
+      map['name'] = Variable<String>(name.value);
+    }
+    if (birthday.present) {
+      map['birthday'] = Variable<DateTime>(birthday.value);
+    }
+    if (nextUser.present) {
+      map['next_user'] = Variable<int>(nextUser.value);
+    }
+    return map;
+  }
+
+  @override
+  String toString() {
+    return (StringBuffer('UsersCompanion(')
+          ..write('id: $id, ')
+          ..write('name: $name, ')
+          ..write('birthday: $birthday, ')
+          ..write('nextUser: $nextUser')
+          ..write(')'))
+        .toString();
+  }
+}
+
+class Users extends Table with TableInfo<Users, UsersData> {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  Users(this.attachedDatabase, [this._alias]);
+  late final GeneratedColumn<int> id = GeneratedColumn<int>(
+      'id', aliasedName, false,
+      type: DriftSqlType.int,
+      requiredDuringInsert: false,
+      defaultConstraints: 'PRIMARY KEY AUTOINCREMENT');
+  late final GeneratedColumn<String> name = GeneratedColumn<String>(
+      'name', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: false,
+      defaultValue: const Constant('name'));
+  late final GeneratedColumn<DateTime> birthday = GeneratedColumn<DateTime>(
+      'birthday', aliasedName, true,
+      type: DriftSqlType.dateTime, requiredDuringInsert: false);
+  late final GeneratedColumn<int> nextUser = GeneratedColumn<int>(
+      'next_user', aliasedName, true,
+      type: DriftSqlType.int,
+      requiredDuringInsert: false,
+      defaultConstraints: 'REFERENCES users (id)');
+  @override
+  List<GeneratedColumn> get $columns => [id, name, birthday, nextUser];
+  @override
+  String get aliasedName => _alias ?? 'users';
+  @override
+  String get actualTableName => 'users';
+  @override
+  Set<GeneratedColumn> get $primaryKey => {id};
+  @override
+  UsersData map(Map<String, dynamic> data, {String? tablePrefix}) {
+    final effectivePrefix = tablePrefix != null ? '$tablePrefix.' : '';
+    return UsersData(
+      id: attachedDatabase.options.types
+          .read(DriftSqlType.int, data['${effectivePrefix}id'])!,
+      name: attachedDatabase.options.types
+          .read(DriftSqlType.string, data['${effectivePrefix}name'])!,
+      birthday: attachedDatabase.options.types
+          .read(DriftSqlType.dateTime, data['${effectivePrefix}birthday']),
+      nextUser: attachedDatabase.options.types
+          .read(DriftSqlType.int, data['${effectivePrefix}next_user']),
+    );
+  }
+
+  @override
+  Users createAlias(String alias) {
+    return Users(attachedDatabase, alias);
+  }
+
+  @override
+  bool get dontWriteConstraints => false;
+}
+
+class GroupsData extends DataClass implements Insertable<GroupsData> {
+  final int id;
+  final String title;
+  final bool? deleted;
+  final int owner;
+  const GroupsData(
+      {required this.id,
+      required this.title,
+      this.deleted,
+      required this.owner});
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    map['id'] = Variable<int>(id);
+    map['title'] = Variable<String>(title);
+    if (!nullToAbsent || deleted != null) {
+      map['deleted'] = Variable<bool>(deleted);
+    }
+    map['owner'] = Variable<int>(owner);
+    return map;
+  }
+
+  GroupsCompanion toCompanion(bool nullToAbsent) {
+    return GroupsCompanion(
+      id: Value(id),
+      title: Value(title),
+      deleted: deleted == null && nullToAbsent
+          ? const Value.absent()
+          : Value(deleted),
+      owner: Value(owner),
+    );
+  }
+
+  factory GroupsData.fromJson(Map<String, dynamic> json,
+      {ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return GroupsData(
+      id: serializer.fromJson<int>(json['id']),
+      title: serializer.fromJson<String>(json['title']),
+      deleted: serializer.fromJson<bool?>(json['deleted']),
+      owner: serializer.fromJson<int>(json['owner']),
+    );
+  }
+  @override
+  Map<String, dynamic> toJson({ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return <String, dynamic>{
+      'id': serializer.toJson<int>(id),
+      'title': serializer.toJson<String>(title),
+      'deleted': serializer.toJson<bool?>(deleted),
+      'owner': serializer.toJson<int>(owner),
+    };
+  }
+
+  GroupsData copyWith(
+          {int? id,
+          String? title,
+          Value<bool?> deleted = const Value.absent(),
+          int? owner}) =>
+      GroupsData(
+        id: id ?? this.id,
+        title: title ?? this.title,
+        deleted: deleted.present ? deleted.value : this.deleted,
+        owner: owner ?? this.owner,
+      );
+  @override
+  String toString() {
+    return (StringBuffer('GroupsData(')
+          ..write('id: $id, ')
+          ..write('title: $title, ')
+          ..write('deleted: $deleted, ')
+          ..write('owner: $owner')
+          ..write(')'))
+        .toString();
+  }
+
+  @override
+  int get hashCode => Object.hash(id, title, deleted, owner);
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      (other is GroupsData &&
+          other.id == this.id &&
+          other.title == this.title &&
+          other.deleted == this.deleted &&
+          other.owner == this.owner);
+}
+
+class GroupsCompanion extends UpdateCompanion<GroupsData> {
+  final Value<int> id;
+  final Value<String> title;
+  final Value<bool?> deleted;
+  final Value<int> owner;
+  const GroupsCompanion({
+    this.id = const Value.absent(),
+    this.title = const Value.absent(),
+    this.deleted = const Value.absent(),
+    this.owner = const Value.absent(),
+  });
+  GroupsCompanion.insert({
+    this.id = const Value.absent(),
+    required String title,
+    this.deleted = const Value.absent(),
+    required int owner,
+  })  : title = Value(title),
+        owner = Value(owner);
+  static Insertable<GroupsData> custom({
+    Expression<int>? id,
+    Expression<String>? title,
+    Expression<bool>? deleted,
+    Expression<int>? owner,
+  }) {
+    return RawValuesInsertable({
+      if (id != null) 'id': id,
+      if (title != null) 'title': title,
+      if (deleted != null) 'deleted': deleted,
+      if (owner != null) 'owner': owner,
+    });
+  }
+
+  GroupsCompanion copyWith(
+      {Value<int>? id,
+      Value<String>? title,
+      Value<bool?>? deleted,
+      Value<int>? owner}) {
+    return GroupsCompanion(
+      id: id ?? this.id,
+      title: title ?? this.title,
+      deleted: deleted ?? this.deleted,
+      owner: owner ?? this.owner,
+    );
+  }
+
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    if (id.present) {
+      map['id'] = Variable<int>(id.value);
+    }
+    if (title.present) {
+      map['title'] = Variable<String>(title.value);
+    }
+    if (deleted.present) {
+      map['deleted'] = Variable<bool>(deleted.value);
+    }
+    if (owner.present) {
+      map['owner'] = Variable<int>(owner.value);
+    }
+    return map;
+  }
+
+  @override
+  String toString() {
+    return (StringBuffer('GroupsCompanion(')
+          ..write('id: $id, ')
+          ..write('title: $title, ')
+          ..write('deleted: $deleted, ')
+          ..write('owner: $owner')
+          ..write(')'))
+        .toString();
+  }
+}
+
+class Groups extends Table with TableInfo<Groups, GroupsData> {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  Groups(this.attachedDatabase, [this._alias]);
+  late final GeneratedColumn<int> id = GeneratedColumn<int>(
+      'id', aliasedName, false,
+      type: DriftSqlType.int,
+      requiredDuringInsert: false,
+      $customConstraints: 'NOT NULL');
+  late final GeneratedColumn<String> title = GeneratedColumn<String>(
+      'title', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: 'NOT NULL');
+  late final GeneratedColumn<bool> deleted = GeneratedColumn<bool>(
+      'deleted', aliasedName, true,
+      type: DriftSqlType.bool,
+      requiredDuringInsert: false,
+      $customConstraints: 'DEFAULT FALSE',
+      defaultValue: const CustomExpression<bool>('FALSE'));
+  late final GeneratedColumn<int> owner = GeneratedColumn<int>(
+      'owner', aliasedName, false,
+      type: DriftSqlType.int,
+      requiredDuringInsert: true,
+      $customConstraints: 'NOT NULL REFERENCES users (id)');
+  @override
+  List<GeneratedColumn> get $columns => [id, title, deleted, owner];
+  @override
+  String get aliasedName => _alias ?? 'groups';
+  @override
+  String get actualTableName => 'groups';
+  @override
+  Set<GeneratedColumn> get $primaryKey => {id};
+  @override
+  GroupsData map(Map<String, dynamic> data, {String? tablePrefix}) {
+    final effectivePrefix = tablePrefix != null ? '$tablePrefix.' : '';
+    return GroupsData(
+      id: attachedDatabase.options.types
+          .read(DriftSqlType.int, data['${effectivePrefix}id'])!,
+      title: attachedDatabase.options.types
+          .read(DriftSqlType.string, data['${effectivePrefix}title'])!,
+      deleted: attachedDatabase.options.types
+          .read(DriftSqlType.bool, data['${effectivePrefix}deleted']),
+      owner: attachedDatabase.options.types
+          .read(DriftSqlType.int, data['${effectivePrefix}owner'])!,
+    );
+  }
+
+  @override
+  Groups createAlias(String alias) {
+    return Groups(attachedDatabase, alias);
+  }
+
+  @override
+  List<String> get customConstraints => const ['PRIMARY KEY (id)'];
+  @override
+  bool get dontWriteConstraints => true;
+}
+
+class NotesData extends DataClass implements Insertable<NotesData> {
+  final String title;
+  final String content;
+  final String searchTerms;
+  const NotesData(
+      {required this.title, required this.content, required this.searchTerms});
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    map['title'] = Variable<String>(title);
+    map['content'] = Variable<String>(content);
+    map['search_terms'] = Variable<String>(searchTerms);
+    return map;
+  }
+
+  NotesCompanion toCompanion(bool nullToAbsent) {
+    return NotesCompanion(
+      title: Value(title),
+      content: Value(content),
+      searchTerms: Value(searchTerms),
+    );
+  }
+
+  factory NotesData.fromJson(Map<String, dynamic> json,
+      {ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return NotesData(
+      title: serializer.fromJson<String>(json['title']),
+      content: serializer.fromJson<String>(json['content']),
+      searchTerms: serializer.fromJson<String>(json['searchTerms']),
+    );
+  }
+  @override
+  Map<String, dynamic> toJson({ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return <String, dynamic>{
+      'title': serializer.toJson<String>(title),
+      'content': serializer.toJson<String>(content),
+      'searchTerms': serializer.toJson<String>(searchTerms),
+    };
+  }
+
+  NotesData copyWith({String? title, String? content, String? searchTerms}) =>
+      NotesData(
+        title: title ?? this.title,
+        content: content ?? this.content,
+        searchTerms: searchTerms ?? this.searchTerms,
+      );
+  @override
+  String toString() {
+    return (StringBuffer('NotesData(')
+          ..write('title: $title, ')
+          ..write('content: $content, ')
+          ..write('searchTerms: $searchTerms')
+          ..write(')'))
+        .toString();
+  }
+
+  @override
+  int get hashCode => Object.hash(title, content, searchTerms);
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      (other is NotesData &&
+          other.title == this.title &&
+          other.content == this.content &&
+          other.searchTerms == this.searchTerms);
+}
+
+class NotesCompanion extends UpdateCompanion<NotesData> {
+  final Value<String> title;
+  final Value<String> content;
+  final Value<String> searchTerms;
+  const NotesCompanion({
+    this.title = const Value.absent(),
+    this.content = const Value.absent(),
+    this.searchTerms = const Value.absent(),
+  });
+  NotesCompanion.insert({
+    required String title,
+    required String content,
+    required String searchTerms,
+  })  : title = Value(title),
+        content = Value(content),
+        searchTerms = Value(searchTerms);
+  static Insertable<NotesData> custom({
+    Expression<String>? title,
+    Expression<String>? content,
+    Expression<String>? searchTerms,
+  }) {
+    return RawValuesInsertable({
+      if (title != null) 'title': title,
+      if (content != null) 'content': content,
+      if (searchTerms != null) 'search_terms': searchTerms,
+    });
+  }
+
+  NotesCompanion copyWith(
+      {Value<String>? title,
+      Value<String>? content,
+      Value<String>? searchTerms}) {
+    return NotesCompanion(
+      title: title ?? this.title,
+      content: content ?? this.content,
+      searchTerms: searchTerms ?? this.searchTerms,
+    );
+  }
+
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    if (title.present) {
+      map['title'] = Variable<String>(title.value);
+    }
+    if (content.present) {
+      map['content'] = Variable<String>(content.value);
+    }
+    if (searchTerms.present) {
+      map['search_terms'] = Variable<String>(searchTerms.value);
+    }
+    return map;
+  }
+
+  @override
+  String toString() {
+    return (StringBuffer('NotesCompanion(')
+          ..write('title: $title, ')
+          ..write('content: $content, ')
+          ..write('searchTerms: $searchTerms')
+          ..write(')'))
+        .toString();
+  }
+}
+
+class Notes extends Table
+    with TableInfo<Notes, NotesData>, VirtualTableInfo<Notes, NotesData> {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  Notes(this.attachedDatabase, [this._alias]);
+  late final GeneratedColumn<String> title = GeneratedColumn<String>(
+      'title', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: '');
+  late final GeneratedColumn<String> content = GeneratedColumn<String>(
+      'content', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: '');
+  late final GeneratedColumn<String> searchTerms = GeneratedColumn<String>(
+      'search_terms', aliasedName, false,
+      type: DriftSqlType.string,
+      requiredDuringInsert: true,
+      $customConstraints: '');
+  @override
+  List<GeneratedColumn> get $columns => [title, content, searchTerms];
+  @override
+  String get aliasedName => _alias ?? 'notes';
+  @override
+  String get actualTableName => 'notes';
+  @override
+  Set<GeneratedColumn> get $primaryKey => <GeneratedColumn>{};
+  @override
+  NotesData map(Map<String, dynamic> data, {String? tablePrefix}) {
+    final effectivePrefix = tablePrefix != null ? '$tablePrefix.' : '';
+    return NotesData(
+      title: attachedDatabase.options.types
+          .read(DriftSqlType.string, data['${effectivePrefix}title'])!,
+      content: attachedDatabase.options.types
+          .read(DriftSqlType.string, data['${effectivePrefix}content'])!,
+      searchTerms: attachedDatabase.options.types
+          .read(DriftSqlType.string, data['${effectivePrefix}search_terms'])!,
+    );
+  }
+
+  @override
+  Notes createAlias(String alias) {
+    return Notes(attachedDatabase, alias);
+  }
+
+  @override
+  bool get dontWriteConstraints => true;
+  @override
+  String get moduleAndArgs =>
+      'fts5(title, content, search_terms, tokenize = "unicode61 tokenchars \'.\'")';
+}
+
+class GroupCountData extends DataClass {
+  final int id;
+  final String name;
+  final DateTime? birthday;
+  final int? nextUser;
+  final int groupCount;
+  const GroupCountData(
+      {required this.id,
+      required this.name,
+      this.birthday,
+      this.nextUser,
+      required this.groupCount});
+  factory GroupCountData.fromJson(Map<String, dynamic> json,
+      {ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return GroupCountData(
+      id: serializer.fromJson<int>(json['id']),
+      name: serializer.fromJson<String>(json['name']),
+      birthday: serializer.fromJson<DateTime?>(json['birthday']),
+      nextUser: serializer.fromJson<int?>(json['nextUser']),
+      groupCount: serializer.fromJson<int>(json['groupCount']),
+    );
+  }
+  @override
+  Map<String, dynamic> toJson({ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return <String, dynamic>{
+      'id': serializer.toJson<int>(id),
+      'name': serializer.toJson<String>(name),
+      'birthday': serializer.toJson<DateTime?>(birthday),
+      'nextUser': serializer.toJson<int?>(nextUser),
+      'groupCount': serializer.toJson<int>(groupCount),
+    };
+  }
+
+  GroupCountData copyWith(
+          {int? id,
+          String? name,
+          Value<DateTime?> birthday = const Value.absent(),
+          Value<int?> nextUser = const Value.absent(),
+          int? groupCount}) =>
+      GroupCountData(
+        id: id ?? this.id,
+        name: name ?? this.name,
+        birthday: birthday.present ? birthday.value : this.birthday,
+        nextUser: nextUser.present ? nextUser.value : this.nextUser,
+        groupCount: groupCount ?? this.groupCount,
+      );
+  @override
+  String toString() {
+    return (StringBuffer('GroupCountData(')
+          ..write('id: $id, ')
+          ..write('name: $name, ')
+          ..write('birthday: $birthday, ')
+          ..write('nextUser: $nextUser, ')
+          ..write('groupCount: $groupCount')
+          ..write(')'))
+        .toString();
+  }
+
+  @override
+  int get hashCode => Object.hash(id, name, birthday, nextUser, groupCount);
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      (other is GroupCountData &&
+          other.id == this.id &&
+          other.name == this.name &&
+          other.birthday == this.birthday &&
+          other.nextUser == this.nextUser &&
+          other.groupCount == this.groupCount);
+}
+
+class GroupCount extends ViewInfo<GroupCount, GroupCountData>
+    implements HasResultSet {
+  final String? _alias;
+  @override
+  final DatabaseAtV7 attachedDatabase;
+  GroupCount(this.attachedDatabase, [this._alias]);
+  @override
+  List<GeneratedColumn> get $columns =>
+      [id, name, birthday, nextUser, groupCount];
+  @override
+  String get aliasedName => _alias ?? entityName;
+  @override
+  String get entityName => 'group_count';
+  @override
+  String? get createViewStmt => null;
+  @override
+  GroupCount get asDslTable => this;
+  @override
+  GroupCountData map(Map<String, dynamic> data, {String? tablePrefix}) {
+    final effectivePrefix = tablePrefix != null ? '$tablePrefix.' : '';
+    return GroupCountData(
+      id: attachedDatabase.options.types
+          .read(DriftSqlType.int, data['${effectivePrefix}id'])!,
+      name: attachedDatabase.options.types
+          .read(DriftSqlType.string, data['${effectivePrefix}name'])!,
+      birthday: attachedDatabase.options.types
+          .read(DriftSqlType.dateTime, data['${effectivePrefix}birthday']),
+      nextUser: attachedDatabase.options.types
+          .read(DriftSqlType.int, data['${effectivePrefix}next_user']),
+      groupCount: attachedDatabase.options.types
+          .read(DriftSqlType.int, data['${effectivePrefix}group_count'])!,
+    );
+  }
+
+  late final GeneratedColumn<int> id =
+      GeneratedColumn<int>('id', aliasedName, false, type: DriftSqlType.int);
+  late final GeneratedColumn<String> name = GeneratedColumn<String>(
+      'name', aliasedName, false,
+      type: DriftSqlType.string);
+  late final GeneratedColumn<DateTime> birthday = GeneratedColumn<DateTime>(
+      'birthday', aliasedName, true,
+      type: DriftSqlType.dateTime);
+  late final GeneratedColumn<int> nextUser = GeneratedColumn<int>(
+      'next_user', aliasedName, true,
+      type: DriftSqlType.int);
+  late final GeneratedColumn<int> groupCount = GeneratedColumn<int>(
+      'group_count', aliasedName, false,
+      type: DriftSqlType.int);
+  @override
+  GroupCount createAlias(String alias) {
+    return GroupCount(attachedDatabase, alias);
+  }
+
+  @override
+  Query? get query => null;
+  @override
+  Set<String> get readTables => const {};
+}
+
+class DatabaseAtV7 extends GeneratedDatabase {
+  DatabaseAtV7(QueryExecutor e) : super(e);
+  DatabaseAtV7.connect(DatabaseConnection c) : super.connect(c);
+  late final Users users = Users(this);
+  late final Groups groups = Groups(this);
+  late final GroupCount groupCount = GroupCount(this);
+  late final Notes notes = Notes(this);
+  @override
+  Iterable<TableInfo<Table, dynamic>> get allTables =>
+      allSchemaEntities.whereType<TableInfo<Table, Object?>>();
+  @override
+  List<DatabaseSchemaEntity> get allSchemaEntities =>
+      [users, groups, groupCount, notes];
+  @override
+  int get schemaVersion => 7;
+  @override
+  DriftDatabaseOptions get options =>
+      const DriftDatabaseOptions(storeDateTimeAsText: true);
+}

examples/migrations_example/test/migration_test.dart

@@ -20,7 +20,30 @@ void main() {
     verifier = SchemaVerifier(GeneratedHelper());
   });
 
-  test('upgrade from v1 to v2', () async {
+  // Test all possible schema migrations with a simple test that just ensures
+  // the schema is correct after the migration.
+  // More complex tests ensuring data integrity are written below.
+  group('general migration', () {
+    const currentSchema = 7;
+
+    for (var oldVersion = 1; oldVersion < currentSchema; oldVersion++) {
+      group('from v$oldVersion', () {
+        for (var targetVersion = oldVersion + 1;
+            targetVersion <= currentSchema;
+            targetVersion++) {
+          test('to v$targetVersion', () async {
+            final connection = await verifier.startAt(1);
+            final db = Database(connection);
+            addTearDown(db.close);
+
+            await verifier.migrateAndValidate(db, targetVersion);
+          });
+        }
+      });
+    }
+  });
+
+  test('preserves existing data in migration from v1 to v2', () async {
     final schema = await verifier.schemaAt(1);
 
     // Add some data to the users table, which only has an id column at v1
@@ -41,23 +64,7 @@ void main() {
     await migratedDb.close();
   });
 
-  test('upgrade from v2 to v3', () async {
+  test('foreign key constraints work after upgrade from v4 to v5', () async {
-    final connection = await verifier.startAt(2);
-    final db = Database(connection);
-
-    await verifier.migrateAndValidate(db, 3);
-    await db.close();
-  });
-
-  test('upgrade from v3 to v4', () async {
-    final connection = await verifier.startAt(3);
-    final db = Database(connection);
-
-    await verifier.migrateAndValidate(db, 4);
-    await db.close();
-  });
-
-  test('upgrade from v4 to v5', () async {
     final schema = await verifier.schemaAt(4);
     final db = Database(schema.newConnection());
     await verifier.migrateAndValidate(db, 5);
@@ -112,12 +119,4 @@ void main() {
             .having((e) => e.groupCount, 'groupCount', 0)));
     await migratedDb.close();
   });
-
-  test('upgrade from v5 to v6', () async {
-    final connection = await verifier.startAt(5);
-    final db = Database(connection);
-    addTearDown(db.close);
-
-    await verifier.migrateAndValidate(db, 6);
-  });
 }