Merge branch 'krille/fix-database-transaction' into 'master'

Database transaction workaround

See merge request famedly/famedlysdk!352

lib/src/database/database.dart

@@ -20,6 +20,18 @@ class Database extends _$Database {
 
   int get maxFileSize => 1 * 1024 * 1024;
 
+  @override
+  Future<T> transaction<T>(Future<T> Function() action) async {
+    try {
+      await super.transaction(() async {
+        await customSelect('SELECT 1').get();
+      });
+    } catch (_) {
+      return action();
+    }
+    return super.transaction(action);
+  }
+
   @override
   MigrationStrategy get migration => MigrationStrategy(
         onCreate: (Migrator m) {