deleteWhere method
Delete items that match spec
within the scope
.
Applies soft/hard delete semantics in the same way as deleteMany.
Returns the number of affected rows if available, else -1.
Implementation
@override
Future<int> deleteWhere(SyncScope scope, store.QuerySpec spec) async {
final matched = await queryWith(scope, spec);
if (matched.isEmpty) return 0;
final ids = matched.map(idOf).toList(growable: false);
await deleteMany(scope, ids);
return ids.length;
}