ofClass<T> method

Future<List<T>> ofClass<T>(
  1. Type type, {
  2. int limit = 10,
  3. String? subcollection,
})

Lists a limited number of items of a specific type without a query.

Implementation

Future<List<T>> ofClass<T>(Type type, { int limit = 10, String? subcollection }) async {
  if (T.toString() != type.toString()) {
    throw ArgumentError("Type mismatch. Attempting to list items of type '${T.toString()}', but parameter type was ${type.toString()}");
  }

  final deserializer = RDB.deserializers[type];
  if (deserializer == null) {
    throw UnsupportedError('No deserializer found for type: $type. Consider re-generating Firestorm data classes.');
  }

  List<T> objects = [];
  final String path = RDB.constructPathForClass(type, subcollection: subcollection);
  final Query query = RDB.instance.ref(path).limitToFirst(limit);
  final DataSnapshot snapshot = await query.get();
  if (snapshot.exists) {
    for (final childSnapshot in snapshot.children) {
      final Map<String, dynamic> map = RDBDeserializationHelper.snapshotToMap(childSnapshot);
      objects.add(deserializer(map));
    }
  }
  return objects;
}