fetchAll static method Null safety

Future<List<LCObject>> fetchAll(List<LCObject> objectList)

Fetches all objects in objectList.

Implementation

static Future<List<LCObject>> fetchAll(List<LCObject> objectList) async {
  Set<LCObject> objects = objectList.where((item) {
    return item.objectId != null;
  }).toSet();
  List requestList = objects.map((item) {
    String path = '/$APIVersion/classes/${item.className}/${item.objectId}';
    return {'path': path, 'method': 'GET'};
  }).toList();

  // 发送请求
  Map<String, dynamic> data = {
    'requests': _LCEncoder.encodeList(requestList)
  };
  List results = await LeanCloud._httpClient.post('batch', data: data);
  // 反序列化为 Object 数据
  Map<String, _LCObjectData> map = new Map<String, _LCObjectData>();
  results.forEach((item) {
    if (item.containsKey('error')) {
      int code = item['code'];
      String message = item['error'];
      throw ('$code : $message');
    }
    Map<String, dynamic> data = item['success'];
    map[data['objectId']] = _LCObjectData.decode(data);
  });
  objectList.forEach((object) {
    _LCObjectData? objectData = map[object.objectId];
    object._merge(objectData);
  });
  return objectList;
}