query method

@override Future<List<AvatarModel>?> query({ String? tableName, bool? distinct, List<String>? columns, String? where, List<Object?>? whereArgs, String? groupBy, String? having, String? orderBy, int? limit, int? offset, })

调用sqflite 封装好的查询

Implementation

@override
Future<List<T>?> query(
    {String? tableName,
    bool? distinct,
    List<String>? columns,
    String? where,
    List<Object?>? whereArgs,
    String? groupBy,
    String? having,
    String? orderBy,
    int? limit,
    int? offset}) async {
  List<Map<String, Object?>> _lists = await _db.query(tableName ?? table,
      distinct: distinct,
      columns: columns,
      where: where,
      whereArgs: whereArgs,
      groupBy: groupBy,
      having: having,
      orderBy: orderBy,
      limit: limit,
      offset: offset);
  if (_lists.isEmpty) return null;
  List<T> _datas = [];
  for (Map<String, Object?> map in _lists) {
    _datas.add(fromJson(map));
  }
  return _datas;
}