新版本cloud_firestore：^4.5.1允许通过“or”和“and”进行过滤：

Future<List> getListModelos() async {
  List objetoList1 = [];
  Query<Map<String, dynamic>> collectionReferenceObjetoList1 =
      db.collection('/modelos').where(
            Filter.and(
              Filter("name", isEqualTo: "John"),
              Filter("id", isEqualTo: "01"),
            ),
          );
  QuerySnapshot queryObjetoList1 = await collectionReferenceObjetoList1.get();
  queryObjetoList1.docs.forEach((documento) {
    objetoList1.add(documento.data());
  });
  return objetoList1;
}

我在这里找到了这个有用的信息：How to add an OR condition to flutter Firebase queries
但是，当尝试“isEqualTo”+“isNotEqualTo”时，查询不会返回任何内容：

db.collection('/modelos').where(
            Filter.and(
              Filter("name", isEqualTo: "John"),
              Filter("id", isNotEqualTo: "null"),
            ),
          );

是否有任何方法或建议从Flutter查询到Firebase，允许“选择isEqual和isNotEqual”？