firebase - 输入'_MapStream>' 不是类型“列表”的子类型' 在类型转换中

Question

这是代码的样子：

https://i.stack.imgur.com/bhPnY.png

RoomModel 看起来像这样。

RoomModel.fromFirestore(Map firestore)
  : roomId = firestore['roomId'],
    price = firestore['price'],
    location = firestore['location'],
    street = firestore['street'],
    description = firestore['description'],
    gender = firestore['gender'],
    userId = firestore['userId'];

错误： https ://i.stack.imgur.com/mRuxo.png

任何帮助或建议都会有所帮助。

标签： firebasefluttergoogle-cloud-firestore