How to solve: The argument type 'dynamic' can't be assigned to the parameter type &#0-CodePudding

I always get the error The argument type 'dynamic' cannot be assigned to the parameter type 'Iterable' for the line json["geraete"].map((x) => RDevice.fromJson(x)), can someone help me?

factory Reservation.fromJson(Map<String, dynamic> json) => Reservation(*emphasized text*
        resNr: json['resNr'] as int,
        vbid: json['vbid'] as int,
        benutzer: json['benutzer'] as String,
        geraete:  List<RDevice>.from(**json["geraete"].map((x) => RDevice.fromJson(x))**),
          von: json['von'] as String,
          bis: json['bis'] as String,
        abgabe: json['abgabe'] as String,
          abholung: json['abholung'] as String,
          rdatum: json['rdatum'] as String,
          status: json['status'] as String,
          startTime: json['startTime'] as int, // slot nummer
          endTime: json['endTime'] as int,
      );

Here is the part from my RDevice class

factory RDevice.fromJson(Map<String, dynamic> json) => RDevice(
        id: json['id'] as int,
        resid: json['resid'] as int,
        deviceid: json['geraetid'] as int,
        description: json['bezeichnung'] as String,
      );

CodePudding user response：

Try to change it to

geraete:  List<RDevice>.from((json["geraete"] as List<Map<String, dynamic>>).map((x) => RDevice.fromJson(x))),