CODEWITHSUNDEEP
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Kaisama
Kaisama

Reputation: 101

FormatException in flutter

i'm trying to send data to my server using post http method. Backend works perfectly (test made with postman) but i'm getting this error in flutter!

here is my code:

Future<MesureModel?> postMeasurement(String description) async {
    final response = await http.post(
        Uri.parse('${baseUrl}/api/v1/measurements/create'),
        body: {"description": description});
    var data = response.body;
    return MesureModel.fromJson(jsonDecode(response.body));
  }

and here is my model:

List<MesureModel> mesureModelFromJson(String str) => List<MesureModel>.from(
    json.decode(str).map((x) => MesureModel.fromJson(x)));

String mesuretModelToJson(List<MesureModel> data) =>
    json.encode(List<dynamic>.from(data.map((x) => x.toJson())));

class MesureModel {
  MesureModel(
      {required this.measurement_id,
      required this.measured_value,
      required this.taken_by,
      required this.param_name,
      required this.description});

  int measurement_id;
  double measured_value;
  String taken_by;
  String param_name;
  String description;

  factory MesureModel.fromJson(Map<String, dynamic> json) => MesureModel(
      measurement_id: json["measurement_id"],
      measured_value: json["measured_value"],
      taken_by: json["taken_by"],
      param_name: json["param_name"],
      description: json["description"]);

  Map<String, dynamic> toJson() => {
        "measurement_id": measurement_id,
        "measured_value": measured_value,
        "taken_by": taken_by,
        "param_name": param_name,
        "description": description
      };
}

I would be grateful if anyone could help me!

Upvotes: 0

Views: 613

Answers (2)

Kaushik Chandru
Kaushik Chandru

Reputation: 17792

Future<MesureModel?> postMeasurement(String description) async {
final response = await http.post(
    Uri.parse('${baseUrl}/api/v1/measurements/create'),
headers: {
  'Content-Type': 'application/json',
},
    body: json.encode({"input_description": description}));
var data = response.body;
return MesureModel.fromJson(jsonDecode(response.body));
}

Json encode the body before sending

Upvotes: 1

Besnik
Besnik

Reputation: 6529

You should specify Content-Type and encode payload

  final response = await http.post(
    Uri.parse('${baseUrl}/api/v1/measurements/create'),
    headers: <String, String>{
      'Content-Type': 'application/json; charset=UTF-8',
    },
    body: jsonEncode(<String, String>{
      "description": description,
    }),
  );

  var data = response.body;
  return MesureModel.fromJson(jsonDecode(response.body));

Upvotes: 1

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