使用dart创建post请求，将信息作为json数据通过请求体传递

Question

调用API模型

APIService apiService = new APIService();
apiService
.createsShowroom(autoModel)
.then((value) {
if (value.id != null) {
print('Added Successfully');
Navigator.of(context).pushNamed('/home');
} else {
print('not added');
}
});

API请求

//Create Showroom Details
Future<AutogeneratedResponse> createsShowroom(AutogeneratedRequest autoModel) async {
String showroomCreateUrl =
"here is the url";
print(autoModel.toJson());
final res = await http.post(
Uri.parse(showroomCreateUrl),
body: autoModel.toJson(),
headers: <String, String>{
'accept': 'application/json',
'Authorization': 'Bearer $token',
},
);
if (res.statusCode == 200 || res.statusCode == 400) {
return AutogeneratedResponse.fromJson(json.decode(res.body));
} else {
throw Exception('Failed to load data');
}
}

我的对象模型

class AutogeneratedResponse{
String website;
String location;
String linkedin;
Null manufacturer;
String locality;
int ownerID;
int id;
String startTiming;
String state;
String name;
String endTiming;
String pincode;
String email;
String gstNumber;
String whatsapp;
String contactPerson;
String daysOpen;
String facebook;
String telephone;
String address;
String instagram;
String mobile;
String twitter;
AutogeneratedResponse(
{this.website,
this.location,
this.linkedin,
this.manufacturer,
this.locality,
this.ownerID,
this.id,
this.startTiming,
this.state,
this.name,
this.endTiming,
this.pincode,
this.email,
this.gstNumber,
this.whatsapp,
this.contactPerson,
this.daysOpen,
this.facebook,
this.telephone,
this.address,
this.instagram,
this.mobile,
this.twitter});
AutogeneratedResponse.fromJson(Map<String, dynamic> json) {
website = json['website'];
location = json['location'];
linkedin = json['linkedin'];
manufacturer = json['manufacturer'];
locality = json['locality'];
ownerID = json['ownerID'];
id = json['id'];
startTiming = json['start_timing'];
state = json['state'];
name = json['name'];
endTiming = json['end_timing'];
pincode = json['pincode'];
email = json['email'];
gstNumber = json['gst_number'];
whatsapp = json['whatsapp'];
contactPerson = json['contact_person'];
daysOpen = json['days_open'];
facebook = json['facebook'];
telephone = json['telephone'];
address = json['address'];
instagram = json['instagram'];
mobile = json['mobile'];
twitter = json['twitter'];
}
}

class AutogeneratedRequest{
String name;
String email;
String contactPerson;
String telephone;
String mobile;
String website;
String startTiming;
String endTiming;
String gstNumber;
String daysOpen;
String address;
String locality;
String location;
String state;
String pincode;
String whatsapp;
String facebook;
String instagram;
String twitter;
String linkedin;
AutogeneratedRequest(
{this.name,
this.email,
this.contactPerson,
this.telephone,
this.mobile,
this.website,
this.startTiming,
this.endTiming,
this.gstNumber,
this.daysOpen,
this.address,
this.locality,
this.location,
this.state,
this.pincode,
this.whatsapp,
this.facebook,
this.instagram,
this.twitter,
this.linkedin});
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['name'] = this.name;
data['email'] = this.email;
data['contact_person'] = this.contactPerson;
data['telephone'] = this.telephone;
data['mobile'] = this.mobile;
data['website'] = this.website;
data['start_timing'] = this.startTiming;
data['end_timing'] = this.endTiming;
data['gst_number'] = this.gstNumber;
data['days_open'] = this.daysOpen;
data['address'] = this.address;
data['locality'] = this.locality;
data['location'] = this.location;
data['state'] = this.state;
data['pincode'] = this.pincode;
data['whatsapp'] = this.whatsapp;
data['facebook'] = this.facebook;
data['instagram'] = this.instagram;
data['twitter'] = this.twitter;
data['linkedin'] = this.linkedin;
return data;
}
}

为模型创建对象，并将参数传递给构造函数。正在调用API并抛出为不将数据加载到服务器而设置的异常，并且在服务器日志中获取不可处理的标识，这意味着在发送请求时出现了一些错误。请看一下。

Answer 1

请使用将JSON对象转换为String

json.encode(autoModel.toJson())