How to handle Special json POST with Flutter - arrays

Question

I have a JSON POST that I'm sending from my Flutter app as soon in the below code:
// class connecting value from the textfield to database with json
class LoginProfile {
int id;
String CardNumber;
String ExpiryDate;
String ExpiryYear;
String VerifyCode;
LoginProfile({this.id = 0,this.CardNumber
,this.ExpiryDate,this.ExpiryYear});
factory LoginProfile.fromJson(Map<String, dynamic> map) {
return LoginProfile(
id: map["id"],
CardNumber: map["CardNumber"],ExpiryDate: map["ExpiryDate"],ExpiryYear: map["ExpiryYear"]
);
}
Map<String, dynamic> toJson() {
return {"id": id,"CardNumber": CardNumber
,"ExpiryDate": ExpiryDate,"ExpiryYear": ExpiryYear};
}
#override
String toString() {
return 'Profile{id: $id, "CardNumber": CardNumber
,"ExpiryDate": ExpiryDate,"ExpiryYear": ExpiryYear}';
}
}
Future<bool> createProfile(LoginProfile data) async {
response = await client.post(
"$baseUrl",
headers: {'Content-Type': 'application/json; charset=UTF-8'},
body: loginProfileToJson(data),
);
if (response.statusCode == 201) {
return true;
} else {
print(response.body);
}
}
I am meant POST my JSON as below:
{
"Registration": {
"CardNumber":"5105105105105100",
"ExpiryDate":"11",
"ExpiryYear":"2023",
"VerifyCode":"123"
}
}
For some reason, I'm unable to make this work and I need to POST "Registration" as the object like it looks above.

Answer 1

Try with jsonEncode
Future<bool> createProfile(LoginProfile data) async {
response = await client.post(
"$baseUrl",
headers: {'Content-Type': 'application/json; charset=UTF-8'},
body: jsonEncode(loginProfileToJson(data)),
);
if (response.statusCode == 201 || response.statusCode == 200) {
return true;
} else {
print(response.body);
}