Parsing JSON data from a model PODO - json

Question

i have a PODO created for my model. See below:
class Data {
String? parentWo;
String? parentWoDesc;
String? parentWoStatus;
String? parentWoStatusDate;
String? parentWoWorkType;
String? parentWoClass;
String? parentWoCrew;
String? parentWoLead;
String? parentWoLocation;
String? parentWoDepartmentDescription;
String? parentWoSectionDescription;
List<Child>? children;
Data({
this.parentWo,
this.parentWoDesc,
this.parentWoStatus,
this.parentWoStatusDate,
this.parentWoWorkType,
this.parentWoClass,
this.parentWoCrew,
this.parentWoLead,
this.parentWoLocation,
this.parentWoDepartmentDescription,
this.parentWoSectionDescription,
this.children,
});
factory Data.fromJson(Map<String, dynamic> json) {
var list = json['children'] as List;
print(list.runtimeType);
List<Child> childrenlist = list.map((i) => Child.fromJson(i)).toList();
return Data(
parentWo: json["parentWo"] ?? 'VADER',
parentWoDesc: json["parentWoDesc"],
parentWoStatus: json["parentWoStatus"],
parentWoStatusDate: json["parentWoStatusDate"],
parentWoWorkType: json["parentWoWorkType"],
parentWoClass: json["parentWoClass"],
parentWoCrew: json["parentWoCrew"],
parentWoLead: json["parentWoLead"],
parentWoLocation: json["parentWoLocation"],
parentWoDepartmentDescription: json["parentWoDepartmentDescription"],
parentWoSectionDescription: json["parentWoSectionDescription"],
children:
childrenlist,
);
}
Map<String, dynamic> toJson() => {
"parentWo": parentWo,
"parentWoDesc": parentWoDesc,
"parentWoStatus": parentWoStatus,
"parentWoStatusDate": parentWoStatusDate,
"parentWoWorkType": parentWoWorkType,
"parentWoClass": parentWoClass,
"parentWoCrew": parentWoCrew,
"parentWoLead": parentWoLead,
"parentWoLocation": parentWoLocation,
"parentWoDepartmentDescription": parentWoDepartmentDescription,
"parentWoSectionDescription": parentWoSectionDescription,
"children": List<dynamic>.from(children!.map((x) => x.toJson())),
};
}
class Child {
String? woNum;
String? woDesc;
String? woStatus;
DateTime? woStatusDate;
String? woCrew;
String? woLead;
String? woLocation;
List<Materials>? materials;
Child({
this.woNum,
this.woDesc,
this.woStatus,
this.woStatusDate,
this.woCrew,
this.woLead,
this.woLocation,
this.materials,
});
factory Child.fromJson(Map<String, dynamic> json) {
var list = json['materials'] as List;
print(list.runtimeType);
List<Materials> materialslist = list.map((i) => Materials.fromJson(i)).toList();
return Child(
woNum: json["woNum"],
woDesc: json["woDesc"],
woStatus: json["woStatus"],
woStatusDate: DateTime.parse(json["woStatusDate"]),
woCrew: json["woCrew"],
woLead: json["woLead"],
woLocation: json["woLocation"],
materials: materialslist,
);
}
Map<String, dynamic> toJson() => {
"woNum": woNum,
"woDesc": woDesc,
"woStatus": woStatus,
"woStatusDate": woStatusDate!.toIso8601String(),
"woCrew": woCrew,
"woLead": woLead,
"woLocation": woLocation,
"materials": List<dynamic>.from(materials!.map((x) => x.toJson())),
};
get length => null;
}
class Materials {
String? itemNum;
String? itemDescription;
int? itemQuantityPlan;
int? itemQuantityIssued;
int? itemWoBalance;
int? itemInventoryBalance;
String? itemCommodity;
String? itemIssueUnit;
bool? itemStructure;
bool? itemDtPole;
Materials({
this.itemNum,
this.itemDescription,
this.itemQuantityPlan,
this.itemQuantityIssued,
this.itemWoBalance,
this.itemInventoryBalance,
this.itemCommodity,
this.itemIssueUnit,
this.itemStructure,
this.itemDtPole,
});
factory Materials.fromJson(Map<String, dynamic> json) => Materials(
itemNum: json["itemNum"],
itemDescription: json["itemDescription"],
itemQuantityPlan: json["itemQuantityPlan"],
itemQuantityIssued: json["itemQuantityIssued"],
itemWoBalance: json["itemWoBalance"],
itemInventoryBalance: json["itemInventoryBalance"],
itemCommodity: json["itemCommodity"],
itemIssueUnit: json["itemIssueUnit"],
itemStructure: json["itemStructure"],
itemDtPole: json["itemDtPole"],
);
Map<String, dynamic> toJson() => {
"itemNum": itemNum,
"itemDescription": itemDescription,
"itemQuantityPlan": itemQuantityPlan,
"itemQuantityIssued": itemQuantityIssued,
"itemWoBalance": itemWoBalance,
"itemInventoryBalance": itemInventoryBalance,
"itemCommodity": itemCommodity,
"itemIssueUnit": itemIssueUnit,
"itemStructure": itemStructure,
"itemDtPole": itemDtPole,
};
#override
String toString() {
// TODO: implement toString
return '$itemNum';
}
}
Now i'm having a hard time parsing the jsonresponse i got from the api. here's what i got (see comments on the code lines):
Future loadParent2() async {
Map data = {'wonum': WOInputted};
var bodyy = json.encode(data);
var jsonString = await http.post(
Uri.parse("https://sample.com.ph/extension/list/"),
headers: {
'Content-type': 'application/json',
'Authorization': 'Bearer $getAccessToken'
},
body: bodyy);
final jsonResponse = jsonDecode(jsonString.body);
final valueResponse = jsonResponse['results']['status_code'];
if (jsonString.statusCode == 200 && valueResponse == '1') {
print('NO RESULTS IN PARENT WO');
print('VALUE RESPONSE: $valueResponse');
} else if (jsonString.statusCode == 200 && valueResponse == '0') {
print('THIS HAVE RESULTS IN PARENT WO');
print('VALUE RESPONSE: $valueResponse');
sampleParentWO = jsonResponse['results']['data']['parentWo'];
final parentWOResponse = jsonResponse['results']['data'];
print(parentWOResponse); //CAN PRINT THIS RESPONSE, MEANING I GOT A RIGHT RESPONSE
Data dataPick = new Data.fromJson(parentWOResponse); //NOT SURE IF JSON RESPONSE IS SAVING TO MY MODEL PODO
print(dataPick.parentWo); //WHEN I TRY TO PRINT THIS THERE'S NO OUTPUT
mainParentPick = Data.fromJson(parentWOResponse);
print(mainParentPick.parentWo); //TRIED THIS BUT STILL NO OUTPUT
print(mainParentPick); //NO OUTPUT
return mainParentPick;
}
else {
throw Exception('Failed there\'s an error');
}
}
What am I missing here? do i need to do something else?
Hope someone helps me and point to the right direction.
Thank you for your time.

Answer 1

You can use json to dart online tools or can add plugin to Android Studio
One of dart generator online tool - Json Formatter Online Tool
Android Studio Plugin Json2Dart Plugin

Answer 2

There is casting error with your json response and response model
In your model, Type cast using Int.
int? itemQuantityPlan;
int? itemQuantityIssued;
int? itemWoBalance;
In your Response, There is double
"itemQuantityPlan": 1.0,
"itemQuantityIssued": 42.0,
"itemWoBalance": -41.0,
"itemInventoryBalance": -2602.47,

Answer 3

I have created a dart model by your Api response from here :
class ApiResponseModel {
Results? results;
ApiResponseModel({this.results});
ApiResponseModel.fromJson(Map<String, dynamic> json) {
results =
json['results'] != null ? new Results.fromJson(json['results']) : null;
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
if (this.results != null) {
data['results'] = this.results!.toJson();
}
return data;
}
}
class Results {
Data? data;
String? statusCode;
String? statusMsg;
Results({this.data, this.statusCode, this.statusMsg});
Results.fromJson(Map<String, dynamic> json) {
data = json['data'] != null ? new Data.fromJson(json['data']) : null;
statusCode = json['status_code'];
statusMsg = json['status_msg'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
if (this.data != null) {
data['data'] = this.data!.toJson();
}
data['status_code'] = this.statusCode;
data['status_msg'] = this.statusMsg;
return data;
}
}
class Data {
String? parentWo;
String? parentWoDesc;
String? parentWoStatus;
String? parentWoStatusDate;
String? parentWoWorkType;
String? parentWoClass;
String? parentWoCrew;
String? parentWoLead;
String? parentWoLocation;
String? parentWoDepartmentDescription;
String? parentWoSectionDescription;
List<Children>? children;
Data(
{this.parentWo,
this.parentWoDesc,
this.parentWoStatus,
this.parentWoStatusDate,
this.parentWoWorkType,
this.parentWoClass,
this.parentWoCrew,
this.parentWoLead,
this.parentWoLocation,
this.parentWoDepartmentDescription,
this.parentWoSectionDescription,
this.children});
Data.fromJson(Map<String, dynamic> json) {
parentWo = json['parentWo'];
parentWoDesc = json['parentWoDesc'];
parentWoStatus = json['parentWoStatus'];
parentWoStatusDate = json['parentWoStatusDate'];
parentWoWorkType = json['parentWoWorkType'];
parentWoClass = json['parentWoClass'];
parentWoCrew = json['parentWoCrew'];
parentWoLead = json['parentWoLead'];
parentWoLocation = json['parentWoLocation'];
parentWoDepartmentDescription = json['parentWoDepartmentDescription'];
parentWoSectionDescription = json['parentWoSectionDescription'];
if (json['children'] != null) {
children = <Children>[];
json['children'].forEach((v) {
children!.add(new Children.fromJson(v));
});
}
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['parentWo'] = this.parentWo;
data['parentWoDesc'] = this.parentWoDesc;
data['parentWoStatus'] = this.parentWoStatus;
data['parentWoStatusDate'] = this.parentWoStatusDate;
data['parentWoWorkType'] = this.parentWoWorkType;
data['parentWoClass'] = this.parentWoClass;
data['parentWoCrew'] = this.parentWoCrew;
data['parentWoLead'] = this.parentWoLead;
data['parentWoLocation'] = this.parentWoLocation;
data['parentWoDepartmentDescription'] = this.parentWoDepartmentDescription;
data['parentWoSectionDescription'] = this.parentWoSectionDescription;
if (this.children != null) {
data['children'] = this.children!.map((v) => v.toJson()).toList();
}
return data;
}
}
class Children {
String? woNum;
String? woDesc;
String? woStatus;
String? woStatusDate;
String? woCrew;
String? woLead;
String? woLocation;
List<Materials>? materials;
Children(
{this.woNum,
this.woDesc,
this.woStatus,
this.woStatusDate,
this.woCrew,
this.woLead,
this.woLocation,
this.materials});
Children.fromJson(Map<String, dynamic> json) {
woNum = json['woNum'];
woDesc = json['woDesc'];
woStatus = json['woStatus'];
woStatusDate = json['woStatusDate'];
woCrew = json['woCrew'];
woLead = json['woLead'];
woLocation = json['woLocation'];
if (json['materials'] != null) {
materials = <Materials>[];
json['materials'].forEach((v) {
materials!.add(new Materials.fromJson(v));
});
}
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['woNum'] = this.woNum;
data['woDesc'] = this.woDesc;
data['woStatus'] = this.woStatus;
data['woStatusDate'] = this.woStatusDate;
data['woCrew'] = this.woCrew;
data['woLead'] = this.woLead;
data['woLocation'] = this.woLocation;
if (this.materials != null) {
data['materials'] = this.materials!.map((v) => v.toJson()).toList();
}
return data;
}
}
class Materials {
String? itemNum;
String? itemDescription;
double? itemQuantityPlan;
int? itemQuantityIssued;
double? itemWoBalance;
double? itemInventoryBalance;
String? itemCommodity;
String? itemIssueUnit;
bool? itemStructure;
bool? itemDtPole;
Materials(
{this.itemNum,
this.itemDescription,
this.itemQuantityPlan,
this.itemQuantityIssued,
this.itemWoBalance,
this.itemInventoryBalance,
this.itemCommodity,
this.itemIssueUnit,
this.itemStructure,
this.itemDtPole});
Materials.fromJson(Map<String, dynamic> json) {
itemNum = json['itemNum'];
itemDescription = json['itemDescription'];
itemQuantityPlan = json['itemQuantityPlan'];
itemQuantityIssued = json['itemQuantityIssued'];
itemWoBalance = json['itemWoBalance'];
itemInventoryBalance = json['itemInventoryBalance'];
itemCommodity = json['itemCommodity'];
itemIssueUnit = json['itemIssueUnit'];
itemStructure = json['itemStructure'];
itemDtPole = json['itemDtPole'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['itemNum'] = this.itemNum;
data['itemDescription'] = this.itemDescription;
data['itemQuantityPlan'] = this.itemQuantityPlan;
data['itemQuantityIssued'] = this.itemQuantityIssued;
data['itemWoBalance'] = this.itemWoBalance;
data['itemInventoryBalance'] = this.itemInventoryBalance;
data['itemCommodity'] = this.itemCommodity;
data['itemIssueUnit'] = this.itemIssueUnit;
data['itemStructure'] = this.itemStructure;
data['itemDtPole'] = this.itemDtPole;
return data;
}
}
Step 2 : create function for calling api
Future<http.Response> getResponse(Map<String, String> request) async {
final response =
await http.post(Uri.parse(BASE_URL + "urlapilink"), body: request.toJson());
return response;
}
step 3 : get response from api :
ApiResponseModel apiResponseModel ;
getResponseFromApi(){
Map request = {'wonum': WOInputted};
getFirmDetails(request).then((value){
if(value.statusCode==200){
apiResponseModel = ApiResponseModel.fromJson(value.body);
}
});
}