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Parsing JSON data from a model PODO

Time：07-28

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.

CodePudding user response：

You can use json to dart online tools or can add plugin to Android Studio

  1. One of dart generator online tool - Json Formatter Online Tool
  2. Android Studio Plugin Json2Dart Plugin

CodePudding user response：

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);
    }
        });
      }

CodePudding user response：

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,

Page link：https//www.codepudding.com/os/491306.html

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