Unable to Post form Data to Discord webhook URL

json flutter dart

411

This is causing your error, read the debug console output:

 Unhandled Exception: Converting object to an encodable object failed: Instance of 'DateTime'

It's being caused by this line:

"content": json.encode([
        DateTime.now(),

Try:

DateTime.now().toIsoString()

You might also face another error after you get past this one, depending on how you have location and achievements stored.

411

Author by

artistAhmed

Updated on November 23, 2022

Comments

artistAhmed 7 months

My same code works with my other project but not this one?

This is my Form Screen which uses the same exact method as my previous project and it worked fine in the beginning but doesn't work now.

I am posting form data to a discord webhook which I have removed of course, upon saving the form I am calling the function which posts to the discord URL, it used to work fine in my previous project.

Check the bottom of the code to see where I am calling the function

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:relationship/services/data_model.dart';

void main() {
  runApp(FormClass());
}

class FormClass extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => _FormState();
}

class _FormState extends State<FormClass> {
  final _formKey = GlobalKey<FormState>();

  final _user = DataModel();

  @override
  void initState() {
    super.initState();
  }

  double sliderValA = 0.0;
  double sliderValB = 0.0;
  double sliderValC = 0.0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text('Personal Log')),
        body: Container(
            padding: EdgeInsets.symmetric(horizontal: 10),
            child: Builder(
                builder: (context) => Form(
                    key: _formKey,
                    child: SingleChildScrollView(
                        child: Column(
                            crossAxisAlignment: CrossAxisAlignment.stretch,
                            children: [
                          SizedBox(
                            height: 20,
                          ),
                          TextFormField(
                            decoration: InputDecoration(
                                labelText: "Enter Location",
                                border: OutlineInputBorder()),
                            validator: (value) {
                              if (value!.isEmpty) {
                                return 'Enter Location !!!';
                              }
                              return null;
                            },
                            onSaved: (val) =>
                                setState(() => _user.location = val!),
                          ),
                          SizedBox(
                            height: 20,
                          ),
                          TextFormField(
                            decoration: InputDecoration(
                                labelText: "Enter Logs",
                                border: OutlineInputBorder()),
                            validator: (value) {
                              if (value!.isEmpty) {
                                return 'Enter Logs !!!';
                              }
                              return null;
                            },
                            onSaved: (val) => setState(() => _user.log = val!),
                          ),
                          SizedBox(
                            height: 20,
                          ),
                          Slider(
                              value: sliderValA,
                              min: 0,
                              max: 5,
                              divisions: 5,
                              label: "Alertness",
                              onChanged: (val) {
                                setState(() {
                                  sliderValA = val;
                                  _user.alertness = val;
                                });
                              }),
                          SizedBox(
                            height: 20,
                          ),
                          Slider(
                              value: sliderValB,
                              min: 0,
                              max: 5,
                              divisions: 5,
                              label: "Hunger",
                              onChanged: (val) {
                                setState(() {
                                  sliderValB = val;
                                  _user.hunger = val;
                                });
                              }),
                          SizedBox(
                            height: 20,
                          ),
                          Slider(
                              value: sliderValC,
                              min: 0,
                              max: 5,
                              divisions: 5,
                              label: "Thirst",
                              onChanged: (val) {
                                setState(() {
                                  sliderValC = val;
                                  _user.thirst = val;
                                });
                              }),
                          SizedBox(
                            height: 20,
                          ),
                          Container(
                            child: Text('Achievments'),
                          ),
                          SizedBox(
                            height: 20,
                          ),
                          CheckboxListTile(
                              title: const Text('Job'),
                              value: _user.achievments[DataModel.job],
                              onChanged: (val) {
                                setState(() =>
                                    _user.achievments[DataModel.job] = val!);
                              }),
                          CheckboxListTile(
                              title: const Text('Side Project'),
                              value: _user.achievments[DataModel.sideP],
                              onChanged: (val) {
                                setState(() =>
                                    _user.achievments[DataModel.sideP] = val!);
                              }),
                          CheckboxListTile(
                              title: const Text('Meal'),
                              value: _user.achievments[DataModel.meal],
                              onChanged: (val) {
                                setState(() =>
                                    _user.achievments[DataModel.meal] = val!);
                              }),
                          CheckboxListTile(
                              title: const Text('Exercise'),
                              value: _user.achievments[DataModel.exercise],
                              onChanged: (val) {
                                setState(() => _user
                                    .achievments[DataModel.exercise] = val!);
                              }),
                          CheckboxListTile(
                              title: const Text('Social'),
                              value: _user.achievments[DataModel.social],
                              onChanged: (val) {
                                setState(() =>
                                    _user.achievments[DataModel.social] = val!);
                              }),
                          CheckboxListTile(
                              title: const Text('Study'),
                              value: _user.achievments[DataModel.study],
                              onChanged: (val) {
                                setState(() =>
                                    _user.achievments[DataModel.study] = val!);
                              }),
                          SizedBox(
                            height: 20,
                          ),
                          Container(
                              // ignore: deprecated_member_use
                              child: RaisedButton(
                                  onPressed: () {
                                    final form = _formKey.currentState;
                                    if (form!.validate()) {
                                       form.save();
                                      _user.makePostRequest();
                                    }
                                  },
                                  child: Text('Save'))),
                        ]))))));
  }
}

This is my main.dart class

import 'package:flutter/material.dart';
import 'package:relationship/screens/form_screen.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: FormClass(),
    );
  }
}

This is the method

makePostRequest() async {
    final uri = Uri.parse(
        'My URL');
    final header = {'Content-Type': 'application/json'};
    Map<String, dynamic> body = {
      "content": json.encode([
        DateTime.now(),
        location,
        log,
        achievments,
        "Alertness $alertness",
        "Hunger $hunger",
        "Thirst $thirst"
      ]) // Change this line
    };
    String jsonBody = json.encode(body);
    Response response = await post(
      uri,
      headers: header,
      body: jsonBody,
    );

    int statusCode = response.statusCode;
    String responseBody = response.body;

    print(statusCode);
    print(responseBody);
  }

P.S I have checked the URL by posting from previous apk and it posts data within a second

Here is the Response Code

`Launching lib\main.dart on vivo 1906 in debug mode...
√  Built build\app\outputs\flutter-apk\app-debug.apk.
I/flutter (24141): Observatory listening on ************************************
I/flutter (24588): Observatory listening on ************************************
E/flutter (24588): [ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: Converting object to an encodable object failed: Instance of 'DateTime'
E/flutter (24588): #0      _JsonStringifier.writeObject (dart:convert/json.dart:688:7)
E/flutter (24588): #1      _JsonStringifier.writeList (dart:convert/json.dart:736:7)
E/flutter (24588): #2      _JsonStringifier.writeJsonValue (dart:convert/json.dart:718:7)
E/flutter (24588): #3      _JsonStringifier.writeObject (dart:convert/json.dart:679:9)
E/flutter (24588): #4      _JsonStringStringifier.printOn (dart:convert/json.dart:877:17)
E/flutter (24588): #5      _JsonStringStringifier.stringify (dart:convert/json.dart:862:5)
E/flutter (24588): #6      JsonEncoder.convert (dart:convert/json.dart:262:30)
E/flutter (24588): #7      JsonCodec.encode (dart:convert/json.dart:172:45)
E/flutter (24588): #8      DataModel.makePostRequest
E/flutter (24588): #9      _FormState.build.<anonymous closure>.<anonymous closure>
E/flutter (24588): #10     _InkResponseState._handleTap
E/flutter (24588): #11     GestureRecognizer.invokeCallback
E/flutter (24588): #12     TapGestureRecognizer.handleTapUp
E/flutter (24588): #13     BaseTapGestureRecognizer._checkUp
E/flutter (24588): #14     BaseTapGestureRecognizer.acceptGesture
E/flutter (24588): #15     GestureArenaManager.sweep
E/flutter (24588): #16     GestureBinding.handleEvent
E/flutter (24588): #17     GestureBinding.dispatchEvent
E/flutter (24588): #18     RendererBinding.dispatchEvent
E/flutter (24588): #19     GestureBinding._handlePointerEventImmediately
E/flutter (24588): #20     GestureBinding.handlePointerEvent
E/flutter (24588): #21     GestureBinding._flushPointerEventQueue
E/flutter (24588): #22     GestureBinding._handlePointerDataPacket
E/flutter (24588): #23     _rootRunUnary (dart:async/zone.dart:1370:13)
E/flutter (24588): #24     _CustomZone.runUnary (dart:async/zone.dart:1265:19)
E/flutter (24588): #25     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1170:7)
E/flutter (24588): #26     _invoke1 (dart:ui/hooks.dart:182:10)
E/flutter (24588): #27     PlatformDispatcher._dispatchPointerDataPacket (dart:ui/platform_dispatcher.dart:282:7)
E/flutter (24588): #28     _dispatchPointerDataPacket (dart:ui/hooks.dart:96:31)
E/flutter (24588):
Exited (1)```

Huthaifa Muayyad almost 2 years

What is the response, what is the status code? What is the result of this call?
artistAhmed almost 2 years

That is the problem I have to build the apk and flutter install it each time, the debug console is stuck at Launching lib\main.dart on vivo 1906 in debug mode...
artistAhmed almost 2 years

I have edited my question

artistAhmed almost 2 years

location is just text in a string and achievements go like this `Map<String, bool> achievments = { job: false, sideP: false, meal: false, exercise: false, social: false, study: false, };
artistAhmed almost 2 years

Thank you it works fine now, I did it toString(), How can I make a progress indicator? On button click if successfully posted any ideas?
Huthaifa Muayyad almost 2 years

Please mark it as the correct answer to your question. Thanks!
Huthaifa Muayyad almost 2 years

You might need to change it into a stateful widget, and use setState to show a CircularProgressIndicator or depending on the result if status code is 200 for example.
artistAhmed almost 2 years

Why to a stateful widget? I have already converted my main.dart to a stateful widget, won't that throw to many states error
Huthaifa Muayyad almost 2 years

You cannot change the UI without using setState or a state management solution.