Fabian Reyes's questions

I have a doubt about an asynchronous situation, I have the following function:

    @override
      Future<Consulta> checkPayment() async {
        String url = 'http......'
    
        final response = await HttpClientAdapter.get(url: url);
    
        if (response.statusCode == 200 || response.statusCode == 201) {

          final respuestaConsulta =
              Consulta.fromJson(json.decode(response.body));
          
          // (1) PRIMERA LLAMADA EL RESULTADO ES PENDING
          // (2) SEGUNDA LLAMADA EL RESULTADO ES DECLINED
          print(respuestaConsulta.data.status); 


          if (respuestaConsulta.data.status == 'PENDING') {
            await Future.delayed(const Duration(seconds: 1), checkPayment);
          }
          // (3) SE EJECUTA AL FINALIZAR PERO EL RESULTADO SIEMPRE ES PENDING, 
          // DEBERIA RETORNAR EL RESULTADO DE LA TRANSACCION, EN ESTE CASO DECLINED
          return respuestaConsulta;
        } else {
          throw ArgumentError(response.body);
        }
      }

The general idea is that the function long polls the API until the status of the transaction is something other than "PENDING"; To do this, if the result is not the desired one, the function is executed again with the Future so that the API call is repeated.

Apparently everything works fine, but I have only one drawback:

In the break (1) => The result is PENDING as it is the first call

In the break (2) => The result is DECLINED (After re-executing with the Future)

At break (3) => The result is still PENDING (even after making the previous calls again)

Therefore, when calling the function, the result will always be PENDING.

final check = await checkPayment(); // AQUI SIEMPRE RETORNA PENDING

The return should not return the result of the last execution of this method?

final respuestaConsulta = Consulta.fromJson(json.decode(response.body));

I have the following code:

    import SwiftUI
    import QGrid
    
    struct VerCanales: View {
        
        var categoria:String
        @ObservedObject var canales = CargarCanales(categoriaID: categoria)
        
        var body: some View {
            NavigationView{
                QGrid(self.canales.listaCanales, columns: 3){item in
                    NavigationLink(destination:VlcPlayerDemo()){
                        Text(item.name).frame(width:400, height:50)
                    }
                }
                
            }.navigationBarTitle(Text("CHANNELS AVAILABLE"))
        }
    }

The variable "category" comes from the above view as a parameter and I need to pass it as a parameter to the @ObservedObject but I get the following error: "Cannot use instance member 'category' within property initializer; property initializers run before 'self' is available"

I guess you mean that I can't use the variable since it hasn't been initialized.

I am new to the language and have searched but can't find a good solution

I would like to know if there is any way to execute a function when creating an order in WooCommerce. I have seen the Code Snippets module but I don't know what the function that creates the order is called or how to fire it.

The idea is that when a client creates a new order, a POST request is made to my server to send a notification to the user's mobile.

I appreciate any help

Friends, I am in a project where I need to access the information of a fairly complex JSON.

This is the one for the episodes. I need to access the "season", "info" and "episodes" properties but I can't figure out how to do it.

Create the model from quicktype.io and I am using the following parse to access the data:

class SeasonsProvider {
  final String url =
      'url_api';

  Future<List<Season>> cargarTemporadaSerie(serieId) async {

final String urlfinal = url + '${serieId}';
final resp = await http.get(urlfinal);

final Map<String, dynamic> decodedData = json.decode(resp.body);
final List<Season> seasons = new List();

if (decodedData == null) return [];
decodedData.forEach((nombre, season) {
  final seasonTemp = Season.fromJson(season);
  seasonTemp.name = nombre;
  season.add(seasonTemp);
});
return seasons;

} }

The problem is that it does not do a correct conversion of the JSON format and I cannot get the data, I get the following exception.

I need to get a list with the parameter "name"

You will see I need to save the data of a list of items in SQFlite, I am doing it with this procedure

void cargarusuarios() {
      res.forEach((cliente) {
        usuario.usuario = cliente[0].toString();
        usuario.telefono = cliente[1].toString();
        usuario.fechaexpira = cliente[2].toString();
        usuario.email = cliente[3].toString();
        usuario.plan = cliente[4].toString();
        usuario.conexiones = cliente[5].toString();
        DBProvider.db.nuevoUsuario(usuario);
      });
  }

The problem is, the save procedure is executed correctly according to the number of clients, but in all of them only the information corresponding to the last one is saved.

I would think that in each of the steps it would save the information of that iteration and in the following ones it would act in the same way.

Good morning, I launched my application to the Playstore and I have a problem with the ads. It turns out that when a user installs it for the first time, the ads take around 2 hours to load, but when they have already installed it, they load immediately. This is a problem for me since I want to invest in advertising but I would lose all those first round ads. My question is, will this always be like this? It is my mistake? is it temporary? Beforehand thank you very much. I don't have much experience with ads

I want to load the data saved in a SQlite database into Flutter. I don't want to use the FutureBuilder method since it generates a widget and what I need is to do some validation procedures.

I am using the code:

Future cargarcarros() async {
    final carros = await DBProvider.db.getTodosVehiculos();

    for (int i = 1; i <= carros.length; i++) {
      final db = await DBProvider.db.getVehiculoId(i);
      String placanumero = db.placa.replaceAll(RegExp(r'[a-zA-Z]'), "");
      String ultimo = placanumero.substring(placanumero.length - 1);
      //shownotification(db.placa);
      return print(ultimo);
    }
{
  }

This code only returns the first value of the list of items from the database.

How can I manage to load all the items and make the iteration work correctly.

I have this code that generates a listview.builder with the items extracted from the database. Now, I need that when I touch each item, the id of that item is passed to the next screen to work with it and do another procedure.

The function of moving to the other page works correctly, but when including the vehicle.id within the procedure, the function throws an error. The database is SQFlite.

The idea is to pass that parameter to several screens to generate specific calculations with each one of the id's separately.

import 'package:flutter/material.dart';
import 'package:mipicoyplaca/modelos/vehiculo_model.dart';
import 'package:mipicoyplaca/paginas/mipicoyplaca.dart';
import 'package:mipicoyplaca/providers/db_provider.dart';

class VehiculosPage extends StatefulWidget {
  @override
  _VehiculosPageState createState() => _VehiculosPageState();
}

class _VehiculosPageState extends State<VehiculosPage> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
          padding: EdgeInsets.symmetric(vertical: 30.0, horizontal: 10.0),
          child: _crearListaVehiculos()),
    );
  }

  Widget _crearListaVehiculos() {
    return FutureBuilder(
      future: DBProvider.db.getTodosVehiculos(),
      builder:
          (BuildContext context, AsyncSnapshot<List<VehiculoModel>> snapshot) {
        if (snapshot.hasData) {
          final vehiculos = snapshot.data;
          return ListView.builder(
            itemCount: vehiculos.length,
            itemBuilder: (context, i) => _crearItem(context, vehiculos[i]),
          );
        } else {
          return Center(child: CircularProgressIndicator());
        }
      },
    );
  }

  Widget _crearItem(BuildContext context, VehiculoModel vehiculo) {
    return Dismissible(
      key: UniqueKey(),
      onDismissed: (direccion) {
        DBProvider.db.deleteVehiculo(vehiculo.id);
      },
      child: Column(
        //crossAxisAlignment: CrossAxisAlignment.center,
        //mainAxisAlignment: MainAxisAlignment.spaceAround,
        children: <Widget>[
          RaisedButton(
              shape: RoundedRectangleBorder(
                  side: BorderSide(color: Colors.black),
                  borderRadius: new BorderRadius.circular(10.0)),
              elevation: 15.0,
              color: Colors.yellow,
              child: Text('${vehiculo.placa}',
                  style: TextStyle(
                      color: Colors.black,
                      fontSize: 80.0,
                      fontWeight: FontWeight.bold)),
              onPressed: () {
                Navigator.push(
                  context,
                  MaterialPageRoute(builder: (context) => MiPicoyPlaca(vehiculo.id)), //AQUÍ ESTA EL ERROR AL PASAR EL ARGUMENTO
                );
              }),
          Text('Desliza para eliminiar vehiculo',
              style: TextStyle(fontSize: 16.0, fontWeight: FontWeight.bold)),
          SizedBox(
            height: 20.0,
          )
        ],
      ),
    );
  }
}