命令文件中的可为空值

Question

我实际上正在做一个 symfony 项目，我必须进入 DB 中的所有出租车以及一些关于它们的信息，并让它们写入 CSV 文件。

为此，我创建了一个 CiblageCommand 文件：

<?php

namespace AppBundle\Command;

use AppBundle\Entity\Taxi;
use AppBundle\Entity\StatutTaxi;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\Console\Style\SymfonyStyle;
use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;

class CiblageCommand extends ContainerAwareCommand
{
private $em;

public function __construct(EntityManagerInterface $em)
{
    parent::__construct();
    $this->em = $em;
}

protected function configure()
{
    $this
        //the short description shown while running "php bin/console list"
        ->setDescription('cible les taxis')
        //commande
        ->setname('ciblage')//php bin/console ciblage
        //the full command descriptionn shown when running the command with
        //the "--help" option
        ->setHelp('Cette commande permet de cibler les taxis valides présents'
            .' dans la BDD et de leur générer un PDF conforme.')
        ;
}

protected function execute(InputInterface $input, OutputInterface $output)
{
    $io = new SymfonyStyle($input, $output);
    $io->title("Lancement de la génération");

    $io->title("\nListage des taxis");
    $this->create();/*
    $io->title("\nCiblage terminé");

    $io->title("\nGénération des courriers");
    $this->generation();
    */
    $io->success("\nGénération terminée");
}

protected function create()
{
    $repository_taxi = $this->em->getRepository('AppBundle:Taxi');
    $listTaxi = $repository_taxi->findAll();

    $doctrine = $this->getContainer()->get('doctrine');
    $em = $doctrine->getEntityManager();

    $handle = fopen('CSVTaxi', 'w+');
    fputcsv($handle, ['IDENTIFIANT', 'RAISON SOCIALE', 'STATUT', 'ETAT'], ';');

    foreach ($listTaxi as $taxi)
    {   
        if($taxi == null){
            $listTaxi[$taxi] = "NULL" ;
        }
        fputcsv(
            $handle,
            [
                $taxi->getNumAm(),
                $taxi->getRaisonSociale(),
                $taxi->getStatutTaxi()->getLibelleStatut(),
                $taxi->getEtatTaxi()->getLibelleEtat()],
            ';'
        );
    }
    fclose($handle);
    echo("nbr taxi : ".count($listTaxi)."\n");
}
}

但是，当我尝试执行“getStatutTaxi()”时，值 return 为空，尽管 if之前.

我的终端给我的错误

[apl4e04@l11750300app2dev 10:23:23] [~/web/html/scot] $ php bin/console ciblage

Lancement de la génération
==========================


Listage des taxis
==================

10:17:16 ERROR     [console] Error thrown while running command "ciblage". Message: "Call to a 
member function getLibelleStatut() on null" ["exception" => Error { …},"command" => 
"ciblage","message" => "Call to a member function getLibelleStatut() on null"]
PHP Fatal error:  Uncaught Symfony\Component\Debug\Exception\FatalThrowableError: Call to a member 
function getLibelleStatut() on null in 
/app/apl4e04/web/html/scot/src/AppBundle/Command/CiblageCommand.php:74
Stack trace:
#0 /app/apl4e04/web/html/scot/src/AppBundle/Command/CiblageCommand.php(44): 
AppBundle\Command\CiblageCommand->create()#1/app/apl4e04/web/html/scot/vendor/
symfony/symfony/src/Symfony/Component/Console/Command/Command.php(255): 
AppBundle\Command\CiblageCommand->execute(Object(Symfony\Component\Console\Input\ArgvInput), 
Object(Symfony\Component\Console\Output\ConsoleOutput))
#2 /app/apl4e04/web/html/scot/vendor/symfony/symfony/src/Symfony/
Component/Console/Application.php(987): Symfony\Component\Console\Command\Command- 
>run(Object(Symfony\Component\Console\Input\ArgvInput), 
Object(Symfony\Component\Console\Output\ConsoleOutput))
#3/app/apl4e04/web/html/scot/vendor/symfony/symfony/
src/Symfony/Bundle/FrameworkBundle/Console/Application 
 .php(86): Symfony\Component\Console\Application->doRunCommand(Object(AppBundl in 
/app/apl4e04/web/html/scot/src/AppBundle/Command/CiblageCommand.php on line 74

我怎样才能解决这个问题并使其正常工作？

在此先感谢您的帮助。亲切地，

Answer 1

我们可以通过在添加到 csv 文件之前检查值实例来解决这个问题。

$statusLibelleStatut = $taxi->getStatutTaxi() instance of StatutTaxi ? $taxi->getStatutTaxi()->getLibelleStatut() : '';
$etatLibelleEtat = $taxi->getEtatTaxi() instance of LibelleEtat ? $taxi->getEtatTaxi()->getLibelleEtat() : '';

fputcsv(
            $handle,
            [
                $taxi->getNumAm(),
                $taxi->getRaisonSociale(),
                $statusLibelleStatut,
                $etatLibelleEtat],
            ';'
        );

Answer 2

更新：我只是在解决问题的“getLibelleStatut()”中添加了一个三元函数。

protected function create()
{
    $repository_taxi = $this->em->getRepository('AppBundle:Taxi');
    $listTaxi = $repository_taxi->findAll();

   //$doctrine = $this->getContainer()->get('doctrine');
    //$em = $doctrine->getEntityManager();

    $handle = fopen('CSVTaxi.csv', 'w+');
    fputcsv($handle, [' IDENTIFIANT', 'RAISON SOCIALE', 'STATUT', 'ETAT'], ';');

    foreach ($listTaxi as $taxi)
    {
        fputcsv(
            $handle,
            [
                $taxi->getNumAm(),
                $taxi->getRaisonSociale(),
                ($taxi->getStatutTaxi()==null)?"":$taxi->getStatutTaxi()->getLibelleStatut(),
                $taxi->getEtatTaxi()->getLibelleEtat()],
            ';'
        );
    }
    fclose($handle);
    echo("nbr taxi : ".count($listTaxi)."\n");
}

命令文件中的可为空值

Nullable value in command file

getter

null

doctrine

repository

symfony