RenderView in Symfony Command usage

Question

How can I use $this->renderView inside a symfony Command (not inside a controller)? I new about the function \"renderView\" but what do I have to setup to use it wihtin a comman

Answer 1

In Symfony 4 I could not get $this->getContainer()->get('templating')->render($view, $parameters); to work.

I set the namespace use for Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand and extended ContainerAwareCommand class EmailCommand extends ContainerAwareCommand

I get an exception thrown

[Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException]
      You have requested a non-existent service "templating".

For Symfony 4, this is the solution I came up with.

First I installed Twig.

composer require twig

Then created my own twig service.

<?php

# src/Service/Twig.php

namespace App\Service;

use Symfony\Component\HttpKernel\KernelInterface;

class Twig extends \Twig_Environment {

    public function __construct(KernelInterface $kernel) {
        $loader = new \Twig_Loader_Filesystem($kernel->getProjectDir());

        parent::__construct($loader);
    }
}

Now my email command looks like this.

<?php

# src/Command/EmailCommand.php

namespace App\Command;

use Symfony\Component\Console\Command\Command,
    Symfony\Component\Console\Input\InputInterface,
    Symfony\Component\Console\Output\OutputInterface,
    App\Service\Twig;

class EmailCommand extends Command {

    protected static $defaultName = 'mybot:email';

    private $mailer,
            $twig;

    public function __construct(\Swift_Mailer $mailer, Twig $twig) {
        $this->mailer = $mailer;
        $this->twig = $twig;

        parent::__construct();
    }

    protected function configure() {
        $this->setDescription('Email bot.');
    }

    protected function execute(InputInterface $input, OutputInterface $output) {

        $template = $this->twig->load('templates/email.html.twig');

        $message = (new \Swift_Message('Hello Email'))
            ->setFrom('emailbot@domain.com')
            ->setTo('someone@somewhere.com')
            ->setBody(
                $template->render(['name' => 'Fabien']),
                'text/html'
            );

        $this->mailer->send($message);
    }
}

Answer 2

Yet another one: rely on dependency injection, i.e. inject ContainerInterface

namespace AppBundle\Command;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Psr\Container\ContainerInterface;

class SampleCommand extends Command
{
    public function __construct(ContainerInterface $container)
    {
        $this->templating = $container->get('templating');
        parent::__construct();
    }

    protected function configure()
    {
        $this->setName('app:my-command')
             ->setDescription('Do my command using render');
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $data = retrieveSomeData();
        $csv = $this->templating->render('path/to/sample.csv.twig',
                                         array('data' => $data));
        $output->write($csv);
    }

    private $templating;
}

This relies on Symfony to inject the container, which in turn is used to retrieve either templating or twig or whatever you need for your custom command.

Answer 3

Your command class must extends the ContainerAwareCommand abstract class and then you can do:

$this->getContainer()->get('templating')->render($view, $parameters);

When it comes to commands that extend ContainerAwareCommand the proper way to obtain the container is by getContainer() unlike in controller shortcut.