使用原则 2 转储数据库数据

对于 Symfony2：

类型

php app/console doctrine:schema:create --dump-sql

在命令行中

这是一个旧的线程，但我只是在Symfony中做了类似的事情，并决定为它开发一个实际的命令。这更像是一种 Symfony 的方式，可以让你更好地控制输出，并允许您访问参数，所以你不必使用 bash 脚本来解析 Yaml :)

namespace Fancy\Command;

use Fancy\Command\AbstractCommand;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Filesystem\Filesystem;
use Symfony\Component\Filesystem\Exception\IOExceptionInterface;

class DatabaseDumpCommand extends AbstractCommand
{

    /** @var OutputInterface */
    private $output;

    /** @var InputInterface */
    private $input;


    private $database;
    private $username;
    private $password;
    private $path;

    /** filesystem utility */
    private $fs;

    protected function configure()
    {
        $this->setName('fancy-pants:database:dump')
            ->setDescription('Dump database.')
            ->addArgument('file', InputArgument::REQUIRED, 'Absolute path for the file you need to dump database to.');
    }

    /**
     * @param InputInterface $input
     * @param OutputInterface $output
     * @return int|null|void
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $this->output = $output;
        $this->database = $this->getContainer()->getParameter('database_name') ; 
        $this->username = $this->getContainer()->getParameter('database_user') ; 
        $this->password = $this->getContainer()->getParameter('database_password') ; 
        $this->path = $input->getArgument('file') ; 
        $this->fs = new Filesystem() ; 
        $this->output->writeln(sprintf('<comment>Dumping <fg=green>%s</fg=green> to <fg=green>%s</fg=green> </comment>', $this->database, $this->path ));
        $this->createDirectoryIfRequired();
        $this->dumpDatabase();
        $output->writeln('<comment>All done.</comment>');
    }

    private function createDirectoryIfRequired() {
        if (! $this->fs->exists($this->path)){
            $this->fs->mkdir(dirname($this->path));
        }
    }

    private function dumpDatabase()
    {
        $cmd = sprintf('mysqldump -B %s -u %s --password=%s' // > %s'
            , $this->database
            , $this->username
            , $this->password
        );

        $result = $this->runCommand($cmd);

        if($result['exit_status'] > 0) {
            throw new \Exception('Could not dump database: ' . var_export($result['output'], true));
        }

        $this->fs->dumpFile($this->path, $result); 
    }

    /**
     * Runs a system command, returns the output, what more do you NEED?
     *
     * @param $command
     * @param $streamOutput
     * @param $outputInterface mixed
     * @return array
     */
    protected function runCommand($command)
    {
        $command .=" >&1";
        exec($command, $output, $exit_status);
        return array(
              "output"      => $output
            , "exit_status" => $exit_status
        );
    }
}

而 AbstractCommand 只是一个扩展 symfony 的 ContainerAwareCommand 的类：

namespace Fancy\Command;

use Symfony\Component\HttpFoundation\Request;

use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

abstract class AbstractCommand extends ContainerAwareCommand
{
}