migrations/Command/CreateYamlForImportCommand.php

<?php

namespace MigrationsBundle\Command;

use ClientBundle\Entity\Client;
use MapBundle\Entity\Location;
use MapBundle\Util\GeoDecode;
use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class CreateYamlForImportCommand extends ContainerAwareCommand
{
    protected function configure()
    {
        $this
            ->setName('migrate:create:import')
            ->setAliases(array("ik:mg:import"))
            ->setDescription('Create yaml for import.')
            ->setHelp('Create yaml from table.')
            ->addArgument('table', InputArgument::REQUIRED, "Table name to export data.")
            ->addArgument('file-name', InputArgument::REQUIRED, "Name of the file.");
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $em = $this->getContainer()->get('doctrine')->getManager();
        $table = $input->getArgument('table');
        $fileName = $input->getArgument('file-name');

        $stmt = $em->getConnection()->executeQuery("select * from " . $table);
        if ($stmt->rowCount() > 0) {
            $result = $stmt->fetchAll();
            $str = "insertorupdate:\n";
            $str .= "  $table:\n";
            foreach ($result as $row) {
                $first = true;
                foreach ($row as $key => $value) {
                    $value = str_replace("\\", '\\\\', $value);
                    $value = str_replace('"', '\"', $value);
                    $value = str_replace(array("\n", "\r"), array("\\n", "\\r"), $value);
                    if (trim($value) == "") {
                        // al estar vacio el string, tengo que verificar si el valor es null
                        if (isset($row['id'])) {
                            // existe la columna id para utilizar en el where
                            $stmtNull = $em->getConnection()->executeQuery("select if(isnull(" . $key . "), 1, 0) as valor from " . $table . " where id = " . $row['id']);
                            if ($stmtNull->rowCount() > 0) {
                                $resultNull = $stmtNull->fetchAll();
                                $value = $resultNull[0]['valor'] == 1 ? "NULL" : "";
                            }
                        }
                    }
                    if ($first) {
                        $str .= "    - $key: \"" . $value . "\"\n";
                        $first = false;
                    } else {
                        $str .= "      $key: \"" . $value . "\"\n";
                    }
                }
            }
            file_put_contents($fileName, $str);
        } else {
            echo "No results";
        }
    }
}