सिद्धांत 2:डेटा खोए बिना एक से कई को कई से कई में कैसे परिवर्तित करें

ठीक है, मुझे वास्तव में सिद्धांत प्रवासन का उपयोग करने का एक तरीका मिल गया है।

मैंने पहले यह सुनिश्चित किया कि मेरे परिवर्तन जहां सही ढंग से एक सिद्धांत का उपयोग करके सेट किए गए हैं:स्कीमा:अपडेट --फोर्स, प्रोफाइलर की जांच करना, और फिर अंतिम डेटाबेस पर वापस लौटना।

तो सिद्धांत माइग्रेशन बंडल का उपयोग करना:

doctrine:migrations:diff

एक नया माइग्रेशन क्लास बनाता है

अपनी आवश्यकताओं के अनुरूप कक्षा संपादित करें। मेरा था:

<?php

namespace Application\Migrations;

use AppBundle\Entity\Core\Media;
use AppBundle\Entity\FoodAnalytics\Recipe;
use Doctrine\DBAL\Migrations\AbstractMigration;
use Doctrine\DBAL\Schema\Schema;
use Symfony\Component\DependencyInjection\Container;
use Symfony\Component\DependencyInjection\ContainerAwareInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Auto-generated Migration: Please modify to your needs!
 */
class Version20150525154902 extends AbstractMigration implements ContainerAwareInterface
{

    private $customSQL = array();

    /** @var Container */
    private $container;


    public function setContainer(ContainerInterface $container = null)
    {
        $this->container = $container;
    }

    /**
     * @param Schema $schema
     */
    public function preUp(Schema $schema)
    {
        $query = "SELECT id as mediaId, recipeId FROM `media` WHERE recipeId IS NOT NULL";
        $data = $this->connection->prepare($query);
        $data->execute();
        foreach ($data as $row)
        {
            $mediaId = $row['mediaId'];
            $recipeId = $row['recipeId'];
            $this->customSQL[] = "($mediaId, $recipeId)";
        }

    }

    /**
     * @param Schema $schema
     */
    public function up(Schema $schema)
    {
        // this up() migration is auto-generated, please modify it to your needs
        $this->abortIf($this->connection->getDatabasePlatform()->getName() != 'mysql', 'Migration can only be executed safely on \'mysql\'.');

        $this->addSql('CREATE TABLE media_recipes (mediaId INT UNSIGNED NOT NULL, recipeId INT UNSIGNED NOT NULL, INDEX IDX_C2BE64FC27D9F5AC (mediaId), INDEX IDX_C2BE64FC6DCBA54 (recipeId), PRIMARY KEY(mediaId, recipeId)) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = InnoDB');
        $this->addSql('ALTER TABLE media_recipes ADD CONSTRAINT FK_C2BE64FC27D9F5AC FOREIGN KEY (mediaId) REFERENCES media (id) ON DELETE CASCADE');
        $this->addSql('ALTER TABLE media_recipes ADD CONSTRAINT FK_C2BE64FC6DCBA54 FOREIGN KEY (recipeId) REFERENCES Recipe (id) ON DELETE CASCADE');
        $this->addSql('ALTER TABLE media DROP FOREIGN KEY FK_6A2CA10C6DCBA54');
        $this->addSql('DROP INDEX IDX_6A2CA10C6DCBA54 ON media');
        $this->addSql('ALTER TABLE media DROP recipeId');
        $this->addSql('ALTER TABLE recipe ADD versionDetails VARCHAR(200) DEFAULT NULL');

    }

    public function postUp(Schema $schema)
    {
        $SQL = 'INSERT INTO media_recipes (mediaId, recipeId) VALUES ' . implode(', ', $this->customSQL);

        $this->connection->executeQuery($SQL);
    }



    /**
     * @param Schema $schema
     */
    public function down(Schema $schema)
    {
        // this down() migration is auto-generated, please modify it to your needs
        $this->abortIf($this->connection->getDatabasePlatform()->getName() != 'mysql', 'Migration can only be executed safely on \'mysql\'.');

        $this->addSql('DROP TABLE media_recipes');
        $this->addSql('ALTER TABLE media ADD recipeId INT UNSIGNED DEFAULT NULL');
        $this->addSql('ALTER TABLE media ADD CONSTRAINT FK_6A2CA10C6DCBA54 FOREIGN KEY (recipeId) REFERENCES recipe (id) ON DELETE CASCADE');
        $this->addSql('CREATE INDEX IDX_6A2CA10C6DCBA54 ON media (recipeId)');
    }
}

फिर अपडेट करें:

doctrine:migrations:migrate

और पुष्टि करें y