How to load fixtures in Symfony?

@orpha 

To load fixtures in Symfony, you can follow these steps:

1. Install the DoctrineFixturesBundle:

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composer require --dev doctrine/doctrine-fixtures-bundle

1. Create your fixture class in the src/DataFixtures directory. For example, you can create a class called UserFixtures.
2. In the UserFixtures class, implement the FixtureInterface and define the load() method. In the load() method, you can use the Doctrine entity manager to persist entities to the database. Here's an example:

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use AppEntityUser;
use DoctrineBundleFixturesBundleFixture;
use DoctrinePersistenceObjectManager;

class UserFixtures extends Fixture
{
    public function load(ObjectManager $manager)
    {
        $user = new User();
        $user->setUsername('john');
        $user->setPassword('password');
        $manager->persist($user);

        $manager->flush();
    }
}

1. Load the fixtures using the command:

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php bin/console doctrine:fixtures:load

This command will load all the fixtures in the src/DataFixtures directory. You can also specify a specific fixture class or group using the --fixtures and --group options.

That's it! Your fixtures should now be loaded into the database.