How to use Doctrine ORM with Symfony?

To use Doctrine ORM with Symfony, follow these steps:

Install Doctrine ORM package by running the following command in your Symfony project directory:

composer require doctrine

Configure Doctrine ORM in your Symfony project by updating the config/packages/doctrine.yaml file. Here is an example configuration:

doctrine:
    dbal:
        driver: 'pdo_sqlite'
        url: '%env(resolve:DATABASE_URL)%'
        charset: UTF8

    orm:
        auto_generate_proxy_classes: true
        naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
        auto_mapping: true

Create your entity classes in the src/Entity directory of your Symfony project. These classes represent your database tables and define the structure of your data.
Run the following command to generate the database schema based on your entity classes:

php bin/console doctrine:schema:update --force

This command will create the necessary database tables based on your entity classes.

To interact with the database using Doctrine ORM, you can use the Doctrine EntityManager in your Symfony controllers or services. Here is an example of how you can use the EntityManager to retrieve data from the database:

$entityManager = $this->getDoctrine()->getManager();
$users = $entityManager->getRepository(User::class)->findAll();

This code snippet retrieves all user records from the database and stores them in the $users variable.

By following these steps, you can use Doctrine ORM with Symfony to interact with your database and manage your data effectively.