Symfony中支持多个数据库

doctrine:
  dbal:
    default_connection: default
    connections:
      default:
        url: '%env(resolve:DATABASE_URL)%'
        driver: 'pdo_mysql'
        server_version: '5.7'
        charset: utf8mb4
      customer:
        url: '%env(resolve:CUSTOMER_DATABASE_URL)%'
        driver: 'pdo_pgsql'
        server_version: '11'
        charset: utf8

// src/Entity/User.php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\Table(name="user", connection="default")
 */
class User
{
    // ...
}

// src/Entity/Customer.php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\Table(name="customer", connection="customer")
 */
class Customer
{
    // ...
}