For Medium article "Symfony EasyAdmin: complex forms"

Purchase.php

<?php

/*
 * A lot of stuff is omitted so that we can focus on the point of the article. 
 * The whole working project can be seen here: https://github.com/shonezlo/easy-admin-demo-complex-forms
 */

namespace App\Entity;

use Doctrine\Common\Collections\ArrayCollection;
use App\Model\Shipment;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Table(name="purchase")
 * @ORM\Entity
 */
class Purchase
{

    /**
     * The customer billing address.
     *
     * @var StreetAddress
     * @ORM\Embedded(class="StreetAddress")
     */
    protected $billingAddress;

    /**
     * Constructor of the Purchase class.
     * (Initialize some fields).
     */
    public function __construct()
    {
        $this->billingAddress = new StreetAddress();
    }

    /**
     * Set the address where the customer want its billing.
     *
     * @param StreetAddress $billingAddress
     */
    public function setBillingAddress($billingAddress)
    {
        $this->billingAddress = $billingAddress;
    }

    /**
     * @return StreetAddress
     */
    public function getBillingAddress()
    {
        return $this->billingAddress;
    }

    // Omitted the rest of getters and setter for brevity
}

StreetAddress.php

<?php

namespace App\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Embeddable
 */
class StreetAddress
{

    /**
     * @var string
     * @ORM\Column
     */
    private $line1;

    /**
     * @var string
     * @ORM\Column(nullable=true)
     */
    private $line2;

    /**
     * @var string
     * @ORM\Column
     */
    private $postCode;

    /**
     * @var string
     * @ORM\Column
     */
    private $city;

    /**
     * @var string
     * @ORM\Column(length=2)
     */
    private $country;
    
    /**
     * EasyAdmin uses __toString by default when showing stuff on list page.
     *
     * @return string
     */
    public function __toString()
    {
        return $this->line1 . ($this->line2 ? ' ' : '') . $this->line2
                . ' ' . $this->postCode . ' ' . $this->city
                . ', ' . $this->country;
    }
  
    // Getters and setters omitted
}