<?php
/**
 * Created by PhpStorm.
 * User: bombe
 * Date: 21.01.2018
 * Time: 10:32
 */

class Customer
{
    /**
     * @var int
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     * @ORM\Column(type="string")
     */
    private $firstName;

    /**
     * @var CartProduct[]|Collection
     * @ORM\OneToMany(targetEntity="CartProduct", mappedBy="customer")
     */
    private $cartProducts;
}

class CartProduct
{
    /**
     * @var int
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var \DateTime
     * @ORM\Column(type="datetime")
     */
    private $addedAt;

    /**
     * @var Product
     * @ORM\ManyToOne(targetEntity="Product")
     */
    private $product;

    /**
     * @var Customer
     * @ORM\ManyToOne(targetEntity="Customer", inversedBy="cartProducts")
     */
    private $customer;
}

class Product
{
    /**
     * @var int
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     * @ORM\Column(type="string")
     */
    private $name;
}