Doctrine2 move immutable fields into separate class

Question

I need move some immutable fields into separate class, but I don't really want to use "join", because I need all data together every time.

Is any way to have some entity attributes as classes that mapped into same table?

Something like:

/**
 * @ORM\Entity
 */
class User {
    /**
     * @var int
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;
    ...

    /**
     * @var Address
     * @ORM\... ??
     */
    protected $address
}

/**
 * @ORM\ValueObject ??
 */
class Address {
    /**
     * @var string
     * @ORM\Column(type="string", name="address_zipcode", length=12)
     */
    protected $zipcode;

    /**
     * @var string
     * @ORM\Column(type="string", name="address_country_iso", length=3)
     */
    protected $countryIso;
    ...
}

And table structure would be:

CREATE TABLE User (
    `id` INT(11) NOT NULL auto_increment,
    `address_zipcode` VARCHAR(12) NOT NULL,
    `address_country_iso` VARCHAR(3) NOT NULL,
    PRIMARY KEY (`id`)
);

Answer 1

What you're asking about is called Value Objects.

There was an open issue in there Jira DDC-93 to add support. It's current marked as Resolved in version 2.5, which was just released in Beta.