Using association in @Embedded entity

Question

I have problem with doctrine embeddables and using associations in it. When i add @ManyToOne to embedded entity doctrine don't create address_city column in user table, however address_street column is created. I seams bit strange because there is no error, city is silently ommited.

Code look like this:

/** @Entity */
class User
{
    /** @Embedded(class = "Address") */
    private $address;
}

/** @Embeddable */
class Address
{
    /** @Column(type = "string") */
    private $street;

    /** @ManyToOne(targetEntity = "City") */
    private $city;
}

/** @Entity */
class City
{
    /** @Column(type = "string") */
    private $name;
}

Answer 1

State for 2015.01.11:

This case is currently not supported in doctrine. It's now described in doctrine issue tracker here

Here is the explanation:

We don't support associations from embeddables right now...

It will probably not implemented for now, as embeddables (in our vision) are fitting the use-case of ValueObjects. ValueObjects are (usually) supposed to be containing serializable data, and an entity reference is not serializable data.