Primary key of owning side as a join column

Question

NOTE: Topic is lengthy but detailed and may come in handy if you use Doctrine2 and oneToOne relationships.

Recently I came across a problem in Doctrine:

Answer 1

My workaround was to turn the OneToOne relationship into a ManyToOne (with an associated ArrayCollection), with a custom getter and setter which only sets and returns the 0-th element of the collection:

/**
 * Set pref
 *
 * @param \MyBundle\Entity\Pref $pref
 * @return Employee
 */
public function setPref(\MyBundle\Entity\Pref $pref = null) {
    $this->pref[0] = $pref;

    return $this;
}

/**
 * Get pref
 *
 * @return \MyBundle\Entity\Pref 
 */
public function getPref() {
    return $this->pref[0];
}

These methods can (seemingly) be used the same as the ones created by a OneToOne relationship.

doctrine:generate:entities still creates the normal "add" and "remove" methods, but they can be ignored.

Note: I only recently started using these and currently only to read from the database. I don't know of any side effects from this workaround. I'll update this answer if I notice any.

This is admittedly an ugly hack. I hope Doctrine fixes this soon so I can go back to using proper OneToOne relationships.