Serializing Entity Relation only to Id with JMS Serializer

Question

I\'m trying to serialize a entity relation with JMS Serializer.

Here is the Entity:

class Ad
{ 

    /**
     * @Type(\"string\")
     * @Groups({\"manag         


        

Answer 1

The author wants to keep the property name, which doesn't apply to the accepted answer. As far as I understood, the answer by ScayTrase would keep the original property name but has another disadvantage according to the comments: The related object will be fetched if you are using Doctrine ORM @ManyToOne, thus decreasing performance.

If you want to keep the original property name, you have to define the @VirtualProperty at class level and @Exclude the original property. Otherwise, the serialized property name will be derived from the getter method (countryId in this case):

/**
 * @Serializer\VirtualProperty(
 *     "country",
 *     exp="object.getCountryId()",
 *     options={@Serializer\SerializedName("country")}
 * )
 */
class Ad {
    /**
     * @Serializer\Exclude
     */
    private $country;

    public function getCountryId() {
        return $this->country === null ? null : $this->country->getId();
    }
}