Can I access discriminator field from php in doctrine2?

php inheritance doctrine doctrine-orm
Greg picture Greg · Dec 15, 2010 · Viewed 17.9k times · Source

I have an entity which defines inheritance like this:

* @DiscriminatorColumn(name="type", type="string")
* @DiscriminatorMap({"text" = "TextAttribute", "boolean" = "BooleanAttribute", "numeric" = "NumericAttribute", "date" = "DateAttribute"})

I am wondering is it possible to have getter for field 'type'? I know I can use instanceof (and in most cases this is what I'm doing) but there are few scenarios where $item->getType() would make my life so much easier.

Answer

xPheRe picture xPheRe · Dec 27, 2010

Extending what beberlei said, you could declare some constants in the Attribute class, and an abstract getType() function. Then, overload it in every derived attribute class.

Something like:

abstract class Attribute {
    const TYPE_BOOL = 0;
    const TYPE_INT  = 1;
    ...
    abstract public function getType();
}

class BooleanAttribute extends Attribute {
    public function getType() {
        return parent::TYPE_BOOL;
    }
}

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