Since Version 2.0.0 the Phalcon\Validation\Validator\PresenceOf Validator returns failure if the Value is "0".
$validator->add('activities', new PresenceOfValidator());
I have an Input field where the Customer writes the Number of Activities for an Entity. It is possible to have 0 activities for the Entity.
With Version 1.3.4 everything works fine. But since Version 2.0.0 the validator fails if i enter 0 activities.
Seems for me like it's a bug