ZF2 Annotation Validators NotEmpty and Int not working? - forms

Question

I'm building a form in ZF2 from an entity and everything seems to work fine, except 2 of my validators are ignored for some reason. The Entity looks like this:
/**
* #var string $name
*
* #ORM\Column(name="name", type="string", length=255, nullable=true)
* #Annotation\Attributes({"type":"text"})
* #Annotation\Validator({"name":"NotEmpty"}) // duplicate
* #Annotation\Options({"label":"Name:"})
*/
private $name;
/**
* #var integer $sort
*
* #ORM\Column(name="sort", type="integer")
* #Annotation\Attributes({"type":"text"})
* #Annotation\Validator({"name":"Int"})
* #Annotation\Validator({"name":"NotEmpty"})
* #Annotation\Options({"label":"Sort:"})
*/
private $sort;
Yet I can submit the form without any values. I can enter a string in the SORT input, I can leave both fields empty. Why is this not working, why is there no errormessage when I leave the fields empty?

Answer 1

okay, it's partially because I'm STUPID.
Problem 1: notempty not working is because I defined nullable as true. Seems to override the "notempty" validator. duh.
Problem 2: I still don't know WHY that works, but if I declare the column type as string (instead of integer), suddenly the int validation works.
So here's the right code:
/**
* #var string $name
*
* #ORM\Column(name="name", type="string", length=255)
* #Annotation\Attributes({"type":"text"})
* #Annotation\Validator({"name":"NotEmpty"})
* #Annotation\Options({"label":"Name:"})
*/
private $name;
/**
* #var integer $sort
*
* #ORM\Column(name="sort", type="string")
* #Annotation\Attributes({"type":"text"})
* #Annotation\Validator({"name":"Int"})
* #Annotation\Validator({"name":"NotEmpty"})
* #Annotation\Options({"label":"Sort:"})
*/
private $sort;