Symfony - Validate entity differently in INSERT, UPDATE or DELETE - doctrine-orm

Question

I want validate an entity doctrine differently when the entity is created, updated or deleted.
There is an entity constraint validator in my entity class.
// src/AppBundle/Entity/AcmeEntity.php
use AppBundle\Validator\Constraints as AcmeAssert;
/**
* #AcmeAssert\CustomConstraint
*/
class AcmeEntity
{
// ...
protected $name;
// ...
}
In my CustomConstraint I want determine if the Entity will be updated, created or delete for execute a specific validator.
Using unit of work is a solution ?
What is the best way to make this?
I think this problematic is common in lot of application ?
Thank's all ;)

Answer 1

You could either use validation groups based on the submitted data or handle itwhen you create the form by passing the validation group.
For example, in your controller when you create the form;
$form = $this->createForm(new AcmeType(), $acme, ['validation_groups' => ['create']]);
Then you entity would be something like;
/**
* Get name
*
* #Assert\Length(min=2, max=11, groups={"create", "update"})
* #AcmeAssert\ContainsAlphanumeric(groups={"create"}) // only applied when create group is passed
* #return string
*/
public function getName()
{
return $this->name;
}

Answer 2

This is what validation groups are made for.
Since Symfony Forms read validations from entity annotations and use internally the Validator component you'd have a look at these articles in the documentation:
http://symfony.com/doc/current/form/validation_groups.html
http://symfony.com/doc/current/validation/groups.html
http://symfony.com/doc/current/validation/sequence_provider.html