Serialization error in entity with UserInterface

[szal1k]

Hi,
I was added "avatar" field to my sample "User" entity with UserInterface and standard PasswordAuthenticatedUserInterface. After upload file i get an error from "Rekalogika\File\File" function "__serialize":

"Serialization is not supported. Use getPointer() to get a pointer to this file and serialize it instead."

The solution is add custom serialization to User entity (without "avatar" FileInterface field) as:
`
class User implements UserInterface, PasswordAuthenticatedUserInterface, PersistenceSubjectInterface, \Serializable
{
...
public function serialize()
{
return serialize(array(
'id' => $this->id,
'email' => $this->email,
'password' => $this->password,
'roles' => $this->roles,
));
}

public function unserialize(string $data)
{
    $unserialized = unserialize($data);

    $this->id = $unserialized['id'];
    $this->email = $unserialized['email'];
    $this->password = $unserialized['password'];
    $this->roles = $unserialized['roles'];
}

}
`

It is good solution? Do you have any other ideas to resolve the problem?

[priyadi]

To me, that's still absolutely necessary even without rekalogika/file. Without __serialize & __unserialize, Symfony will serialize the complete User entity, along with its entire related entities, to the session, even though the authentication layer only needs the id, and it will refresh the entity from the database anyway.

This is not specific to rekalogika/file, but applies to all cases where something prevents User from being serialized, including other file upload frameworks. But probably a good idea to add to our docs. Thanks.