How to exclude fields from the associated objects?

[isqad]

I have a comment Entity with user field:

//...
/**
 * @ORM\ManyToOne(targetEntity="User")
 * @ORM\JoinColumn(name="user_id", referencedColumnName="id", onDelete="CASCADE")
 */
protected $user;
//...

I need to serialize the object comment that in the user field can be only certain fields by me. For example, I would like to delete the password field. How to do it, tell me? I did not find in the documentation.

[schmittjoh]

Please ask usage questions on the mailing list. Thanks.