[Semantical Error] The annotation "@Symfony\Component\Validator\Tests\Constraints\NotBlank" in property Blog\ModelBundle\Entity\Post::$title does not exist, or could not be auto-loaded.

[ghost]

On this module:

<?php

namespace Blog\ModelBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Tests\Constraints as Assert;

/**
 * Post
 *
 * @ORM\Table()
 * @ORM\Entity
 */
class Post extends Timestampable
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="title", type="string", length=150)
     * @Assert\NotBlank
     */
    private $title;

    /**
     * @var string
     *
     * @ORM\Column(name="body", type="text")
     * @Assert\NotBlank
     */
    private $body;

    /**
     * @var Author
     *
     * @ORM\ManyToOne(targetEntity="Author", inversedBy="posts")
     * @ORM\JoinColumn(name="author_id", referencedColumnName="id", nullable=false)
     * @Assert\NotBlank
     */
    private $author;

    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set title
     *
     * @param string $title
     * @return Post
     */
    public function setTitle($title)
    {
        $this->title = $title;

        return $this;
    }

    /**
     * Get title
     *
     * @return string
     */
    public function getTitle()
    {
        return $this->title;
    }

    /**
     * Set body
     *
     * @param string $body
     * @return Post
     */
    public function setBody($body)
    {
        $this->body = $body;

        return $this;
    }

    /**
     * Get body
     *
     * @return string
     */
    public function getBody()
    {
        return $this->body;
    }
}

I'm having this error when i try to update the schema:
php app/console doctrine:schema:update --force

------------------- Error ------------------
[Doctrine\Common\Annotations\AnnotationException]                                                                                                    
  [Semantical Error] The annotation "@Symfony\Component\Validator\Tests\Constraints\NotBlank" in property Blog\ModelBundle\Entity\Post::$title does n  
  ot exist, or could not be auto-loaded. 

Thank you in advance.

[jzawadzki]

You use wrong import (you have linked to tests not to actual code):
type

use Symfony\Component\Validator\Constraints as Assert;

instead of

use Symfony\Component\Validator\Tests\Constraints as Assert;

[ghost]

Thank You jzawadzki.