symfony2 doctrine exception insert - php

Question

In symfony2 when I insert data into to database I receive an exception:
An exception occurred while executing 'INSERT INTO practice_user (user_id, practice_id, practice_text, type_id) VALUES (?, ?, ?, ?)' with params [null, "1", "test", 2]:
SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'user_id' cannot be null
PracticeUser.php:
<?php
namespace fl\PracticeBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
/**
* #ORM\Entity
* #ORM\Table(name="practice_user")
*/
class PracticeUser
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $submit_practice_id;
/**
* #ORM\Column(type="integer")
*/
protected $user_id;
/**
* #ORM\Column(type="integer")
*/
protected $practice_id;
/**
* #ORM\Column(type="text")
*/
protected $practice_text;
/**
* #ORM\Column(type="integer")
*/
protected $type_id;
//many-to-one fos_user
/**
* #ORM\ManyToOne(targetEntity="fl\UserBundle\Entity\User", inversedBy="practices")
* #ORM\JoinColumn(name="user_id", referencedColumnName="id", onDelete="CASCADE", nullable=false))
*/
protected $user;
/**
* Get submit_practice_id
*
* #return integer
*/
public function getSubmitPracticeId()
{
return $this->submit_practice_id;
}
/**
* Set user_id
*
* #param integer $userId
* #return PracticeUser
*/
public function setUserId($userId)
{
$this->user_id = $userId;
return $this;
}
/**
* Get user_id
*
* #return integer
*/
public function getUserId()
{
return $this->user_id;
}
/**
* Set practice_id
*
* #param integer $practiceId
* #return PracticeUser
*/
public function setPracticeId($practiceId)
{
$this->practice_id = $practiceId;
return $this;
}
/**
* Get practice_id
*
* #return integer
*/
public function getPracticeId()
{
return $this->practice_id;
}
/**
* Set practice_text
*
* #param string $practiceText
* #return PracticeUser
*/
public function setPracticeText($practiceText)
{
$this->practice_text = $practiceText;
return $this;
}
/**
* Get practice_text
*
* #return string
*/
public function getPracticeText()
{
return $this->practice_text;
}
/**
* Set type_id
*
* #param integer $typeId
* #return PracticeUser
*/
public function setTypeId($typeId)
{
$this->type_id = $typeId;
return $this;
}
/**
* Get type_id
*
* #return integer
*/
public function getTypeId()
{
return $this->type_id;
}
/**
* Set user
*
* #param \fl\UserBundle\Entity\User $user
* #return PracticeUser
*/
public function setUser(\fl\UserBundle\Entity\User $user)
{
$this->user = $user;
return $this;
}
/**
* Get user
*
* #return \fl\UserBundle\Entity\User
*/
public function getUser()
{
return $this->user;
}
}
User.php
<?php
namespace fl\UserBundle\Entity;
use FOS\UserBundle\Entity\User as BaseUser;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
/**
* #ORM\Entity
* #ORM\Table(name="fos_user")
*/
class User extends BaseUser
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
//one-to-one user_detail
/**
* #ORM\OneToOne(targetEntity="fl\UserBundle\Entity\UserDetail", mappedBy="user")
*/
protected $user_detail;
//one-to-one account
/**
* #ORM\OneToOne(targetEntity="fl\UserBundle\Entity\Account", mappedBy="user")
*/
protected $account;
//one-to-many language_user
/**
* #ORM\OneToMany(targetEntity="fl\UserBundle\Entity\LanguageUser", mappedBy="user")
*/
protected $languageusers;
//one-to-many practice_user
/**
* #ORM\OneToMany(targetEntity="fl\PracticeBundle\Entity\PracticeUser", mappedBy="user")
*/
protected $practices;
//one-to-many practice_review
/**
* #ORM\OneToMany(targetEntity="fl\PracticeBundle\Entity\PracticeReview", mappedBy="user")
*/
protected $reviews;
public function __construct()
{
parent::__construct();
// your own logic
//one to many with language_user table
$this->languageusers = new ArrayCollection();
//one-to-many practice_user
$this->practices = new ArrayCollection();
//one-to-many practice_review
$this->reviews = new ArrayCollection();
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set user_detail
*
* #param \fl\UserBundle\Entity\UserDetail $userDetail
* #return User
*/
public function setUserDetail(\fl\UserBundle\Entity\UserDetail $userDetail = null)
{
$this->user_detail = $userDetail;
return $this;
}
/**
* Get user_detail
*
* #return \fl\UserBundle\Entity\UserDetail
*/
public function getUserDetail()
{
return $this->user_detail;
}
/**
* Set account
*
* #param \fl\UserBundle\Entity\Account $account
* #return User
*/
public function setAccount(\fl\UserBundle\Entity\Account $account = null)
{
$this->account = $account;
return $this;
}
/**
* Get account
*
* #return \fl\UserBundle\Entity\Account
*/
public function getAccount()
{
return $this->account;
}
/**
* Add languageusers
*
* #param \fl\UserBundle\Entity\LanguageUser $languageusers
* #return User
*/
public function addLanguageuser(\fl\UserBundle\Entity\LanguageUser $languageusers)
{
$this->languageusers[] = $languageusers;
return $this;
}
/**
* Remove languageusers
*
* #param \fl\UserBundle\Entity\LanguageUser $languageusers
*/
public function removeLanguageuser(\fl\UserBundle\Entity\LanguageUser $languageusers)
{
$this->languageusers->removeElement($languageusers);
}
/**
* Get languageusers
*
* #return \Doctrine\Common\Collections\Collection
*/
public function getLanguageusers()
{
return $this->languageusers;
}
/**
* Add practices
*
* #param \fl\PracticeBundle\Entity\PracticeUser $practices
* #return User
*/
public function addPractice(\fl\PracticeBundle\Entity\PracticeUser $practices)
{
$this->practices[] = $practices;
return $this;
}
/**
* Remove practices
*
* #param \fl\PracticeBundle\Entity\PracticeUser $practices
*/
public function removePractice(\fl\PracticeBundle\Entity\PracticeUser $practices)
{
$this->practices->removeElement($practices);
}
/**
* Get practices
*
* #return \Doctrine\Common\Collections\Collection
*/
public function getPractices()
{
return $this->practices;
}
/**
* Add reviews
*
* #param \fl\PracticeBundle\Entity\PracticeReview $reviews
* #return User
*/
public function addReview(\fl\PracticeBundle\Entity\PracticeReview $reviews)
{
$this->reviews[] = $reviews;
return $this;
}
/**
* Remove reviews
*
* #param \fl\PracticeBundle\Entity\PracticeReview $reviews
*/
public function removeReview(\fl\PracticeBundle\Entity\PracticeReview $reviews)
{
$this->reviews->removeElement($reviews);
}
/**
* Get reviews
*
* #return \Doctrine\Common\Collections\Collection
*/
public function getReviews()
{
return $this->reviews;
}
}
code when I try insert to the DataBase:
$user_id = $user->getId();
$submit_dictation = new PracticeUser();
$submit_dictation->setUserId($user_id);
$submit_dictation->setPracticeId($dictation_id);
$submit_dictation->setPracticeText($get_user_answer);
$submit_dictation->setTypeId(self::PRACTICE_DICTATION);
$em = $this->getDoctrine()->getManager();
$em->persist($submit_dictation);
$em->flush();
I also checked(with var_dump)the variable $user_id but is not null, I receive the user id.
Thanks in advance

Answer 1

You don't need $user_id, as FuzzyTree told you, but you need to fill the $user attribute by adding $submit_dictation->setUser($user) instead of $submit_dictation->setUserId($user->getId()) when you insert in the database.
This is why, among other things, Doctrine is useful, you don't need to understant how relations work : you don't need to give an id but just the entity itself.