Symfony2 forms collection - php

Question

I have, two entities, Topic and TopicContent are relation by topic_id.
topic_id in topic table is autoincremet , in topic_content it's not autoincrement.
Because, i need to get topic_id from Topic entity when query it's ok, and then insert data in topic_content table. Help me please, how to do this in symfony with orm. thanks.
TopicContent
namespace Socialist\ClubBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
* #ORM\Table(name="topic_content")
*/
class TopicContent
{
/**
*
* #ORM\Column(name="topic_id", type="integer")
* #ORM\Id
*
*/
protected $topic_id;
/**
*
* #ORM\Column(name="topic_text", type="text", nullable=false)
*/
protected $topic_text;
/**
* #ORM\OneToOne(targetEntity="Topic", inversedBy="topicContent", cascade={"persist", "remove"})
* #ORM\JoinColumn(name="topic_id", referencedColumnName="topic_id", onDelete="CASCADE")
*/
private $topic;
/**
* Set topic_id
*
* #param integer $topicId
* #return TopicContent
*/
public function setTopicId($topicId)
{
$this->topic_id = $topicId;
return $this;
}
/**
* Get topic_id
*
* #return integer
*/
public function getTopicId()
{
return $this->topic_id;
}
/**
* Set topic_text
*
* #param string $topicText
* #return TopicContent
*/
public function setTopicText($topicText)
{
$this->topic_text = $topicText;
return $this;
}
/**
* Get topic_text
*
* #return string
*/
public function getTopicText()
{
return $this->topic_text;
}
/**
* Set topic
*
* #param \Socialist\ClubBundle\Entity\Topic $topic
* #return TopicContent
*/
public function setTopic(\Socialist\ClubBundle\Entity\Topic $topic = null)
{
$this->topic = $topic;
return $this;
}
/**
* Get topic
*
* #return \Socialist\ClubBundle\Entity\Topic
*/
public function getTopic()
{
return $this->topic;
}
}
Topic
namespace Socialist\ClubBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
* #ORM\Table(name="topic")
* #ORM\HasLifecycleCallbacks
*/
class Topic
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
protected $topic_id;
/**
* #ORM\Column(type="string", length=200)
*/
protected $topic_title;
/**
* #ORM\Column(type="datetime")
*/
protected $topic_date_add;
/**
* #ORM\Column(type="datetime")
*/
protected $topic_date_edit;
/**
* Get topic_id
*
* #return integer
*/
public function getTopicId()
{
return $this->topic_id;
}
/**
* Set topic_title
*
* #param string $topicTitle
* #return Topic
*/
public function setTopicTitle($topicTitle)
{
$this->topic_title = $topicTitle;
return $this;
}
/**
* Get topic_title
*
* #return string
*/
public function getTopicTitle()
{
return $this->topic_title;
}
/**
* Set topic_date_add
*
* #param \DateTime $topicDateAdd
* #return Topic
*/
public function setTopicDateAdd($topicDateAdd)
{
$this->topic_date_add = $topicDateAdd;
return $this;
}
/**
* Get topic_date_add
*
* #return \DateTime
*/
public function getTopicDateAdd()
{
return $this->topic_date_add;
}
/**
* Set topic_date_edit
*
* #param \DateTime $topicDateEdit
* #return Topic
*/
public function setTopicDateEdit($topicDateEdit)
{
$this->topic_date_edit = $topicDateEdit;
return $this;
}
/**
* Get topic_date_edit
*
* #return \DateTime
*/
public function getTopicDateEdit()
{
return $this->topic_date_edit;
}
/**
* #ORM\PrePersist
*/
public function setTopicDateAddValue() {
if (!$this->getTopicDateAdd())
{
$this->topic_date_add = new \DateTime();
}
}
/**
* #ORM\PreUpdate
*/
public function setTopicDateEditValue()
{
$this->topic_date_edit = new \DateTime();
}
public function __construct()
{
$this->setTopicDateAdd(new \DateTime());
$this->setTopicDateEdit(new \DateTime());
}
/**
* #ORM\OneToOne(targetEntity="TopicContent", mappedBy="topic", cascade={"persist", "remove"})
*/
private $topicContent;
/**
* Set topicContent
*
* #param \Socialist\ClubBundle\Entity\TopicContent $topicContent
* #return Topic
*/
public function setTopicContent(\Socialist\ClubBundle\Entity\TopicContent $topicContent = null)
{
$this->topicContent = $topicContent;
return $this;
}
/**
* Get topicContent
*
* #return \Socialist\ClubBundle\Entity\TopicContent
*/
public function getTopicContent()
{
return $this->topicContent;
}
}
Topic Entity
public function __construct()
{
$this->topicContent = new \Doctrine\Common\Collections\ArrayCollection();
$this->setTopicDateAdd(new \DateTime());
$this->setTopicDateEdit(new \DateTime());
}
/**
* Set topicContent
*
* #param \Socialist\ClubBundle\Entity\TopicContent $topicContent
* #return Topic
*/
public function setTopicContent(\Socialist\ClubBundle\Entity\TopicContent $topicContent = null)
{
$this->topicContent = $topicContent;
return $this;
}
Topic Controller
public function createAction(Request $request)
{
$entity = new Topic();
$form = $this->createCreateForm($entity);
$form->handleRequest($request);
if ($form->isValid()) {
$em = $this->getDoctrine()->getManager();
$em->persist($entity);
$em->flush();
return $this->redirect($this->generateUrl('topic_show', array('id' => $entity->getTopicId())));
}
return $this->render('SocialistClubBundle:Topic:new.html.twig', array(
'entity' => $entity,
'form' => $form->createView(),
));
}

Answer 1

After persisting your Topic Entity, you will get LastInserted topic id from your Topic entity
for example,
$em = $this->getDoctrine()->getManager();
$topic = new \Acme\TestBundle\Entity\Topic();
$topic->setTopicTitle('Your Title');
$em->persist($topic);
$em->flush(); //insert data into table
If insertion is ok $topic entity hold new row object inserted
You can get new topic id by getting
$newTopicId= $topic->getTopicId();
For Topic content Entity,
$topicContent= new new \Acme\TestBundle\Entity\TopicContent();
$topicContent->setTopicId($newTopicId);
$topicContent->setTopicText('Your topic text');
For avoid more confusion Please change your Topic Content Entity as follows,
namespace Socialist\ClubBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
* #ORM\Table(name="topic_content")
*/
class TopicContent
{
/**
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*
*/
protected $id;
/**
*
* #ORM\Column(name="topic_text", type="text", nullable=false)
*/
protected $topic_text;
/**
* #ORM\OneToOne(targetEntity="Topic", inversedBy="topicContent", cascade={"persist", "remove"})
* #ORM\JoinColumn(name="topic_id", referencedColumnName="topic_id", onDelete="CASCADE")
*/
private $topic;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set topic_text
*
* #param string $topicText
* #return TopicContent
*/
public function setTopicText($topicText)
{
$this->topic_text = $topicText;
return $this;
}
/**
* Get topic_text
*
* #return string
*/
public function getTopicText()
{
return $this->topic_text;
}
/**
* Set topic
*
* #param \Socialist\ClubBundle\Entity\Topic $topic
* #return TopicContent
*/
public function setTopic(\Socialist\ClubBundle\Entity\Topic $topic = null)
{
$this->topic = $topic;
return $this;
}
/**
* Get topic
*
* #return \Socialist\ClubBundle\Entity\Topic
*/
public function getTopic()
{
return $this->topic;
}
}`
The id should be primary key and autoincrement
this will resolve your all 'topic_id' burdens