Symfony2 add custom field to form builder - forms

Question

I have an Entity Event which has a field keywords which is mapper One-to-Many to another Entity EventKeywords. I also have a form type class CreateEventFormType. I create the form in my controller using this code:
$event = new Event();
$form = $this->createForm(new CreateEventFormType(), $event);
but I also need additional input field for keywords which will be used to create object EventKeywords. I've tried to add that to my formBuilderInterface:
->add('keywords', 'text', [
'constraints' =>[
new Assert\NotBlank([
'message' => "Renginio raktažodžiai negali būti tušti"
]),
new Assert\Length([
'min' => "2",
'max' => "255",
'minMessage' => "Renginio raktažodžiai negali būti trumpesni nei {{ limit }} simboliai",
'maxMessage' => "Renginio raktažodžiai negali būti ilgesni nei {{ limit }} simboliai"
])
]
])
but then I get error
Neither the property "keywords" nor one of the methods "addKeyword()"/"removeKeyword()", "setKeywords()", "keywords()", "__set()" or "__call()" exist and have public access in class "Atotrukis\MainBundle\Entity\Event".
Full Entities and FormType code:
createEventFormType.php
<?php
namespace Atotrukis\MainBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Doctrine\ORM\EntityRepository;
use Symfony\Component\Validator\Constraints as Assert;
class CreateEventFormType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name', 'text', [
'constraints' =>[
new Assert\NotBlank([
'message' => "Renginio pavadinimas negali būti tuščias"
]),
new Assert\Length([
'min' => "2",
'max' => "255",
'minMessage' => "Renginio pavadinimas negali būti trumpesnis nei {{ limit }} simboliai",
'maxMessage' => "Renginio pavadinimas negali būti ilgesnis nei {{ limit }} simboliai"
])
]
])
->add('description', 'textarea', [
'constraints' =>[
new Assert\NotBlank([
'message' => "Renginio aprašymas negali būti tuščias"
]),
new Assert\Length([
'min' => "10",
'max' => "5000",
'minMessage' => "Renginio aprašymas negali būti trumpesnis nei {{ limit }} simbolių",
'maxMessage' => "Renginio aprašymas negali būti ilgesnis nei {{ limit }} simbolių"
])
]
])
->add('startDate', 'datetime', [
'constraints' =>[
new \Atotrukis\MainBundle\Validator\Constraints\FutureDateTime([
'message' => "Pradžios laikas negali būti ankstesnis už dabartinį laiką."
])
]
])
->add('endDate', 'datetime', [
'constraints' =>[
new \Atotrukis\MainBundle\Validator\Constraints\FutureDateTime([
'message' => "Pabaigos laikas negali būti ankstesnis už dabartinį laiką."
])
]
])
->add('keywords', 'text', [
'constraints' =>[
new Assert\NotBlank([
'message' => "Renginio raktažodžiai negali būti tušti"
]),
new Assert\Length([
'min' => "2",
'max' => "255",
'minMessage' => "Renginio raktažodžiai negali būti trumpesni nei {{ limit }} simboliai",
'maxMessage' => "Renginio raktažodžiai negali būti ilgesni nei {{ limit }} simboliai"
])
]
])
->add('map', 'hidden')
->add('city', 'entity', array(
'class' => 'AtotrukisMainBundle:City',
'property' => 'name',
'constraints' =>[
new Assert\NotBlank([
'message' => "Privalote pasirinkti miestą"
])
],
'empty_value' => 'Pasirinkite miestą',
'query_builder' => function(EntityRepository $er) {
return $er->createQueryBuilder('c')
->addOrderBy('c.priority', 'ASC')
->addOrderBy('c.name', 'ASC');
},
));
// ->add('save', 'submit', array('label' => 'Sukurti'));
}
public function getName()
{
return 'createEventForm';
}
}
Event.php
<?php
namespace Atotrukis\MainBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
use Atotrukis\MainBundle\Validator\Constraints as CustomAssert;
/**
* #ORM\Entity
* #ORM\Table(name="events")
* #CustomAssert\DateRange
*/
class Event
{
/**
* #ORM\Column(type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\Column(type="string", length=255)
*/
protected $name;
/**
* #ORM\Column(type="text")
*/
protected $description;
/**
* #ORM\Column(type="datetime")
*/
protected $startDate;
/**
* #ORM\Column(type="datetime")
*/
protected $endDate;
/**
* #ORM\ManyToOne(targetEntity="User", inversedBy="events")
* #ORM\JoinColumn(name="createdBy", referencedColumnName="id")
*/
protected $createdBy;
/**
* #ORM\Column(type="datetime")
*/
protected $createdOn;
/**
* #ORM\Column(type="string", length=2083)
*/
protected $map;
/**
* #ORM\OneToMany(targetEntity="EventPhoto", mappedBy="eventId")
*/
protected $photos;
/**
* #ORM\OneToMany(targetEntity="UserAttending", mappedBy="eventId")
*/
protected $usersAttending;
/**
* #ORM\OneToMany(targetEntity="EventKeywords", mappedBy="eventId")
*/
protected $keywords;
/**
* #ORM\ManyToOne(targetEntity="City", inversedBy="eventId")
* #ORM\JoinColumn(name="city", referencedColumnName="id")
*/
protected $city;
public function __construct()
{
$this->createdOn = new \DateTime();
$this->keywords = new ArrayCollection();
//parent::__construct();
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* #param string $name
* #return Event
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}
/**
* Set description
*
* #param string $description
* #return Event
*/
public function setDescription($description)
{
$this->description = $description;
return $this;
}
/**
* Get description
*
* #return string
*/
public function getDescription()
{
return $this->description;
}
/**
* Set startDate
*
* #param \DateTime $startDate
* #return Event
*/
public function setStartDate($startDate)
{
$this->startDate = $startDate;
return $this;
}
/**
* Get startDate
*
* #return \DateTime
*/
public function getStartDate()
{
return $this->startDate;
}
/**
* Set endDate
*
* #param \DateTime $endDate
* #return Event
*/
public function setEndDate($endDate)
{
$this->endDate = $endDate;
return $this;
}
/**
* Get endDate
*
* #return \DateTime
*/
public function getEndDate()
{
return $this->endDate;
}
/**
* Set createdBy
*
* #param integer $createdBy
* #return Event
*/
public function setCreatedBy($createdBy)
{
$this->createdBy = $createdBy;
return $this;
}
/**
* Get createdBy
*
* #return integer
*/
public function getCreatedBy()
{
return $this->createdBy;
}
/**
* Set createdOn
*
* #param \DateTime $createdOn
* #return Event
*/
public function setCreatedOn($createdOn)
{
$this->createdOn = $createdOn;
return $this;
}
/**
* Get createdOn
*
* #return \DateTime
*/
public function getCreatedOn()
{
return $this->createdOn;
}
/**
* Add photos
*
* #param \Atotrukis\MainBundle\Entity\EventPhoto $photos
* #return Event
*/
public function addPhoto(\Atotrukis\MainBundle\Entity\EventPhoto $photos)
{
$this->photos[] = $photos;
return $this;
}
/**
* Remove photos
*
* #param \Atotrukis\MainBundle\Entity\EventPhoto $photos
*/
public function removePhoto(\Atotrukis\MainBundle\Entity\EventPhoto $photos)
{
$this->photos->removeElement($photos);
}
/**
* Get photos
*
* #return \Doctrine\Common\Collections\Collection
*/
public function getPhotos()
{
return $this->photos;
}
/**
* Set map
*
* #param string $map
* #return Event
*/
public function setMap($map)
{
$this->map = $map;
return $this;
}
/**
* Get map
*
* #return string
*/
public function getMap()
{
return $this->map;
}
/**
* Set city
*
* #param \Atotrukis\MainBundle\Entity\City $city
* #return Event
*/
public function setCity(\Atotrukis\MainBundle\Entity\City $city = null)
{
$this->city = $city;
return $this;
}
/**
* Get city
*
* #return \Atotrukis\MainBundle\Entity\City
*/
public function getCity()
{
return $this->city;
}
/**
* Add usersAttending
*
* #param \Atotrukis\MainBundle\Entity\UserAttending $usersAttending
* #return Event
*/
public function addUsersAttending(\Atotrukis\MainBundle\Entity\UserAttending $usersAttending)
{
$this->usersAttending[] = $usersAttending;
return $this;
}
/**
* Remove usersAttending
*
* #param \Atotrukis\MainBundle\Entity\UserAttending $usersAttending
*/
public function removeUsersAttending(\Atotrukis\MainBundle\Entity\UserAttending $usersAttending)
{
$this->usersAttending->removeElement($usersAttending);
}
/**
* Get usersAttending
*
* #return \Doctrine\Common\Collections\Collection
*/
public function getUsersAttending()
{
return $this->usersAttending;
}
/**
* Add keywords
*
* #param \Atotrukis\MainBundle\Entity\EventKeywords $keywords
* #return Event
*/
public function addKeyword(\Atotrukis\MainBundle\Entity\EventKeywords $keywords)
{
$this->keywords[] = $keywords;
return $this;
}
/**
* Remove keywords
*
* #param \Atotrukis\MainBundle\Entity\EventKeywords $keywords
*/
public function removeKeyword(\Atotrukis\MainBundle\Entity\EventKeywords $keywords)
{
$this->keywords->removeElement($keywords);
}
/**
* Get keywords
*
* #return \Doctrine\Common\Collections\Collection
*/
public function getKeywords()
{
return $this->keywords;
}
/**
* Set keywords
*
* #param \Atotrukis\MainBundle\Entity\EventKeywords $keywords
* #return Event
*/
public function setKeywords(\Atotrukis\MainBundle\Entity\EventKeywords $keywords = null)
{
$this->keywords = $keywords;
return $this;
}
}
EventKeywords.php
<?php
namespace Atotrukis\MainBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
* #ORM\Table(name="event_keywords")
*/
class EventKeywords
{
/**
* #ORM\Column(type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\Column(type="string", length=255)
*/
protected $keyword;
/**
* #ORM\ManyToOne(targetEntity="Event", inversedBy="keywords")
* #ORM\JoinColumn(name="eventId", referencedColumnName="id")
*/
protected $eventId;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set eventId
*
* #param \Atotrukis\MainBundle\Entity\Event $eventId
* #return UserAttending
*/
public function setEventId(\Atotrukis\MainBundle\Entity\Event $eventId = null)
{
$this->eventId = $eventId;
return $this;
}
/**
* Get eventId
*
* #return \Atotrukis\MainBundle\Entity\Event
*/
public function getEventId()
{
return $this->eventId;
}
/**
* Set keyword
*
* #param string $keyword
* #return EventKeywords
*/
public function setKeyword($keyword)
{
$this->keyword = $keyword;
return $this;
}
/**
* Get keyword
*
* #return string
*/
public function getKeyword()
{
return $this->keyword;
}
}

Answer 1

What you have to do is :
->add('yourfield', 'choice', array(
'label' => 'Your Field',
'required' => false,
'choices' => array(true => 'Yes', false => 'No'),
'empty_value' => false,
'mapped' => false
))
Pay attention to 'mapped' => false . It means that this field has nothing to do with your entity(object) . It does not exist in your Class at all.
Doing this, you will be able to add as many additional fields you want.