Symfony2 dropdown form from database - php

Question

So i want to display all the courses within my database in a drop down form. a user who is logged in then select one of the drop downs and it would store the users ID and the course ID into the database. How would i go about doing this?
Here's my course entity course.php
<?php
// src/Simple/SimpleBundle/Entity/Course.php
namespace Simple\ProfileBundle\Entity;
use Symfony\Component\Security\Core\User\UserInterface;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
* #ORM\Table(name="course")
*/
class Course
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\Column(name="course", type="string", length=255)
*/
protected $course;
public function __construct()
{
$this->users = new ArrayCollection();
}
public function setCourse($course)
{
$this->course = $course;
}
public function getCourse()
{
return $this->course;
}
public function setId($id)
{
$this->id = $id;
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
}
ChooseCourseType.php my form
<?php
// src/Simple/ProfileBundle/Controller/ChooseCourseType.php
namespace Simple\ProfileBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
class ChooseCourseType extends AbstractType
{
private $course;
public function buildForm(FormBuilderInterface $builder, array $options) {
$builder->add('course', 'choice', array(
'choices' => $this->course,
));
$builder->add('Choose Course', 'submit');
}
public function getName()
{
return 'name';
}
public function getCourse()
{
return 'course';
}
}
Coursecontroller.php
function chooseAction(Request $request)
{
$em = $this->getDoctrine()->getManager();
$form = $this->createForm(new ChooseCourseType(), $CourseType);
$form->handleRequest($request);
if ($form->isValid()) {
$course = $form->getData();
$em->persist($course->getCourse());
$em->flush();
}
return $this->render(
'SimpleProfileBundle:Course:choosecourse.html.twig',
array('form' => $form->createView())
);
}
}
User.php
namespace Simple\ProfileBundle\Entity;
use Symfony\Component\Serializer\Serializer;
use Symfony\Component\Serializer\Encoder\XmlEncoder;
use Symfony\Component\Serializer\Encoder\JsonEncoder;
use Symfony\Component\Serializer\Normalizer\GetSetMethodNormalizer;
use Symfony\Component\Security\Core\User\UserInterface;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
* #ORM\Table(name="users")
*/
class User implements UserInterface
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\Column(name="user", type="string", length=255)
*/
protected $username;
/**
* #ORM\Column(name="password", type="string", length=255)
*/
protected $password;
/**
* #ORM\Column(name="salt", type="string", length=255)
*/
protected $salt;
/**
* #ORM\ManyToMany(targetEntity="Role")
* #ORM\JoinTable(name="user_role",
* joinColumns={#ORM\JoinColumn(name="user_id", referencedColumnName="id")},
* inverseJoinColumns={#ORM\JoinColumn(name="role_id", referencedColumnName="id")}
* )
*/
protected $roles;
/**
* #ORM\ManyToMany(targetEntity="Course")
* #ORM\JoinTable(name="user_course",
* joinColumns={#ORM\JoinColumn(name="user_id", referencedColumnName="id")},
* inverseJoinColumns={#ORM\JoinColumn(name="course_id",
referencedColumnName="id")}
* )
*/
protected $courses;
/**
* #inheritDoc
*/
public function getUsername()
{
return $this->username;
}
/**
* #inheritDoc
*/
public function getSalt()
{
return '';
}
/**
* #inheritDoc
*/
public function getPassword()
{
return $this->password;
}
/**
* #inheritDoc
*/
public function getRoles()
{
return $this->roles->toArray();
}
/**
* #inheritDoc
*/
public function eraseCredentials()
{
}
/**
* Constructor
*/
public function __construct()
{
$this->roles = new \Doctrine\Common\Collections\ArrayCollection();
$this->salt = sha1(uniqid(null, true));
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set user
*
* #param string $user
* #return User
*/
public function setUser($user)
{
$this->user = $user;
return $this;
}
/**
* Get user
*
* #return string
*/
public function getUser()
{
return $this->user;
}
/**
* Set password
*
* #param string $password
* #return User
*/
public function setPassword($password)
{
$this->password = $password;
return $this;
}
/**
* Set salt
*
* #param string $salt
* #return User
*/
public function setSalt($salt)
{
$this->salt = $salt;
return $this;
}
/**
* Add roles
*
* #param \Simple\ProfileBundle\Entity\Role $roles
* #return User
*/
public function addRole(\Simple\ProfileBundle\Entity\Role $roles)
{
$this->roles[] = $roles;
return $this;
}
/**
* Remove roles
*
* #param \Simple\ProfileBundle\Entity\Role $roles
*/
public function removeRole(\Simple\ProfileBundle\Entity\Role $roles)
{
$this->roles->removeElement($roles);
}
/**
* Add roles
*
* #param \Simple\ProfileBundle\Entity\Course $courses
* #return User
*/
public function addCourse(\Simple\ProfileBundle\Entity\Course $courses)
{
$this->course[] = $courses;
return $this;
}
}
What else am i missing i am new to symfony2 and just need some direction.
Cheers

Answer 1

You need to use the entity form type.
Form type
<?php
// src/Simple/ProfileBundle/Controller/ChooseCourseType.php
namespace Simple\ProfileBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
class ChooseCourseType extends AbstractType {
$builder->add('courses', 'entity', array(
'label' => 'Courses',
'class' => 'SimpleSimpleBundle:Course',
'expanded' => false,
'multiple' => false
))
// ...
Controller
function chooseAction(Request $request) {
$em = $this->getDoctrine()->getManager();
// Replace this with whatever logic you use to find the user
$user = $em->getRepository('SimpleSimpleBundle:User')->findOneBy(
array('id' => 1)
);
$form = $this->createForm(new ChooseCourseType(), $user);
$form->handleRequest($request);
if ($form->isValid()) {
$user = $form->getData();
// Since you've bound this user object to the form and properly
// created a relationship between the course and user entities
// the relationship between course and user will persist here
$em->persist($user);
$em->flush();
}