尝试在Symfony2中保留Doctrine2-Form中的数据时出现SQL错误

Question

到目前为止，我整天都在寻找我的问题的答案而没有成功。我想从Doctrine2生成的表单中获取数据并将其保存到Symfony2项目的SQL数据库中。这不起作用，我每次都面对这个例外：

An exception occurred while executing 'INSERT INTO mail (title, body, from, to, time) VALUES (?, ?, ?, ?, ?)' 
with params ["hello", "test", "charlie", "sepp", "2013-08-29 17:09:01"]:

SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL
 syntax; check the manual that corresponds to your MySQL server version 
for the right syntax to use near 'from, to, time) 
VALUES ('hello', 'test', 'charlie', 'sepp', '2013-08-29 17:09:01'' at line 1 

实体：

<?php

namespace daniel\mydemoBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 * @ORM\Table(name="mail")
 */
class Mail {
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @ORM\Column(type="string", length=100)
     */

    /**
     * @ORM\Column(type="string", length=200)
     */
    protected $title;

    /**
     * @ORM\Column(type="text")
     */
    protected $body;

    /**
     * @ORM\Column(type="string", length=100)
     */
    protected $from;

    /**
     * @ORM\Column(type="string", length=100)
     */
    protected $to;


    /**
     * @ORM\Column(type="datetime")
     */
    protected $time;



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

    /**
     * Set to
     *
     * @param string $to
     * @return Mail
     */
    public function setTo($to)
    {
        $this->to = $to;

        return $this;
    }

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

    /**
     * Set from
     *
     * @param string $from
     * @return Mail
     */
    public function setFrom($from)
    {
        $this->from = $from;

        return $this;
    }

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

    /**
     * Set time
     *
     * @param \DateTime $time
     * @return Mail
     */
    public function setTime($time)
    {
        $this->time = $time;

        return $this;
    }

    /**
     * Get time
     *
     * @return \DateTime 
     */
    public function getTime()
    {
        return $this->time;
    }

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

        return $this;
    }

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

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

        return $this;
    }

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

<?php namespace daniel\mydemoBundle\Entity; use Doctrine\ORM\Mapping as ORM; /** * @ORM\Entity * @ORM\Table(name="mail") */ class Mail { /** * @ORM\Id * @ORM\Column(type="integer") * @ORM\GeneratedValue(strategy="AUTO") */ protected $id; /** * @ORM\Column(type="string", length=100) */ /** * @ORM\Column(type="string", length=200) */ protected $title; /** * @ORM\Column(type="text") */ protected $body; /** * @ORM\Column(type="string", length=100) */ protected $from; /** * @ORM\Column(type="string", length=100) */ protected $to; /** * @ORM\Column(type="datetime") */ protected $time; /** * Get id * * @return integer */ public function getId() { return $this->id; } /** * Set to * * @param string $to * @return Mail */ public function setTo($to) { $this->to = $to; return $this; } /** * Get to * * @return string */ public function getTo() { return $this->to; } /** * Set from * * @param string $from * @return Mail */ public function setFrom($from) { $this->from = $from; return $this; } /** * Get from * * @return string */ public function getFrom() { return $this->from; } /** * Set time * * @param \DateTime $time * @return Mail */ public function setTime($time) { $this->time = $time; return $this; } /** * Get time * * @return \DateTime */ public function getTime() { return $this->time; } /** * Set title * * @param string $title * @return Mail */ public function setTitle($title) { $this->title = $title; return $this; } /** * Get title * * @return string */ public function getTitle() { return $this->title; } /** * Set body * * @param string $body * @return Mail */ public function setBody($body) { $this->body = $body; return $this; } /** * Get body * * @return string */ public function getBody() { return $this->body; } }

控制器：

<?php

namespace daniel\mydemoBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\Form;
use daniel\mydemoBundle\Entity\Mail;
use daniel\mydemoBundle\Form\MailType;

class MailController extends Controller {

    public function newAction() {
        $mail = new Mail();
        $form = $this->createForm(new MailType(), $mail);

        return $this->render('danielmydemoBundle:Mail:form.html.twig', array(
            'mail' => $mail,
            'form' => $form->createView()
        ));
    }

    public function sendAction() {

        $mail = new Mail();
        $user = $this->getUser()->getUsername();
        $mail->setFrom($user);
        $mail->setTime(new \DateTime());
        $request = $this->getRequest();
        $form = $this->createForm(new MailType(), $mail);
        $form->bind($request);

        if ($form->isValid()) {

            $em = $this->getDoctrine()->getManager();
            $em->persist($mail);
            $em->flush();

            return $this->redirect($this->generateUrl('danielmydemo_homepage'));
        }

        return $this->render('danielmydemoBundle:Mail:sendmail.html.twig', array(
            'mail' => $mail,
            'form' => $form
        ));


    }

    public function showAction()
    {
        $em = $this->getDoctrine()
            ->getManager();

        $mails = $em->createQueryBuilder()
            ->select('b')
            ->from('danielmydemoBundle:Mail', 'b')
            ->addOrderBy('b.time', 'DESC')
            ->getQuery()
            ->getResult();

        return $this->render('danielmydemoBundle:Mail:mailbox.html.twig',  array('mails' => $mails));
    }

}

FormType：

<?php namespace daniel\mydemoBundle\Controller; use Symfony\Bundle\FrameworkBundle\Controller\Controller; use Symfony\Component\Form; use daniel\mydemoBundle\Entity\Mail; use daniel\mydemoBundle\Form\MailType; class MailController extends Controller { public function newAction() { $mail = new Mail(); $form = $this->createForm(new MailType(), $mail); return $this->render('danielmydemoBundle:Mail:form.html.twig', array( 'mail' => $mail, 'form' => $form->createView() )); } public function sendAction() { $mail = new Mail(); $user = $this->getUser()->getUsername(); $mail->setFrom($user); $mail->setTime(new \DateTime()); $request = $this->getRequest(); $form = $this->createForm(new MailType(), $mail); $form->bind($request); if ($form->isValid()) { $em = $this->getDoctrine()->getManager(); $em->persist($mail); $em->flush(); return $this->redirect($this->generateUrl('danielmydemo_homepage')); } return $this->render('danielmydemoBundle:Mail:sendmail.html.twig', array( 'mail' => $mail, 'form' => $form )); } public function showAction() { $em = $this->getDoctrine() ->getManager(); $mails = $em->createQueryBuilder() ->select('b') ->from('danielmydemoBundle:Mail', 'b') ->addOrderBy('b.time', 'DESC') ->getQuery() ->getResult(); return $this->render('danielmydemoBundle:Mail:mailbox.html.twig', array('mails' => $mails)); } }

我的SQL表：

<?php

namespace daniel\mydemoBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;

class MailType extends AbstractType
{
        /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('title')
            ->add('body')
            //->add('from')
            ->add('to')
            //->add('time')
        ;
    }

    /**
     * @param OptionsResolverInterface $resolver
     */
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'daniel\mydemoBundle\Entity\Mail'
        ));
    }

    /**
     * @return string
     */
    public function getName()
    {
        return 'daniel_mydemobundle_mail';
    }
}

思想：

• 如果我发表评论<?php namespace daniel\mydemoBundle\Form; use Symfony\Component\Form\AbstractType; use Symfony\Component\Form\FormBuilderInterface; use Symfony\Component\OptionsResolver\OptionsResolverInterface; class MailType extends AbstractType { /** * @param FormBuilderInterface $builder * @param array $options */ public function buildForm(FormBuilderInterface $builder, array $options) { $builder ->add('title') ->add('body') //->add('from') ->add('to') //->add('time') ; } /** * @param OptionsResolverInterface $resolver */ public function setDefaultOptions(OptionsResolverInterface $resolver) { $resolver->setDefaults(array( 'data_class' => 'daniel\mydemoBundle\Entity\Mail' )); } /** * @return string */ public function getName() { return 'daniel_mydemobundle_mail'; } } ，我会被重定向到主页。但是，该条目不会被保存。因此，我假设输入被正确识别，问题似乎与SQL语句或表格有关。

• 我在项目中发生了另一个非常类似的ORM故事。这可能是个问题吗？

我完全迷失了，并且确定我没有看到明显的。