Symfony 2表单未保存来自select的数据（在联接表上） [英] Symfony 2 Form not saving data from select (on joined table)

问题描述

我创建了一个看起来正确的表单，它具有一些文本字段和一个选择框，其中包含从我所拥有的国家列表中拉出的国家/地区列表。选择框使用正确的值值正确显示，并显示文本。但是，当我提交表单时，我得到一个例外：

I have created a form that appears to be correct, it has a few text fields and a select box with a list of countries pulled from a table of countries I have. The select box displays correctly using the the correct values for it's 'value' and display text. When I submit the form however I get an exception:

SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'countryid' cannot be null 

如果我将数据库表（在PHPMyAdmin中）设置为允许countryid字段为空值

If I set the database table (in PHPMyAdmin) to allow a null value for the countryid field it enters the record with no exception but the entry for the countryid is null.

我的控制器具有以下代码：

my controller has the following code:

        $duck = new \Wfuk\DuckBundle\Entity\Ducks();

    $form = $this->createFormBuilder($duck)
       ->add('city', 'text')
       ->add('countryid', 'entity', array('class' => 'WfukDuckBundle:Country', 'property' => 'country'))
       // cut other fields
       ->getForm();

    if ($request->getMethod() == 'POST') {
        $form->bindRequest($request);

    $errors = $this->get('validator')->validate( $form );

    echo $duck->getCountryid();

    if ($form->isValid()) {
        $em = $this->getDoctrine()->getEntityManager();
        $em->persist($duck);
        $em->flush();
        return $this->redirect($this->generateUrl('upload_duck_success'));
        }

其中的回显返回country对象的__toString函数，这似乎有点奇怪-但这是在表单中选择的国家的完整国家信息。

the echo in there returns the __toString function of the country object which seems a bit odd - but it is the full country info for the country chosen in the form.

在Ducks.php类中：

in the Ducks.php class:

 /**
 * @var string $countryid
 *
 * @ORM\Column(name="countryid", type="string", length=2, nullable=false)
 */
private $countryid;

/**
 * Set countryid
 *
 * @param string $countryId
 */
public function setCountryid($countryid)
{
    $this->countryid = $countryid;
}

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

这是我的第一个symfony项目，但是我已经在文档时代，以为我已经一切就绪...

This is my first symfony project, but I've been over the docs several times and think I have everything set up ok...

编辑：

我已经建立了一个联接如下所示：
Ducks.php

I have a join set up as follows: Ducks.php

/**
 * @ORM\ManyToOne(targetEntity="Country", inversedBy="ducks")
 * @ORM\JoinColumn(name="countryid", referencedColumnName="id")
 */
private $country;

/**
 * Set country
 *
 * @param string $country
 */
public function setCountry($country)
{
    $this->country = $country;
}

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

在Country.php上：

and on the Country.php side:

/**
 * @ORM\OneToMany(targetEntity="Ducks", mappedBy="country")
 */
protected $ducks;

public function __construct()
{
    $this->ducks = new ArrayCollection();
}

/**
 * Get ducks
 *
 * @return Doctrine\Common\Collections\Collection 
 */
public function getDucks()
{
    return $this->ducks;
}

推荐答案

正在发生的事情是该表单正在向鸭子发送实际的Country对象。您可以使用以下命令进行确认：

What's happening is that the form is sending an actual Country object to ducks. You can confirm this with:

public function setCountryid($countryid)
{
    if (is_object($countryid)) die('Yep, got a country object.');
    $this->countryid = $countryid;
}

听起来您只想存储2个字符的国家/地区代码？您不想要实际的关系吗？如果是这样，那么这可能会解决问题：

It sounds like you only want to store a 2 char country code? You don't want an actual relation? If so then this might do the trick:

public function setCountryid($countryid)
{
    if (is_object($countryid)) $countryid = $countryid->getId();
    $this->countryid = $countryid;
}

如果您想在鸭子与国家之间建立一种真正的由教义管理的关系，那么类似：

If you want an actual normal Doctrine managed relation between duck and country then something like:

/**
 * @ORM\ManyToOne(targetEntity="Country")
 * @ORM\JoinColumn(name="country_id", referencedColumnName="id")
 */
 */
private $country;

然后相应地调整您的吸气剂/吸气剂。

And adjust your getter/setters accordingly.

您似乎同时拥有yml和注释，这有点奇怪。据我了解，您可以在给定的捆绑包中使用其中一个。

It's a bit strange that you seem to have both yml and annotations. From what I understood, you could use one or the other in a given bundle.

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