Question

我试图了解保存和检索DateTime字段的正确方法。保存字段时，我必须传递一个DateTime对象，而不是像这样的字符串：

//Store a product
public function storeAction(Request $request) {
    $product = new Product();
    $createdAt = $request->request->get('createdAt');
    if (empty($createdAt)) {
        $product->setCreatedAt(null);
    } else {
        $product->setCreatedAt(new \DateTime($createdAt));
    }
    $em = $this->getDoctrine()->getManager();
    $em->persist($product);
    $em->flush();        
}

检索对象时，datetime字段作为DateTime对象返回，但createForm方法中的dataTransformer需要一个字符串..

//Show a product   
public function showAction()
{    
    $product = $this->getDoctrine()
        ->getRepository('AcmeStoreBundle:Product')
        ->find($id);
    //TransformationFailedException in DateTimeToStringTransformer.php line 138 
    $form = $this->createForm(new ProductType(), $product); 
}

表单构建器类

class ProductType extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('createdAt');
    }

    /**
     * @param OptionsResolverInterface $resolver
     */
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => '\Acme\ProductBundle\Entity\Product',
        ));
    }

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

Answer 1

在表单构建器中向字段添加类型：

class ProductType extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('createdAt', 'datetime');
    }

    /**
     * @param OptionsResolverInterface $resolver
     */
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => '\Acme\ProductBundle\Entity\Product',
        ));
    }

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

symfony2保存并检索datetime字段

1 个答案: