我需要获取 symfony 2.7 实体内表的最大 ID。但我没有得到 id，而是遇到了这个问题。
注意：未定义的属性：AppBundle\Entity\BlogPost::$container
这是我的 BlogPost 实体，
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\HttpFoundation\File\UploadedFile;
/**
* BlogPost
*
* @ORM\Table()
* @ORM\Entity
*/
class BlogPost {
const SERVER_PATH_TO_IMAGE_FOLDER = '/uploads';
/**
* @var integer
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="title", type="string", length=255)
*/
private $title;
/**
* @var string
*
* @ORM\Column(name="body", type="text")
*/
private $body;
/**
* @var string
*
* @ORM\Column(name="filename", type="text")
*/
private $filename;
/**
* Set filename
*
* @param string $filename
* @return BlogPost
*/
public function setFilename($filename) {
$this->filename = $filename;
return $this;
}
public function setUploader(UploadedFile $file) {
$em = $this->container->get('doctrine.orm.entity_manager');
$highest_id = $em->createQueryBuilder()
->select('MAX(b.id)')
->from('AppBundle:BlogPost', 'b')
->getQuery()
->getSingleScalarResult();
var_dump($highest_id);
exit();// exit for check value
$url = 'uploads/events';
$file_name = 'fsdf.' . $file->guessExtension();
$file->move($url, $file_name);
}
/**
* Get filename
*
* @return string
*/
public function getFilename() {
return $this->filename;
}
/**
* @var boolean
*
* @ORM\Column(name="draft", type="boolean")
*/
private $draft;
/**
* Get id
*
* @return integer
*/
public function getId() {
return $this->id;
}
/**
* Set title
*
* @param string $title
* @return BlogPost
*/
public function setTitle($title) {
$this->title = $title;
return $this;
}
/**
* Get title
*
* @return string
*/
public function getTitle() {
return $this->title;
}
/**
* Set body
*
* @param string $body
* @return BlogPost
*/
public function setBody($body) {
$this->body = $body;
return $this;
}
/**
* Get body
*
* @return string
*/
public function getBody() {
return $this->body;
}
/**
* Set draft
*
* @param boolean $draft
* @return BlogPost
*/
public function setDraft($draft) {
$this->draft = $draft;
return $this;
}
/**
* Get draft
*
* @return boolean
*/
public function getDraft() {
return $this->draft;
}
/**
* @ORM\ManyToOne(targetEntity="Category", inversedBy="blogPosts")
*/
private $category;
public function setCategory(Category $category) {
$this->category = $category;
}
public function getCategory() {
return $this->category;
}
/**
* Unmapped property to handle file uploads
*/
public $file;
/**
* Sets file.
*
* @param UploadedFile $file
*/
public function setFile(UploadedFile $file = null) {
$this->file = $file;
}
/**
* Get file.
*
* @return UploadedFile
*/
public function getFile() {
return $this->file;
}
/**
* Manages the copying of the file to the relevant place on the server
*/
public function upload() {
// the file property can be empty if the field is not required
if (null === $this->getFile()) {
return;
}
// we use the original file name here but you should
// sanitize it at least to avoid any security issues
// move takes the target directory and target filename as params
$this->getFile()->move(
self::SERVER_PATH_TO_IMAGE_FOLDER, $this->getFile()->getClientOriginalName()
);
// set the path property to the filename where you've saved the file
$this->filename = $this->getFile()->getClientOriginalName();
// clean up the file property as you won't need it anymore
$this->setFile(null);
}
/**
* Lifecycle callback to upload the file to the server
*/
public function lifecycleFileUpload() {
$this->upload();
}
/**
* Updates the hash value to force the preUpdate and postUpdate events to fire
*/
public function refreshUpdated() {
// $this->setUpdated(new \DateTime());
}
// ... the rest of your class lives under here, including the generated fields
// such as filename and updated
}
这是我试图获取最大 id 的部分，
public function setUploader(UploadedFile $file) {
$em = $this->container->get('doctrine.orm.entity_manager');
$highest_id = $em->createQueryBuilder()
->select('MAX(b.id)')
->from('AppBundle:BlogPost', 'b')
->getQuery()
->getSingleScalarResult();
var_dump($highest_id);
exit();// exit for check value
$url = 'uploads/events';
$file_name = 'fsdf.' . $file->guessExtension();
$file->move($url, $file_name);
}
在评论和少量研究的帮助下，我发现问题出在“entity_manager”部分。有没有办法在实体内部调用学说查询？
如果我是你，我会做类似的事情：
控制器：
$blogPost= new BlogPost () ;
$em = $this->getDoctrine()->getManager();
//..your code
// I assume you want to do that after a form post
$blogPost = $form->getData();
$id = $em->getRepository('AppBundle:BlogPost')->getMaxId();
$blogPost->setUploader($id);
//...
存储库：
public function getMaxId()
{
$qb = $this->createQueryBuilder('u');
$qb->select('u, MAX(id) as idMax');
return $qb->getQuery()->getSingleResult();
}
实体：
public function setUploader(UploadedFile $file, $id)
{
var_dump($id);
$url = 'uploads/events';
$file_name = 'fsdf.'.$id.$file->guessExtension();
$file->move($url, $file_name);
}
应该有效
我建议将
EntityManagerclass variableEntityconstructorsetter-method这应该是最干净、最好可读的解决方案。
在您的控制器中尝试一下：
$blogPost= new BlogPost () ;
$em = $this->getDoctrine()->getManager();
$blogPost = $form->getData();
$maxId = $em->getRepository('AppBundle:BlogPost')->createQueryBuilder('b')
->where("MAX(b.id) as maxId")
->getQuery()
->getSingleResult();
形成另一个线程，我发现了这个，它对我有用。
global $kernel;
if ( 'AppCache' == get_class($kernel) )
{
$kernel = $kernel->getKernel();
}
$em = $kernel->getContainer()->get( 'doctrine.orm.entity_manager');
我无法在控制器中使用它，因为我有一个管理类而不是控制器。由于很多人建议在实体内使用entity_manager并不是一个好的做法，所以我使用管理类内的代码而不是实体。
这是原帖..
如何在Entity内部使用entityManager？