Symfony 如何在SonataAdminBundle中的博客实体中上载？

我是新的symfony，我尝试在SonataAdminBundle中上载img。我遵循以下文档： 但我有一个错误：

可捕获致命错误：参数1传递给 MyBlogBundle\Entity\Blog:：setFile（）必须是的实例 MyBlogBundle\Entity\UploadedFile，的实例 Symfony\Component\HttpFoundation\File\UploadedFile给定，在中调用 C:\OpenServer\domains\Symfony.test\vendor\Symfony\Symfony\src\Symfony\Component\PropertyAccess\PropertyAccessor.php 在第442行并定义

有人能帮我吗

我的博客实体： //src/MyBLogBundle/Entity/Blog.php 班级博客{

const SERVER_PATH_TO_IMAGE_FOLDER = 'src/MyBlogBundle/Resources/public/images';

/**
 * Unmapped property to handle file uploads
 */
private $file;

/**
 * @var integer
 *
 * @ORM\Column(name="id", type="integer")
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="AUTO")
 */
private $id;

/**
 * @var string
 *
 * @ORM\Column(name="author", type="string", length=255)
 */
private $author;

/**
 * @var string
 *
 * @ORM\Column(name="title", type="string", length=255)
 */
private $title;

/**
 * @var string
 *
 * @ORM\Column(name="text", type="text")
 */
private $text;

/**
 * @var \DateTime
 *
 * @ORM\Column(name="createDate", type="datetime")
 */
private $createDate;

/**
 * @var \DateTime
 *
 * @ORM\Column(name="updateDate", type="datetime")
 */
private $updateDate;

/**
 * @var string
 *
 * @ORM\Column(name="image", type="string", length=255)
 */
private $image;

/**
 * @var string
 *
 * @ORM\Column(name="tag", type="string", length=255)
 */
private $tag;

/**
 *
 * @ORM\OneToMany(targetEntity="Comment",mappedBy="blog")
 */
private $comment;

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

/**
 * Set author
 *
 * @param string $author
 * @return Blog
 */
public function setAuthor($author) {
    $this->author = $author;

    return $this;
}

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

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

    return $this;
}

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

/**
 * Set text
 *
 * @param string $text
 * @return Blog
 */
public function setText($text) {
    $this->text = $text;

    return $this;
}

/**
 * Get text
 *
 * @return string 
 */
public function getText($count = NULL) {
    if ($count != NULL) {
        $arr = explode(' ', $this->text);
        $arr = array_slice($arr, 0, $count);
        $this->text = implode(' ', $arr) . '...';
    }
    return $this->text;
}

/**
 * Set createDate
 * @ORM\PrePersist
 * @param \DateTime $createDate
 * @return Blog
 */
public function setCreateDate() {
    $this->createDate = new \DateTime();

    return $this;
}

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

/**
 * Set updateDate
 * @ORM\PreUpdate
 * @param \DateTime $updateDate
 * @return Blog
 */
public function setUpdateDate() {
    $this->updateDate = new \DateTime();
    return $this;
}
/**
 * Get updateDate
 *
 * @return \DateTime 
 */
public function getUpdateDate() {
    return $this->updateDate;
}

/**
 * Set image
 *
 * @param string $image
 * @return Blog
 */
public function setImage($image) {
    $this->image = $image;

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

/**
 * Set tag
 *
 * @param string $tag
 * @return Blog
 */
public function setTag($tag) {
    $this->tag = $tag;

    return $this;
}

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

public function __construct() {
    $this->comment = new ArrayCollection();
    $this->updateDate = new \DateTime();
}

/**
 * Add comment
 *
 * @param \MyBlogBundle\Entity\Comment $comment
 * @return Blog
 */
public function addComment(\MyBlogBundle\Entity\Comment $comment) {
    $this->comment[] = $comment;

    return $this;
}

/**
 * Remove comment
 *
 * @param \MyBlogBundle\Entity\Comment $comment
 */
public function removeComment(\MyBlogBundle\Entity\Comment $comment) {
    $this->comment->removeElement($comment);
}

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

/**
 * 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(
            Image::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("now"));
}

}

我的博客管理员： 名称空间MyBlogBundle\Admin

use Sonata\AdminBundle\Admin\Admin;
use Sonata\AdminBundle\Datagrid\ListMapper;
use Sonata\AdminBundle\Datagrid\DatagridMapper;
use Sonata\AdminBundle\Form\FormMapper;

class BlogAdmin extends Admin
{
    protected $baseRouteName = 'MyBlogBundle\Entity\BlogAdmin'; 
    protected $baseRoutePattern = 'blog_admin';  

    protected function configureFormFields(FormMapper $formMapper)
    {
        $formMapper
            ->add('title', 'text', array('label' => 'Blog Title'))
            ->add('tag','text')
            ->add('file', 'file', array('required' => false))
            ->add('text','textarea') //if no type is specified, SonataAdminBundle tries to guess it
            ->add('author')
        ;
    }
    protected function configureDatagridFilters(DatagridMapper $datagridMapper)
    {
        $datagridMapper
            ->add('title')
            ->add('author')
        ;
    }
    protected function configureListFields(ListMapper $listMapper)
    {
        $listMapper
            ->addIdentifier('title')
            ->add('author')
        ;
    }

    public function prePersist($image) {
        $this->manageFileUpload($image);
    }
    public function preUpdate($image) {
        $this->manageFileUpload($image);
    }
    private function manageFileUpload($image) {
        if ($image->getFile()) {
            $image->refreshUpdated();
        }
    }
}

和Blog.orm.yml

src/MyBlogBundle/Resources/config/Doctrine/Image.orm.yml

---

您忘记为UploadedFile类添加use语句，必须添加：

src/MyBLogBundle/Entity/Blog.php

<?php
use Symfony\Component\HttpFoundation\File\UploadedFile;

class Blog
{
}

---

这对我很有帮助，但随后出现了另一个错误：尝试调用类“MyBlogBundle\Entity\Blog”上的方法“setupDate”。我添加了新的proportie updated和方法setupDate和getUpdated：但是如果我再次尝试添加新的post-occure错误：在创建项的过程中发生了错误“MyBlogBundle\Entity\Blog:00000000 18B75CC600000001BADB528”。我罚款了我的错误：repositoryClass:MyBlogBundle\Entity\Repositories\ImageRepository-ImageRepository需要在BlogRepository上替换，并添加->添加（'image'，'file'，数组（'data_class'=>NULL））
<?php
use Symfony\Component\HttpFoundation\File\UploadedFile;

class Blog
{
}