How to generate a multiple field in the symfony admin panel

The solution was found thanks to this guy . He routinely used the type of "collection"

Here's what I get in the end: the News.php file

 namespace AppBundle\Entity; use Doctrine\Common\Collections\ArrayCollection; use Doctrine\ORM\Mapping as ORM; use Symfony\Component\HttpFoundation\File\File; use Vich\UploaderBundle\Mapping\Annotation as Vich; /** * News * * @ORM\Table(name="news") * @ORM\Entity(repositoryClass="AppBundle\Repository\NewsRepository") * @ORM\HasLifecycleCallbacks() * @Vich\Uploadable */ class News { /** * @var datetime $created * * @ORM\Column(type="datetime") */ protected $created; /** * @return datetime */ public function getCreated() { return $this->created; } public function setCreated($newdate) { $this->created = $newdate; return $this; } /** * @var datetime $updated * * @ORM\Column(type="datetime", nullable = true) */ protected $updated; /** * Gets triggered only on insert * @ORM\PrePersist */ public function onPrePersist() { $this->created = new \DateTime("now"); } /** * Gets triggered every time on update * @ORM\PreUpdate */ public function onPreUpdate() { $this->updated = new \DateTime("now"); } /** * @var int * * @ORM\Column(name="id", type="integer") * @ORM\Id * @ORM\GeneratedValue(strategy="AUTO") */ private $id; /** * @var string * * @ORM\Column(name="name", type="string", length=255) */ private $name; /** * @var string * * @ORM\Column(name="shortDescription", type="string", length=1024) */ private $shortDescription; /** * @var string * * @ORM\Column(name="fullDescription", type="text") */ private $fullDescription; /** * Get id * * @return integer */ public function getId() { return $this->id; } /** * Set name * * @param string $name * @return News */ public function setName($name) { $this->name = $name; return $this; } /** * Get name * * @return string */ public function getName() { return $this->name; } /** * Set shortDescription * * @param string $shortDescription * @return News */ public function setShortDescription($shortDescription) { $this->shortDescription = $shortDescription; return $this; } /** * Get shortDescription * * @return string */ public function getShortDescription() { return $this->shortDescription; } /** * Set fullDescription * * @param string $fullDescription * @return News */ public function setFullDescription($fullDescription) { $this->fullDescription = $fullDescription; return $this; } /** * Get fullDescription * * @return string */ public function getFullDescription() { return $this->fullDescription; } /** * @var string * * @ORM\Column(name="image", type="string", length=1024) */ private $image; /** * Set image * * @param string $image * @return Image */ public function setImage($image) { $this->image = $image; return $this; } /** * Get image * * @return string */ public function getImage() { return $this->image; } /** * @Vich\UploadableField(mapping="newsgallery", fileNameProperty="image") * @var File */ private $imageFile; public function setImageFile(File $image = null) { $this->imageFile = $image; } public function getImageFile() { return $this->imageFile; } /** * @ORM\OneToMany(targetEntity="NewsGallerys", mappedBy="news") */ private $news_gallerys; public function __construct() { $this->news_gallerys = new ArrayCollection(); } public function __toString() { return (string)$this->name; } /** * Add news_gallerys * * @param \AppBundle\Entity\NewsGallerys $news_gallerys * * @return News */ public function addNewsGallerys(\AppBundle\Entity\NewsGallerys $news_gallerys) { $this->news_gallerys[] = $news_gallerys; return $this; } /** * Remove news_gallerys * * @param \AppBundle\Entity\NewsGallerys $news_gallerys */ public function removeNewsGallerys(\AppBundle\Entity\NewsGallerys $news_gallerys) { $this->news_gallerys->removeElement($news_gallerys); } /** * Get news_gallerys * * @return NewsGallerys[]|ArrayCollection */ public function getNewsGallerys() { return $this->news_gallerys; } } 

File NewsGallerys.php

 namespace AppBundle\Entity; use Doctrine\Common\Collections\ArrayCollection; use Doctrine\ORM\Mapping as ORM; use Symfony\Component\HttpFoundation\File\File; use Symfony\Component\Validator\Constraints as Assert; use Vich\UploaderBundle\Mapping\Annotation as Vich; /** * Image * * @ORM\Table(name="news_gallery") * @ORM\Entity(repositoryClass="AppBundle\Repository\NewsGallerysRepository") * @Vich\Uploadable */ class NewsGallerys { /** * @var int * * @ORM\Column(name="id", type="integer") * @ORM\Id * @ORM\GeneratedValue(strategy="AUTO") */ private $id; /** * @var string * * @ORM\Column(name="title", type="string", length=255, nullable=true) */ private $name; /** * @var string * * @ORM\Column(name="image", type="string", length=1024) */ private $image; /** * @Assert\File( * maxSize="2m", * mimeTypes={"image/png", "image/jpeg"} * ) * @Vich\UploadableField(mapping="newsgallery", fileNameProperty="image") * @var File */ private $imageFile; /** * Get id * * @return integer */ public function getId() { return $this->id; } /** * Set title * * @param string $title * @return NewsGallerys */ public function setName($name) { $this->title = $name; return $this; } /** * Get title * * @return string */ public function getName() { return $this->name; } /** * Set image * * @param File|null $image * @return NewsGallerys */ public function setImageFile(File $image = null) { $this->imageFile = $image; return $this; } /** * @return File */ public function getImageFile() { return $this->imageFile; } /** * @param string $image * @return NewsGallerys */ public function setImage($image) { $this->image = $image; return $this; } /** * Get image * * @return string */ public function getImage() { return $this->image; } /** * @ORM\ManyToOne(targetEntity="News",cascade={"persist", "remove"},inversedBy="news_gallerys") * @ORM\JoinColumn(name="id_news",referencedColumnName="id",nullable=true) */ public $news; public function __toString(){ return (string) $this->name; } } 

in the config.yml for the entity News has prescribed the following fields:

 News: label: app.menu.news class: AppBundle\Entity\News list: fields: - name - shortDescription show: fields: - name - shortDescription - fullDescription - { property: 'image', type: 'image', base_path: %app.path.newsgallery% } form: fields: - { property: 'created' } - name - shortDescription - fullDescription - { property: 'imageFile', type: 'vich_image' } - { property: 'news_gallerys', type: 'collection', type_options: { entry_type: 'AppBundle\Form\ImageType' } } 

Next, create a file ImageType.php:

 namespace AppBundle\Form; use Symfony\Component\Form\AbstractType; use Symfony\Component\Form\FormBuilderInterface; use Symfony\Component\OptionsResolver\OptionsResolver; use Vich\UploaderBundle\Form\Type\VichFileType; class ImageType extends AbstractType { /** * @param FormBuilderInterface $builder * @param array $options */ public function buildForm(FormBuilderInterface $builder, array $options) { $builder ->add('name') ->add('imageFile', VichFileType::class) ; } /** * @param OptionsResolver $resolver */ public function configureOptions(OptionsResolver $resolver) { $resolver->setDefaults(array( 'data_class' => 'AppBundle\Entity\NewsGallerys' )); } } 

As a result, I receive multiple additions of files with a picture type, if they have already been added to the database, it is displayed correctly, but I can’t add a new one or delete it. Displays error:

request.CRITICAL: Uncaught PHP Exception Doctrine \ ORM \ ORMInvalidArgumentException: "To understand this subject: Either explicitly: #ManineToOne (.., cascade = {"persist"}). "

If someone tells you how to solve it, I will be grateful.

Hello!

Here is a link - your case is described there: http://symfony.com/doc/current/form/form_collections.html#allowing-new-tags-with-the-prototype

In short:

• you need to add the option allow_add = true in the news_gallerys field, and
  necessary - allow_delete = true

• then display the prototype in the template for adding images:

  data-prototype = "{{form_widget (form.tags.vars.prototype) | e ('html_attr')}}"

• and fasten js to add form elements