add tagging

src/Entity/DocumentTag.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+#[ORM\Table(name: 'document_tag')]
+class DocumentTag
+{
+    #[ORM\Id]
+    #[ORM\ManyToOne(targetEntity: Document::class, inversedBy: 'documentTags')]
+    #[ORM\JoinColumn(name: 'document_id', referencedColumnName: 'id', nullable: false, onDelete: 'CASCADE')]
+    private Document $document;
+
+    #[ORM\Id]
+    #[ORM\ManyToOne(targetEntity: Tag::class)]
+    #[ORM\JoinColumn(name: 'tag_id', referencedColumnName: 'id', nullable: false, onDelete: 'CASCADE')]
+    private Tag $tag;
+
+    public function __construct(Document $document, Tag $tag)
+    {
+        $this->document = $document;
+        $this->tag = $tag;
+    }
+
+    public function getDocument(): Document
+    {
+        return $this->document;
+    }
+
+    public function getTag(): Tag
+    {
+        return $this->tag;
+    }
+}