add slug for tags

src/Wallabag/CoreBundle/Entity/Tag.php

@@ -7,6 +7,7 @@ use JMS\Serializer\Annotation\XmlRoot;
 use JMS\Serializer\Annotation\ExclusionPolicy;
 use JMS\Serializer\Annotation\Expose;
 use Doctrine\Common\Collections\ArrayCollection;
+use Gedmo\Mapping\Annotation as Gedmo;
 
 /**
  * Tag.
@@ -36,6 +37,12 @@ class Tag
      */
     private $label;
 
+    /**
+     * @Gedmo\Slug(fields={"label"})
+     * @ORM\Column(length=128, unique=true)
+     */
+    private $slug;
+
     /**
      * @ORM\ManyToMany(targetEntity="Entry", mappedBy="tags", cascade={"persist"})
      */
@@ -91,6 +98,11 @@ class Tag
         return $this->label;
     }
 
+    public function getSlug()
+    {
+        return $this->slug;
+    }
+
     public function addEntry(Entry $entry)
     {
         $this->entries[] = $entry;