Change ManyToMany between entry & tag

Following https://gist.github.com/Ocramius/3121916

Be sure to remove the related entity when removing an entity.

Let say you have Entry -> EntryTag -> Tag.
If you remove the entry:

 - before that commit, the EntryTag will stay (at least using SQLite).
 - with that commit, the related entity is removed

2 files changed, 37 insertions, 3 deletions

diff --git a/src/Wallabag/CoreBundle/Entity/Entry.php b/src/Wallabag/CoreBundle/Entity/Entry.php
index 84981414..ceae78b0 100644
--- a/src/Wallabag/CoreBundle/Entity/Entry.php
+++ b/src/Wallabag/CoreBundle/Entity/Entry.php
@@ -178,7 +178,15 @@ class Entry
 
     /**
      * @ORM\ManyToMany(targetEntity="Tag", inversedBy="entries", cascade={"persist"})
-     * @ORM\JoinTable
+     * @ORM\JoinTable(
+     *  name="entry_tag",
+     *  joinColumns={
+     *      @ORM\JoinColumn(name="entry_id", referencedColumnName="id")
+     *  },
+     *  inverseJoinColumns={
+     *      @ORM\JoinColumn(name="tag_id", referencedColumnName="id")
+     *  }
+     * )
      *
      * @Groups({"entries_for_user", "export_all"})
      */
@@ -526,13 +534,18 @@ class Entry
             }
         }
 
-        $this->tags[] = $tag;
+        $this->tags->add($tag);
         $tag->addEntry($this);
     }
 
     public function removeTag(Tag $tag)
     {
+        if (!$this->tags->contains($tag)) {
+            return;
+        }
+
         $this->tags->removeElement($tag);
+        $tag->removeEntry($this);
     }
 
     /**
diff --git a/src/Wallabag/CoreBundle/Entity/Tag.php b/src/Wallabag/CoreBundle/Entity/Tag.php
index b4adbbd3..4b480ff1 100644
--- a/src/Wallabag/CoreBundle/Entity/Tag.php
+++ b/src/Wallabag/CoreBundle/Entity/Tag.php
@@ -98,9 +98,30 @@ class Tag
         return $this->slug;
     }
 
+    /**
+     * @param Entry $entry
+     */
     public function addEntry(Entry $entry)
     {
-        $this->entries[] = $entry;
+        if ($this->entries->contains($entry)) {
+            return;
+        }
+
+        $this->entries->add($entry);
+        $entry->addTag($this);
+    }
+
+    /**
+     * @param Entry $entry
+     */
+    public function removeEntry(Entry $entry)
+    {
+        if (!$this->entries->contains($entry)) {
+            return;
+        }
+
+        $this->entries->removeElement($entry);
+        $entry->removeTag($this);
     }
 
     public function hasEntry($entry)