All commentables are notifying

communication/models.py

@@ -2,32 +2,6 @@ from django.db import models
 from django.contrib.auth.models import User
 
 
-class Commentable(models.Model):
-    pass
-
-
-class Thread(models.Model):
-    topic = models.OneToOne(Commentable)
-
-
-class Comment(models.Model):
-    thread = models.ForeignKey(Thread)
-    parent = models.ForeignKey(
-        'Comment',
-        related_name="replies",
-    )
-    author = models.ForeignKey(
-        User,
-        verbose_name=_("auteur"),
-        editable=False
-    )
-    at = models.DateTimeField(
-        _("date d'écriture"),
-        auto_now_add=True
-    )
-    text = models.TextField(_("corps du message"))
-
-
 class Notifying(models.Model):
     subscribed = models.ManyToManyField(
         User,
@@ -51,3 +25,29 @@ class Notification(models.Model):
         blank=True
     )
     text = models.TextField(_("corps de la notification"))
+
+
+class Commentable(Notifying):
+    pass
+
+
+class Thread(models.Model):
+    topic = models.OneToOne(Commentable)
+
+
+class Comment(models.Model):
+    thread = models.ForeignKey(Thread)
+    parent = models.ForeignKey(
+        'Comment',
+        related_name="replies",
+    )
+    author = models.ForeignKey(
+        User,
+        verbose_name=_("auteur"),
+        editable=False
+    )
+    at = models.DateTimeField(
+        _("date d'écriture"),
+        auto_now_add=True
+    )
+    text = models.TextField(_("corps du message"))