fix tags in posts

fet2020/posts/models.py

@@ -249,6 +249,10 @@ class Post(models.Model):
     def three_tag_names(self):
         return self.tags.names()[:3]
 
+    @property
+    def tag_names(self):
+        return [t for t in self.tags.names()]
+
     @property
     def imageurl(self):
         """