re-add subscriptions

app/models.py

@@ -56,6 +56,18 @@ class Users(Model):
             WHERE users.id = ?"""
         return db.fetch_one(q, self.id)
 
+    def get_all_subscriptions(self):
+        q = """
+            SELECT threads.title AS thread_title, threads.slug AS thread_slug
+            FROM
+                threads
+            JOIN
+                subscriptions ON subscriptions.thread_id = threads.id
+            WHERE
+                subscriptions.user_id = ?"""
+        return db.query(q, self.id)
+
+
 class Topics(Model):
     table = "topics"