Do not use RDMBS dependent function

src/entity/pair.py

@@ -3,6 +3,7 @@ from orator.orm import Model
 from orator.orm import belongs_to
 from orator.orm import has_many
 
+from src.utils import random_element
 import src.entity.reply
 import src.entity.chat
 import src.entity.word
@@ -31,7 +32,7 @@ class Pair(Model):
     @staticmethod
     def get_random_pair(chat_id, first_id, second_id_list):
         ten_minutes_ago = datetime.now() - timedelta(seconds=10 * 60)
-        return Pair\
+        pairs = Pair\
             .with_({
                 'replies': lambda q: q.order_by('count', 'desc').limit(3)
             })\
@@ -39,5 +40,8 @@ class Pair(Model):
             .where('first_id', first_id)\
             .where_in('second_id', second_id_list)\
             .where('created_at', '<', ten_minutes_ago)\
-            .order_by_raw('RANDOM()')\
-            .first()
+            .limit(3)\
+            .get()\
+            .all()
+
+        return random_element(pairs)