From f5c60a1d9b971f9f22e9c3ff765d3ec257a01b32 Mon Sep 17 00:00:00 2001
From: Davis Raymond Muro <davisraymondmuro@outlook.com>
Date: Wed, 16 Dec 2020 14:24:57 +0300
Subject: [PATCH] Disable "form_versions" calculation for forms after a
 configurable limit

Disable "form_versions" calculation for forms that have submissions that surpass
the "SUBMISSION_RETRIEVAL_THRESHOLD" setting
---
 onadata/libs/serializers/xform_serializer.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/onadata/libs/serializers/xform_serializer.py b/onadata/libs/serializers/xform_serializer.py
index 77a8b245ba..b3acac8163 100644
--- a/onadata/libs/serializers/xform_serializer.py
+++ b/onadata/libs/serializers/xform_serializer.py
@@ -36,6 +36,11 @@
     get_enketo_urls, get_form_url)
 
 
+SUBMISSION_RETRIEVAL_THRESHOLD = getattr(settings,
+                                         "SUBMISSION_RETRIEVAL_THRESHOLD",
+                                         10000)
+
+
 def _create_enketo_urls(request, xform):
     """
     Generate enketo urls for a form
@@ -388,6 +393,8 @@ def get_form_versions(self, obj):
 
             if versions:
                 return versions
+            elif obj.num_of_submissions > SUBMISSION_RETRIEVAL_THRESHOLD:
+                return []
 
             versions = list(
                 Instance.objects.filter(xform=obj, deleted_at__isnull=True)