From da71e4bb086593b5ca76bf698358d27ead2cfed2 Mon Sep 17 00:00:00 2001
From: Sergey Fedoseev <fedoseev.sergey@gmail.com>
Date: Wed, 6 Dec 2017 14:59:30 +0500
Subject: Fixed #28896 -- Reallowed filtering a queryset with
 GeometryField=None.

Regression in 58da81a5a372a69f0bac801c412b57f3cce5f188.
---
 django/contrib/gis/db/models/fields.py | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'django')

diff --git a/django/contrib/gis/db/models/fields.py b/django/contrib/gis/db/models/fields.py
index 5e869a8243..12af07b9b7 100644
--- a/django/contrib/gis/db/models/fields.py
+++ b/django/contrib/gis/db/models/fields.py
@@ -167,6 +167,8 @@ class BaseSpatialField(Field):
 
     def get_prep_value(self, value):
         obj = super().get_prep_value(value)
+        if obj is None:
+            return None
         # When the input is not a geometry or raster, attempt to construct one
         # from the given string input.
         if isinstance(obj, GEOSGeometry):
-- 
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