From 0ab1dc0a8bfc580e92ad4af413ab3fd3797f0d2a Mon Sep 17 00:00:00 2001
From: Sergey Fedoseev <fedoseev.sergey@gmail.com>
Date: Fri, 7 Jul 2017 17:54:08 +0500
Subject: [PATCH] Fixed deepcopy of AreaField and DistanceField.

---
 django/contrib/gis/db/models/sql/conversion.py |  2 ++
 tests/gis_tests/test_fields.py                 | 15 +++++++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 tests/gis_tests/test_fields.py

diff --git a/django/contrib/gis/db/models/sql/conversion.py b/django/contrib/gis/db/models/sql/conversion.py
index d9b79f237d..eafa7b5d17 100644
--- a/django/contrib/gis/db/models/sql/conversion.py
+++ b/django/contrib/gis/db/models/sql/conversion.py
@@ -11,6 +11,7 @@ from django.db import models
 class AreaField(models.FloatField):
     "Wrapper for Area values."
     def __init__(self, area_att=None):
+        super().__init__()
         self.area_att = area_att
 
     def get_prep_value(self, value):
@@ -40,6 +41,7 @@ class AreaField(models.FloatField):
 class DistanceField(models.FloatField):
     "Wrapper for Distance values."
     def __init__(self, distance_att=None):
+        super().__init__()
         self.distance_att = distance_att
 
     def get_prep_value(self, value):
diff --git a/tests/gis_tests/test_fields.py b/tests/gis_tests/test_fields.py
new file mode 100644
index 0000000000..fb0c953f21
--- /dev/null
+++ b/tests/gis_tests/test_fields.py
@@ -0,0 +1,15 @@
+import copy
+
+from django.contrib.gis.db.models.sql import AreaField, DistanceField
+from django.test import SimpleTestCase
+
+
+class FieldsTests(SimpleTestCase):
+
+    def test_area_field_deepcopy(self):
+        field = AreaField()
+        self.assertEqual(copy.deepcopy(field), field)
+
+    def test_distance_field_deepcopy(self):
+        field = DistanceField()
+        self.assertEqual(copy.deepcopy(field), field)