From 34f27f910b2a6368e3c23324b92e6a35a4ddae3a Mon Sep 17 00:00:00 2001
From: Sergey Fedoseev <fedoseev.sergey@gmail.com>
Date: Wed, 6 Sep 2017 09:29:11 +0500
Subject: [PATCH] Replaced @cached_property with class attributes where
 possible.

---
 .../gis/db/backends/postgis/operations.py     |  5 +---
 .../gis/db/backends/spatialite/operations.py  | 20 +++++++-------
 django/db/backends/sqlite3/features.py        | 26 +++++--------------
 3 files changed, 17 insertions(+), 34 deletions(-)

diff --git a/django/contrib/gis/db/backends/postgis/operations.py b/django/contrib/gis/db/backends/postgis/operations.py
index 40860b3d0e1..85e1f35fe1b 100644
--- a/django/contrib/gis/db/backends/postgis/operations.py
+++ b/django/contrib/gis/db/backends/postgis/operations.py
@@ -134,10 +134,7 @@ class PostGISOperations(BaseSpatialOperations, DatabaseOperations):
 
     unsupported_functions = set()
 
-    @cached_property
-    def select(self):
-        return '%s::bytea'
-
+    select = '%s::bytea'
     select_extent = None
 
     def __init__(self, connection):
diff --git a/django/contrib/gis/db/backends/spatialite/operations.py b/django/contrib/gis/db/backends/spatialite/operations.py
index 69dc3b99f63..c0ee23124d8 100644
--- a/django/contrib/gis/db/backends/spatialite/operations.py
+++ b/django/contrib/gis/db/backends/spatialite/operations.py
@@ -68,17 +68,15 @@ class SpatiaLiteOperations(BaseSpatialOperations, DatabaseOperations):
     def select(self):
         return 'CAST (AsEWKB(%s) AS BLOB)' if self.spatial_version >= (4, 3, 0) else 'AsText(%s)'
 
-    @cached_property
-    def function_names(self):
-        return {
-            'Length': 'ST_Length',
-            'LineLocatePoint': 'ST_Line_Locate_Point',
-            'NumPoints': 'ST_NPoints',
-            'Reverse': 'ST_Reverse',
-            'Scale': 'ScaleCoords',
-            'Translate': 'ST_Translate',
-            'Union': 'ST_Union',
-        }
+    function_names = {
+        'Length': 'ST_Length',
+        'LineLocatePoint': 'ST_Line_Locate_Point',
+        'NumPoints': 'ST_NPoints',
+        'Reverse': 'ST_Reverse',
+        'Scale': 'ScaleCoords',
+        'Translate': 'ST_Translate',
+        'Union': 'ST_Union',
+    }
 
     @cached_property
     def unsupported_functions(self):
diff --git a/django/db/backends/sqlite3/features.py b/django/db/backends/sqlite3/features.py
index c82d565b6ef..a68633836d0 100644
--- a/django/db/backends/sqlite3/features.py
+++ b/django/db/backends/sqlite3/features.py
@@ -31,25 +31,13 @@ class DatabaseFeatures(BaseDatabaseFeatures):
     supports_temporal_subtraction = True
     ignores_table_name_case = True
     supports_cast_with_precision = False
-
-    @cached_property
-    def uses_savepoints(self):
-        return Database.sqlite_version_info >= (3, 6, 8)
-
-    @cached_property
-    def supports_index_column_ordering(self):
-        return Database.sqlite_version_info >= (3, 3, 0)
-
-    @cached_property
-    def can_release_savepoints(self):
-        return self.uses_savepoints
-
-    @cached_property
-    def can_share_in_memory_db(self):
-        return (
-            Database.__name__ == 'sqlite3.dbapi2' and
-            Database.sqlite_version_info >= (3, 7, 13)
-        )
+    uses_savepoints = Database.sqlite_version_info >= (3, 6, 8)
+    supports_index_column_ordering = Database.sqlite_version_info >= (3, 3, 0)
+    can_release_savepoints = uses_savepoints
+    can_share_in_memory_db = (
+        Database.__name__ == 'sqlite3.dbapi2' and
+        Database.sqlite_version_info >= (3, 7, 13)
+    )
 
     @cached_property
     def supports_stddev(self):