From 2fecf99ade208e3a80958ee4fc28ff62549c575b Mon Sep 17 00:00:00 2001
From: Florian Apolloner <florian@apolloner.eu>
Date: Fri, 2 Dec 2022 09:43:18 +0100
Subject: [PATCH] Refs #33308 -- Made PostGISAdapter do not use psycopg2's
 Binary().

---
 .../gis/db/backends/postgis/adapter.py        | 20 +++++++++----------
 .../gis/db/backends/postgis/pgraster.py       |  3 +--
 2 files changed, 10 insertions(+), 13 deletions(-)

diff --git a/django/contrib/gis/db/backends/postgis/adapter.py b/django/contrib/gis/db/backends/postgis/adapter.py
index 20b0327d5c..19d3a60492 100644
--- a/django/contrib/gis/db/backends/postgis/adapter.py
+++ b/django/contrib/gis/db/backends/postgis/adapter.py
@@ -1,7 +1,7 @@
 """
  This object provides quoting for GEOS geometries into PostgreSQL/PostGIS.
 """
-from psycopg2 import Binary
+from psycopg2 import extensions
 from psycopg2.extensions import ISQLQuote
 
 from django.contrib.gis.db.backends.postgis.pgraster import to_pgraster
@@ -19,7 +19,6 @@ class PostGISAdapter:
         # the adaptor) and the SRID from the geometry or raster.
         if self.is_geometry:
             self.ewkb = bytes(obj.ewkb)
-            self._adapter = Binary(self.ewkb)
         else:
             self.ewkb = to_pgraster(obj)
 
@@ -48,13 +47,12 @@ class PostGISAdapter:
     def _fix_polygon(cls, poly):
         return poly
 
-    def prepare(self, conn):
-        """
-        This method allows escaping the binary in the style required by the
-        server's `standard_conforming_string` setting.
-        """
-        if self.is_geometry:
-            self._adapter.prepare(conn)
+    def _quote(self, value):
+        adapted = extensions.adapt(value)
+        if hasattr(adapted, "encoding"):
+            adapted.encoding = "utf8"
+        # getquoted() returns a quoted bytestring of the adapted value.
+        return adapted.getquoted().decode()
 
     def getquoted(self):
         """
@@ -64,8 +62,8 @@ class PostGISAdapter:
             # Psycopg will figure out whether to use E'\\000' or '\000'.
             return b"%s(%s)" % (
                 b"ST_GeogFromWKB" if self.geography else b"ST_GeomFromEWKB",
-                self._adapter.getquoted(),
+                self._quote(self.ewkb).encode(),
             )
         else:
             # For rasters, add explicit type cast to WKB string.
-            return b"'%s'::raster" % self.ewkb.encode()
+            return b"'%s'::raster" % self.ewkb.hex().encode()
diff --git a/django/contrib/gis/db/backends/postgis/pgraster.py b/django/contrib/gis/db/backends/postgis/pgraster.py
index 22794342ca..c231b4863f 100644
--- a/django/contrib/gis/db/backends/postgis/pgraster.py
+++ b/django/contrib/gis/db/backends/postgis/pgraster.py
@@ -149,5 +149,4 @@ def to_pgraster(rast):
         # Add packed header and band data to result
         result += bandheader + band.data(as_memoryview=True)
 
-    # Convert raster to hex string before passing it to the DB.
-    return result.hex()
+    return result