From f7408b49a54d746db252ebc7176a67506d183a58 Mon Sep 17 00:00:00 2001
From: kingbuzzman <buzzi.javier@gmail.com>
Date: Thu, 25 Apr 2019 16:07:28 +0000
Subject: [PATCH] Refs #30148 -- Moved logging queries in CursorDebugWrapper to
 debug_sql() contextmanager.

---
 django/db/backends/utils.py | 41 ++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 21 deletions(-)

diff --git a/django/db/backends/utils.py b/django/db/backends/utils.py
index 597e6b3a9d..7fc2449a21 100644
--- a/django/db/backends/utils.py
+++ b/django/db/backends/utils.py
@@ -3,6 +3,7 @@ import decimal
 import functools
 import hashlib
 import logging
+from contextlib import contextmanager
 from time import time
 
 from django.conf import settings
@@ -94,40 +95,38 @@ class CursorDebugWrapper(CursorWrapper):
     # XXX callproc isn't instrumented at this time.
 
     def execute(self, sql, params=None):
-        start = time()
-        try:
+        with self.debug_sql(sql, params, use_last_executed_query=True):
             return super().execute(sql, params)
-        finally:
-            stop = time()
-            duration = stop - start
-            sql = self.db.ops.last_executed_query(self.cursor, sql, params)
-            self.db.queries_log.append({
-                'sql': sql,
-                'time': "%.3f" % duration,
-            })
-            logger.debug(
-                '(%.3f) %s; args=%s', duration, sql, params,
-                extra={'duration': duration, 'sql': sql, 'params': params}
-            )
 
     def executemany(self, sql, param_list):
+        with self.debug_sql(sql, param_list, many=True):
+            return super().executemany(sql, param_list)
+
+    @contextmanager
+    def debug_sql(self, sql=None, params=None, use_last_executed_query=False, many=False):
         start = time()
         try:
-            return super().executemany(sql, param_list)
+            yield
         finally:
             stop = time()
             duration = stop - start
+            if use_last_executed_query:
+                sql = self.db.ops.last_executed_query(self.cursor, sql, params)
             try:
-                times = len(param_list)
-            except TypeError:           # param_list could be an iterator
+                times = len(params) if many else ''
+            except TypeError:
+                # params could be an iterator.
                 times = '?'
             self.db.queries_log.append({
-                'sql': '%s times: %s' % (times, sql),
-                'time': "%.3f" % duration,
+                'sql': '%s times: %s' % (times, sql) if many else sql,
+                'time': '%.3f' % duration,
             })
             logger.debug(
-                '(%.3f) %s; args=%s', duration, sql, param_list,
-                extra={'duration': duration, 'sql': sql, 'params': param_list}
+                '(%.3f) %s; args=%s',
+                duration,
+                sql,
+                params,
+                extra={'duration': duration, 'sql': sql, 'params': params},
             )